Spencer, I have a lot of Pinus Sylvestris seeds that just broke their dormancy and started to grow. They are in a very narrow pot made out from a plastic bottle because I didn't expect that much seeds growing, should I let them grow up to 4cm or should I remove them right away into individual pots? Thank you.
I would say once they are around and inch tall and they have stopped growing fresh growth(going to bud)then separate them.thanks for watching.hope this helps
I have some seeds that I knocked out from pinecones. I have the good ones soaking in water right now. Thank you for this tutorial. I'm putting them in the refrigerator tonight.
Same here. I've planted about a hundred white, norway, and black spruce that I dug up here and there. I collected a half grocery bag of cones and dried and banged them out and seperated seed from duff. Tried to but some from the state but they've sold out of everything!
Well done. I'm trying to start some white spruce. My cow pastures are being lined with christmas trees. About thirty years ago I planted about 2 dozen white spruce in my north most pasture. My children and I harvested maybe ten trees from that little stand. Great memories. The remaining dozen are pushing 30- 40 feet now. Hope to be blessed with harvesting the new patch in five or six years. I've got about 250 white, black, and norway spruce planted this year and bought some blue seed and cleaned some cones for white. Hopefully with your good advise I can get some more going.
Hey there, I got 5 seeds as a christmas gift, so I planted them right away. 3 of them showed up so far and they get me very excited. I was wondering about when should i separate them and replant them in bigger pots, since if they are together, their roots will get tangled and likely suffocate one another? Honestly, I'm very bad with plants and this is my first serious attempt after the beans in kindergarten. Thanks in advance!
Hi Spencer, two questions… when should I put them in the fridge? Should I target March or April for April/May planting? Also, after planting, how frequently should I water? Love the video, thanks!
How long and what size pots should they be put in as they grow? I started 500 fir and spruce trees from seeds and they are now one year old in a one gallon pot. I plan on upsizing the pots but don’t know how big to go. I plan on growing them in lots for about 5 years before trying to sell the, as wind break trees. any advice would be helpful.
To answer all your questions - Put seeds in damp not wet paper towel Then put in fridge for a few weeks Then put in compost around 1cm deep Do all of this around winter time so when it warms up they will grow After a few weeks they will sprout and you can just keep pottong them up as they get bigger or plant in the ground Hope this helps
I found the paper towel step unnecessary. You can float test viable seed after stratifying. Then I just planted in a flat with a dome and they came up. What I want to know is how to care for them after they come up?
Hi, I didn't have any composting mix so I just used regular dirt. Will it work and if I sprinkle composted dirt on it later will it leak down to the seeds when watered.
Hello! Are the seeds covered in a wet napkin that need to be kept in the fridge or just in a sunny place? And is there another way to just plant the seeds in the pot to place them in the sun? I will wait your answer... Thank you!
This is great. I have two little ones like you show growing in the same pot. How big should they be before re-potting them? I plan to keep them in pots. And will they survive okay being repotted? Any tips in how to make that a successful transition are greatly appreciated!
Hello Spencer, last summer i stratified and sprouted spruce seeds in August, and because they were so small when the winter came in December, i brought them inside my house, where they all died of damping off fungus. I have more seeds now (June 2019), but they are not stratified yet. Do you think its too late in the year for me to stratify and plant them? If they are too small when the winter comes, is there a way to stop them from damping off if i was to bring them inside this winter?
No,I have started them at this time and are going to do some more.they are very hardy so you could leave them outside or put them in a cold frame.i just leave mine outside because if you think about it in the wild they just sit there.thanks for watching and the best of luck with your trees
I got a buzzy seed package as a gift, the pot is 1 inch high, do I need a bigger pot right away so all four seeds don't die on me and have you ever used a pot that small, or germinatated?
@@spencersnursery1547 "pot them on" really gets the trees growing into more space I reckon, each their own character. I got the point of what you said, so thanks back.
I found some Norway Spruce tree pine cones in Upper Michigan, near Sault Saint Marie, and I put them in a pot, and soaked them. Would that work as well? Also, how long would they germinate?
Are you supposed to place the bag with the seeds in the fridge or the freezer? I have mountian spruce seeds if thats the correct name in english. Hello from sweden :)
Hi Spencer, thanks for your video. A small question on seed growing - I grow my scots pine seedlings in the small biodegradable cells. I keep them under the sunlight indoors and well watered, but they keep dying. Should I put them in the bigger pot, so the cell can biodegrade and add some fertilizer? Thanks!
Hiya, great video. Early this year I used this process to grow some ceder seeds and I've been successful. I have about 10 small trees about 1 inch tall. They've been outside in big tall pots all year (since April). But with winter coming and all the rain weve had this year I've lost a few and now a few more are turning a little brown and look weak and unhealthy. What's the best thing to do. Or should I just leave them to face the winter. Will bringing them in the house help or will the heat kill them. I don't have a green house so not sure what's best. Thanks. Tom
I think it may be them rotting.bringing them indoors may increase the rotting with mire humidity. I have had same problems with young evergreens.best thing j have found is to keep them outside and the frost should harden them up.you may loose a few byt better than losing all of them.hope this helps
What kind of grow lights do you use? How many lumens do you use and how many hours do you keep them under the light? How often do you water the seedlings? Do you water them everyday and how much water do you give them?
I just used a grow light garden,only because it was winter at the time but growing them outdoors is fine.i water sparingly as I dont want to rot them,out dont water them at all
Hi. I have put some seeds in the fridge recently. One of them germinated in tissue. And I took it out so as to grow. But left the rest inside the fridge so as to germinate. Do I have to take them out or wait till they germinate?
If they have been in there for the time needed plant them,if not leave them.it doesnt matter too much as long as they have had their dormancy. If they are sprouting they are ready to plant.hope this helps thanks for watching
Thanks for the video. Very interesting. Never thought of growing these at all, though I do like the blue spruce, might give them a go . Would they be ok on a window sill once they have come through the soil? Thanks again. Nice variety on your channel.
Would recommend more light. I would start mid Feb inside and once they have come up put them in a greenhouse.tgen about March put outside and can then stay outside all year .they are very hardy once they have got a good root system
I've a question. I've stratified the magnolia seeds before, though it took around 4months and I did it in a soil fill plastic bags. I guess that paper towel method would work the same way. Just, is there any difference of when to start stratification or not? (By the way I'm going to use grow light). Thank you for a great upload.
Thanks,yes there is a difference, but not much.The paper towel is better in my opinion as they are less likely to rot the seeds.Just keep them moist but not wet.thanks for watching
my favourite way to get conifer seeds to germinate is by sowing in a pot, bury the pot in the corner of a deep bed for the winter ( covered with sharp sand ) an easy form of stratification. then in the spring, I lift the pot and place it in the greenhouse. it works every time, spencer...…………….brian
Great! Are you on Facebook? I'd like to show you some pictures of my Blue Spruce seedling, however, I think it is not a Blue Spruce one. It seems to be some kind of pine. Could you help me identify it?
Hey Spence um just one thing did you know blue spruce and norway spruce aren't the same thing? Love your channel and I'm working on starting my own nursery have you ever though about starting a plant nursery
안녕하세요 한국에 살고 있어요~ 가문비 색감빠지게 되어 이렇게 정보를 찾아보고있습니다. 한국에는 블루 가문비 (한국 : 은청가문비 ) 정보가 없네요. 후푸시라는 종을 찾는데 그 정보도 찾기 힘드네요 ㅜㅜ // 올려주신 영상에는 번역기가 안되서 영상을 눈으로 배우고 있네요 좋은 정보 감사합니다
All I did for Norway Spruce was brought in a couple cones in late fall and put on paper plate. When dried they fall out. Put seeds in plastic bag dry and set in fridge for 1 month. Planted with wing sticking out of soil in a flat and covered with dome. Tada! Problem is is no one tells you how to care for them at 2" tall. They seem to be stunted. Does anyone know? I'm concerned they will dry up. I never was good with indoor Norfolk pines and afraid I may lose the seedlings because no one addresses how to take care of tgem before they go outside to nusery.
Listen up look I wanted to grow a pine tree or spruce any type and I was at the river and we were in the woods and I’m only 9 at the time I I did this so my other cousin was 9 my brother is 13 and my other cousin was 11 and I found a baby spruce tree it was like just under one foot tall and I tried to rip it out of the ground in till I did it I trance planted it and it bin one year and it grew quite a bit it’s alive and it is like almost 2 feet now Mabey when I’m older when I move out of my parents house the tree will be big not humongous tho I mabey can take it and trace plant it in my front yard lol 😂
I found a spruce pine cone or I should say I pulled a spruce pine cone off of the tree set it on my dashboard in the sunlight which he did it and caused it to drop its seeds I took probably 20 seeds 30 put them in a plastic bag with a damp paper towel no stratification and six weeks later I had for seeds that had begun to be rude or even produce small needlesSo I transferred them to 16 ounce cups with a mixture of topsoil and Pete Moss in them… I will try to update this in a couple of weeks
I'm thinking about growing Christmas trees I have an acre and I live in Merced California, it's about 103 in the summer and 60 when it's coldest, when would be a good time to start my trees and do they take a lot of watering. can you tell me a little bit about how to start this.
Try starting them in late winter. By the way spruce seeds dont need stratification. Just sow on soil very lightly and keep the soil moist until the seeds germinate
So what if I happen to have them grow up all around me, this includes spruces, firs, and pines.....??!?!?! Ok I'm simply kidding ya, but seriously thanks for the lesson!!! 😁😁😁😁
Spencer, I have a lot of Pinus Sylvestris seeds that just broke their dormancy and started to grow. They are in a very narrow pot made out from a plastic bottle because I didn't expect that much seeds growing, should I let them grow up to 4cm or should I remove them right away into individual pots? Thank you.
I would say once they are around and inch tall and they have stopped growing fresh growth(going to bud)then separate them.thanks for watching.hope this helps
Thank you
Thank you for helping me start my own forest !!!!!!!!!!
Great! Good luck with your trees and thanks for watching
good luck keep going
I have some seeds that I knocked out from pinecones. I have the good ones soaking in water right now. Thank you for this tutorial. I'm putting them in the refrigerator tonight.
Same here. I've planted about a hundred white, norway, and black spruce that I dug up here and there. I collected a half grocery bag of cones and dried and banged them out and seperated seed from duff. Tried to but some from the state but they've sold out of everything!
I LOVE blue spruce and norway spruce. I love them very much.
I wish I watched this before I started my little seed project. Great video!
Brilliant well done I’m germinating acorns to grown an oak forrest. I e got about 1589 so far it’s so exiting
Well done. I'm trying to start some white spruce. My cow pastures are being lined with christmas trees. About thirty years ago I planted about 2 dozen white spruce in my north most pasture. My children and I harvested maybe ten trees from that little stand. Great memories. The remaining dozen are pushing 30- 40 feet now. Hope to be blessed with harvesting the new patch in five or six years. I've got about 250 white, black, and norway spruce planted this year and bought some blue seed and cleaned some cones for white. Hopefully with your good advise I can get some more going.
Nice demonstration of how to grow spruce seedlings. I’ve subscribed following a recommendation from Ant’s channel. Take care. Nick
Thanks.hope you enjoy
Well done. Good luck with your gardening and utube channel. Great job. Hope this is your future career!
Very cool, I'm growing balsam fir here in new hampshire u.s.a. very useful tips
Thanks.good luck with your firs
Great video.you just got me to buy some blue spruce now.ill get them going when they come
😀good to hear.in 5 years we will be selling loads if cut christmas trees!
Great video, well explained, thanks! I have some Fraser Fir seeds on the way in the post. Cheers
Hi. Can you tell me which jacks magic to purchase please for my blue spruces?
Hey there,
I got 5 seeds as a christmas gift, so I planted them right away. 3 of them showed up so far and they get me very excited. I was wondering about when should i separate them and replant them in bigger pots, since if they are together, their roots will get tangled and likely suffocate one another? Honestly, I'm very bad with plants and this is my first serious attempt after the beans in kindergarten. Thanks in advance!
Just wait till they get about 4cm tall and when the new growth isn't soft .Then you can repot them .Just use a spoon to lift them up carefully.
Thanks
@@spencersnursery1547 thanks a lot, you are great!
@@adelinastiliyanova6025 thanks.no problem
i’m growing a blue spruce and i am going to collect seeds from my dads 150+ year old norway spruces this fall
Hi Spencer, two questions… when should I put them in the fridge? Should I target March or April for April/May planting? Also, after planting, how frequently should I water? Love the video, thanks!
They look good.i did some last year and are about 1 inch tall
Yeah some do better than others. Once they get going they grow very fast
How long and what size pots should they be put in as they grow? I started 500 fir and spruce trees from seeds and they are now one year old in a one gallon pot. I plan on upsizing the pots but don’t know how big to go. I plan on growing them in lots for about 5 years before trying to sell the, as wind break trees. any advice would be helpful.
Hi would christmas tree seed germinate in a cold shed or is the fridge.
To answer all your questions -
Put seeds in damp not wet paper towel
Then put in fridge for a few weeks
Then put in compost around 1cm deep
Do all of this around winter time so when it warms up they will grow
After a few weeks they will sprout and you can just keep pottong them up as they get bigger or plant in the ground
Hope this helps
Will a damp throw away cloth be ok or does it have to be kitchen roll
Kitchen roll is best
I found the paper towel step unnecessary. You can float test viable seed after stratifying. Then I just planted in a flat with a dome and they came up. What I want to know is how to care for them after they come up?
Very well explained ... especially for me as I’m a complete beginner.. thanks🌲
Pine seeds gets in auntumn station?
Thanks for the video. After you planted the seeds, how often do you need to water?
Hi, I didn't have any composting mix so I just used regular dirt. Will it work and if I sprinkle composted dirt on it later will it leak down to the seeds when watered.
as long as it drains well and doesn't go all sticky like clay it should be ok
@@spencersnursery1547 thanks Sir
Hello!
Are the seeds covered in a wet napkin that need to be kept in the fridge or just in a sunny place? And is there another way to just plant the seeds in the pot to place them in the sun?
I will wait your answer...
Thank you!
Can you grow seeds without putting them in the fridge or is it required?
This is great. I have two little ones like you show growing in the same pot. How big should they be before re-potting them? I plan to keep them in pots. And will they survive okay being repotted? Any tips in how to make that a successful transition are greatly appreciated!
I read more of the comments already here and they seemed to answer the question. Any other words of advice are wonderful :)
Just pot them up into other pots with compost. Hope this helps. Thanks for watching
Ok that's great! Just keep them from rotting in pots before you plant them out
Nice one Spencer
Thankyou 😀
I got the seeds to sprout but what do I do next?
Where do u keep the seedling when they start growing... How long do they seeds to grow
I just leave them outside.
how long after you took them out of the fridge did they start to sprout?
very helpful, thank you
What do u do with christmas tree seedling in the cold months
Just leave it.they survive in the wild
What do you feed Christmas tree seedling with.. And what month do u plant christmas tree seeds
Just do what I showed in the video and you will be fine
Hello Spencer, last summer i stratified and sprouted spruce seeds in August, and because they were so small when the winter came in December, i brought them inside my house, where they all died of damping off fungus. I have more seeds now (June 2019), but they are not stratified yet. Do you think its too late in the year for me to stratify and plant them? If they are too small when the winter comes, is there a way to stop them from damping off if i was to bring them inside this winter?
No,I have started them at this time and are going to do some more.they are very hardy so you could leave them outside or put them in a cold frame.i just leave mine outside because if you think about it in the wild they just sit there.thanks for watching and the best of luck with your trees
@@spencersnursery1547 Thank you so much Spencer I really appreciate your help🌲
thanks a lot. U r a great teacher...
I got a buzzy seed package as a gift, the pot is 1 inch high, do I need a bigger pot right away so all four seeds don't die on me and have you ever used a pot that small, or germinatated?
They will grow to small seedlings then you can separate and pot them on.hope this helps. Thanks
@@spencersnursery1547 "pot them on" really gets the trees growing into more space I reckon, each their own character. I got the point of what you said, so thanks back.
How can i get seeds in uk ?
Great video
Could you have it indoors?
You can start them indoors but would be impractical to grow a 7ft tree inside
Hi can you give Conifer trees some special food
I found some Norway Spruce tree pine cones in Upper Michigan, near Sault Saint Marie, and I put them in a pot, and soaked them. Would that work as well? Also, how long would they germinate?
How many weeks does the christmas tree seed take to grow and when will I see results. Sally from Sheffield
Few weeks until sprouting
Just plant it and leave it
Do you have to refrigerate it what happens if you don’t ?
Are you supposed to place the bag with the seeds in the fridge or the freezer? I have mountian spruce seeds if thats the correct name in english. Hello from sweden :)
Yes the seeds go in the paper towel in the bag in the fridge (not freezer)hope this helps
@@spencersnursery1547 Thank you! :P
Hi Spencer, thanks for your video. A small question on seed growing - I grow my scots pine seedlings in the small biodegradable cells. I keep them under the sunlight indoors and well watered, but they keep dying. Should I put them in the bigger pot, so the cell can biodegrade and add some fertilizer? Thanks!
It is very interesting and hope the most effective as well. But from where do I get the seeds?
If you dont have any trees to source them from you could just get some if Ebay.
How do you care for them once they are 2"? Mine seem to be stunted and afraid they are dying.
Does it matter what season you start to grow them ?
No not really, but if you are starting them when it's cold make sure to provide them some protection.
Thanks for watching
Hiya, great video. Early this year I used this process to grow some ceder seeds and I've been successful. I have about 10 small trees about 1 inch tall. They've been outside in big tall pots all year (since April). But with winter coming and all the rain weve had this year I've lost a few and now a few more are turning a little brown and look weak and unhealthy. What's the best thing to do. Or should I just leave them to face the winter. Will bringing them in the house help or will the heat kill them. I don't have a green house so not sure what's best. Thanks. Tom
I think it may be them rotting.bringing them indoors may increase the rotting with mire humidity. I have had same problems with young evergreens.best thing j have found is to keep them outside and the frost should harden them up.you may loose a few byt better than losing all of them.hope this helps
Can you plant a christmas tree seed in January... I'm from Sheffield. Sally,
Yes
So yes you can plant a christmas tree seed in Jan or Feb.... What do Conifer s feed on
You don't need to feed them
Do u do the same with blue spuce
Hi can you plant one christmas tree seed or a couple.. Please help
Do any amount it doesnt matter
Brilliant! I know this is quite late, but is there any time of year that's best?
Can you do this anytime of year? 😊
Yes
What kind of grow lights do you use? How many lumens do you use and how many hours do you keep them under the light? How often do you water the seedlings? Do you water them everyday and how much water do you give them?
I just used a grow light garden,only because it was winter at the time but growing them outdoors is fine.i water sparingly as I dont want to rot them,out dont water them at all
Hi. I have put some seeds in the fridge recently. One of them germinated in tissue. And I took it out so as to grow. But left the rest inside the fridge so as to germinate. Do I have to take them out or wait till they germinate?
If they have been in there for the time needed plant them,if not leave them.it doesnt matter too much as long as they have had their dormancy. If they are sprouting they are ready to plant.hope this helps thanks for watching
This was sooooo helpful! Thank you!
you deserve a comment
Thanks for the video. Very interesting. Never thought of growing these at all, though I do like the blue spruce, might give them a go . Would they be ok on a window sill once they have come through the soil?
Thanks again. Nice variety on your channel.
Would recommend more light. I would start mid Feb inside and once they have come up put them in a greenhouse.tgen about March put outside and can then stay outside all year .they are very hardy once they have got a good root system
@@spencersnursery1547 ok thanks. :)
Not sure what part of the world you are from, but have you ever tried growing Frazer firs?
I'm from the UK. Never grown firs but might try them next year
I've a question. I've stratified the magnolia seeds before, though it took around 4months and I did it in a soil fill plastic bags. I guess that paper towel method would work the same way. Just, is there any difference of when to start stratification or not? (By the way I'm going to use grow light). Thank you for a great upload.
Thanks,yes there is a difference, but not much.The paper towel is better in my opinion as they are less likely to rot the seeds.Just keep them moist but not wet.thanks for watching
my favourite way to get conifer seeds to germinate is by sowing in a pot, bury the pot in the corner of a deep bed for the winter ( covered with sharp sand ) an easy form of stratification. then in the spring, I lift the pot and place it in the greenhouse. it works every time, spencer...…………….brian
I am going to do that with my hazelnuts .I just didn't want these seeds to roy nut other seeds are more hardy.thanks
I've done that too.worjs just as good.i did cypress,the common light green one
Great! Are you on Facebook? I'd like to show you some pictures of my Blue Spruce seedling, however, I think it is not a Blue Spruce one. It seems to be some kind of pine. Could you help me identify it?
I don't have face book but do you have Skype? ?
@@spencersnursery1547 , what about on WhatsApp?
@@alexteixeira9816 I don't have WhatsApp. ..
@@alexteixeira9816 I'll make a facebook account and get back to you
@@spencersnursery1547 Thank you very much!
How can I buy that
Hey Spence um just one thing did you know blue spruce and norway spruce aren't the same thing? Love your channel and I'm working on starting my own nursery have you ever though about starting a plant nursery
Why do you put them in the fridge?
Good instructions!
Can I start them in regular potting soil?
Use compost,normal soil from the garden wont drain as well
Please fridge not freezer right?
Where did you get the seeds from?
a website called rp seeds
This is not good whare can we found seed
Is this seed from tree or not
pls tell me where i can buy the seeds
If you cant collect some your own you cand find them on ebay .
안녕하세요 한국에 살고 있어요~ 가문비 색감빠지게 되어 이렇게 정보를 찾아보고있습니다. 한국에는 블루 가문비 (한국 : 은청가문비 ) 정보가 없네요. 후푸시라는 종을 찾는데 그 정보도 찾기 힘드네요 ㅜㅜ // 올려주신 영상에는 번역기가 안되서 영상을 눈으로 배우고 있네요 좋은 정보 감사합니다
Wht happens if u don't put them in the refrigerator
It would lower the chance of germination
I have hundreds of seeds that look like your 6 month growing naturally in my backyard all over. Thinking about potting them and selling them.
great idea go for it!
Can you plant one seed or not
You can do as many as you want.it wont make a difference
In.wich.moth.arocakerya.plants.give.a.saeeds
All I did for Norway Spruce was brought in a couple cones in late fall and put on paper plate. When dried they fall out. Put seeds in plastic bag dry and set in fridge for 1 month. Planted with wing sticking out of soil in a flat and covered with dome. Tada! Problem is is no one tells you how to care for them at 2" tall. They seem to be stunted. Does anyone know? I'm concerned they will dry up. I never was good with indoor Norfolk pines and afraid I may lose the seedlings because no one addresses how to take care of tgem before they go outside to nusery.
What is statfication
The process of which a seed goes through a dormancy period.so we just replicate this in the cold fridge.
Can I grow Nobel fir using the same technique
Listen up look I wanted to grow a pine tree or spruce any type and I was at the river and we were in the woods and I’m only 9 at the time I I did this so my other cousin was 9 my brother is 13 and my other cousin was 11 and I found a baby spruce tree it was like just under one foot tall and I tried to rip it out of the ground in till I did it I trance planted it and it bin one year and it grew quite a bit it’s alive and it is like almost 2 feet now Mabey when I’m older when I move out of my parents house the tree will be big not humongous tho I mabey can take it and trace plant it in my front yard lol 😂
Lol,sounds amazing!
You also may choose to invest 10 minutes a day, reading and practicing your spelling. Yeah, maeby you mitte.
One day when the tree is big he will have discovered paragraph breaks and full stops
I found a spruce pine cone or I should say I pulled a spruce pine cone off of the tree set it on my dashboard in the sunlight which he did it and caused it to drop its seeds I took probably 20 seeds 30 put them in a plastic bag with a damp paper towel no stratification and six weeks later I had for seeds that had begun to be rude or even produce small needlesSo I transferred them to 16 ounce cups with a mixture of topsoil and Pete Moss in them… I will try to update this in a couple of weeks
How did your seeds turn out? So fun..
lit
thanks for watching
I'm thinking about growing Christmas trees I have an acre and I live in Merced California, it's about 103 in the summer and 60 when it's coldest, when would be a good time to start my trees and do they take a lot of watering. can you tell me a little bit about how to start this.
Try starting them in late winter. By the way spruce seeds dont need stratification. Just sow on soil very lightly and keep the soil moist until the seeds germinate
Worst part is obviously summer or dead of winter as it can get really cold in the central valley
not to be rude but how old are you? I was really wondering.
13 then 15 now
Thankyou
So what if I happen to have them grow up all around me, this includes spruces, firs, and pines.....??!?!?! Ok I'm simply kidding ya, but seriously thanks for the lesson!!! 😁😁😁😁
😊😊😊❤❤❤🌲🌲🌲
I often wonder after watching all of this, how in the world do they ever grow naturally 😂
What temperature are you germinating at?
Do you keep christmas tree seedlings outside in the winter...... What time of year do u plant christmas tree seeds