Japanese Black & Red Pines from seeds

Discussion in 'Gymnosperms (incl. Conifers)' started by ChrisUk, Sep 27, 2021.

  1. ChrisUk

    ChrisUk Member

    Messages:
    48
    Likes Received:
    94
    Location:
    Bristol, England
    Hi,

    I've been growing some Japanese black pines and Japanese red pines from seed this year, and there now are 2 to 3 inches tall, as you can see in the photos

    Since that's the first time I do this I was wondering:

    1/ Do you think it's time for me to repot or slip pot them into bigger pots?
    2/ As Autumn and Winter are coming, what is the best way to protect them over winter?

    Many thanks,
    Chris
     

    Attached Files:

  2. Daniel Mosquin

    Daniel Mosquin Paragon of Plants UBC Botanical Garden Forums Administrator Forums Moderator 10 Years

    Messages:
    10,334
    Likes Received:
    468
    Location:
    Vancouver, British Columbia, Canada
  3. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

    Messages:
    11,042
    Likes Received:
    300
    Location:
    Britain zone 8/9
    Bigger pots wouldn't hurt. The pot with 2 seedlings in, it is probably too late to separate them now, you'll have to resign yourself to losing (culling) one of the seedlings.

    Bristol has mild winters, far warmer than in their native areas, so winter cold won't be a problem. Just keep them outdoors where they'll be safe from animals that might damage them (deer, rabbits, squirrels, etc.).
     
    ChrisUk likes this.
  4. ChrisUk

    ChrisUk Member

    Messages:
    48
    Likes Received:
    94
    Location:
    Bristol, England
    Thank you Michael

    Since it's really wet in Winter over here, is it best to make sure they're a bit sheltered from most of the rain, so that their roots don't rot?
     
  5. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

    Messages:
    11,042
    Likes Received:
    300
    Location:
    Britain zone 8/9
    Not sure! Certainly don't let them get flooded. I doubt rain draining through will hurt them much.
     
    ChrisUk and maf like this.
  6. maf

    maf Generous Contributor Maple Society 10 Years

    Messages:
    1,648
    Likes Received:
    525
    Location:
    Northamptonshire, England
    While winter is technically the driest season in (fairly large) parts of Japan, there is still plenty of precipitation during this season and would not be that much less than Bristol, if at all. As Michael says, rain draining through a suitable medium shouldn't be a concern.
     
    ChrisUk likes this.
  7. ChrisUk

    ChrisUk Member

    Messages:
    48
    Likes Received:
    94
    Location:
    Bristol, England
    Thank you @maf and @Michael F for the information!

    I've now slip-potted them in slightly bigger pots, in a mix of compost and perlite (which is also the same medium as what they grew in). That should now be fine for drainage. Their roots started circling a bit at the bottom of the pots (even if the rest of the roots didn't fill the pots0

    I'll have to move them into a safer area as I noticed this morning a squirrel dug again in several of my potted maple trees....
     
    maf likes this.

Share This Page