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pine tree bonsai from seed Pinus Thunbergii 'Japanese Black Pine' SeedsGrow the quintessential coniferous bonsai tree with these Pinus Thunbergii seeds! The Japanese Black Pine is one of the easier bonsai seed varieties to grow, perfect for gardeners of all levels. Instructions: We recommend using the following to sow the seeds: 12 Cavity Greenhouse or Planter with Humidity Dome Soil Pellets or Soil Pods Liquid Fertilizer Pre soaking and stratification is option, but helps with germination. Pre soak by placing the seeds
Grow the quintessential coniferous bonsai tree with these Pinus Thunbergii seeds! The Japanese Black Pine is one of the easier bonsai seed varieties to grow, perfect for gardeners of all levels.
We recommend using the following to sow the seeds:
Pre-soaking and stratification is option, but helps with germination. Pre-soak by placing the seeds in room temperature-warm water for 24 hours. Stratify by placing in soil or sphagnum moss in a baggie or tupperware container and placing the container in a fridge for ~1-2 weeks. From there, sow the seeds in a greenhouse and keep warm and brightly lit. Acclimate seedlings to full sun gradually, or keep under grow lights.
(Find more info on germinating seeds by going to our seed guide)
These seeds are for the 2026 growing season.
|
difficulty |
beginner | intermediate | advanced |
|
germination time |
1 month |
|
depth |
1/8"-1/4” |
|
spacing |
1-3 seeds per nursery pot or greenhouse tray cell |
|
recommended planter |
2"-4" nursery pot or greenhouse to start (no terra cotta) |
|
time to maturity |
several years |
|
seed prep |
pre-soak | scarification | stratification | none |
|
method |
greenhouse | paper towel method |
|
temperature |
70F - 85F |
|
description |
tall pine tree, dark gray trunk with long needles |
|
difficulty |
beginner | intermediate | advanced |
|
growth speed |
slow | medium | fast |
|
size of plant |
outdoors 125ft tall. As a bonsai, much smaller. |
|
light |
full sun | partial sun | shade | grow lights |
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soil |
well-draining coconut coir/peat-based or bonsai potting mix |
|
temperature |
warm | cool |
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pet-friendly |
cats | dogs | no |
|
pests |
few pests |
|
fertilization |
heavy | moderate | light |