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Pinus Thunbergii 'Japanese Black Pine' Seeds

4 total reviews

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ships in 1-2 business days

We pack and ship orders quickly! Most orders are sent out in 1-2 business days. Read more in our shipping policy here.

30-day returns

If your seeds arrive in poor condition, you are eligible for a free replacement or refund. We want you to be able to enjoy the hobby, and will do everything we can to make sure you're satisfied with our seeds and bulbs! Read more in our refund policy.

1 tan packet of 20 Pinus Thunbergii 'Japanese Black Pine' Bonsai Seeds (care guide included)

Pinus Thunbergii

About the seeds:


beginner | intermediate | advanced

germination time

1 month




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


greenhouse | paper towel method


70F - 85F

About the Plants:


tall pine tree, dark gray trunk with long needles


beginner | intermediate | advanced

growth speed

slow | medium | fast

size of plant

outdoors 125ft tall. As a bonsai, much smaller. 


full sun | partial sun | shade | grow lights 


well-draining coconut coir/peat-based or bonsai potting mix


warm | cool


cats | dogs | no


few pests


heavy | moderate | light



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 2024 growing season.

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Pinus Thunbergii &
Pinus Thunbergii &
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Customer Reviews

Based on 4 reviews
They are seeds to plant

They are seeds to plant

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Pinus Thunbergii 'Japanese Black Pine' Seeds

when you order with us:

  • your seeds and orders are hand-packed in San Diego

  • your order ships in 1-2 business days

  • free replacements for seeds that arrive in bad condition

  • we're always here to help with any questions!


how difficult are these seeds to grow?

Houseplant seeds are generally trickier to grow than your more common garden seed varieties- they require a specific setup and more time to sprout. You can find the difficulty for each seed variety specified under the "about the seeds" tab on each product page.

We definitely recommend following the setups outlined in our seed guide here, and you can find further details in our blog!

how long does it take for the seeds to germinate?

Houseplant seeds take longer than most seeds to germinate, the average time for germination is 2-3 weeks. If you're curious about the sprouting time for a specific seed variety, you can find that information in the "about the seeds" tab on each product page.

how do I grow houseplant seeds?

All of our orders come with a basic starter guide for you to follow, but our seed guide here goes in much more detail and also offers alternative seed starter methods.

We also include additional planting tips specific to each seed variety under the "instructions" tab of each product page. If you need extra help, don't hesitate to reach out to us at!

my seeds aren't germinating, what do I do?

Houseplant seeds are tricky, and sometimes certain more difficult varieties can take some practice to finally get them to sprout!

If you're having trouble with the seeds, you're not alone. Luckily there are ways to sometimes salvage seeds by adjusting the setup- this quiz can help diagnose any issues you may have with your setup and make suggestions for how to improve it.

You can also email us at and we can help out! If the seeds still aren't germinating, we'll send out a replacement :)