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Pinus Thunbergii Japanese Black Pine Seeds

Pinus Thunbergii Japanese Black Pine Seeds

Regular price $4.00
Regular price Sale price $4.00
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Grow the Pinus Thunbergii Japanese Black Pine seeds to cultivate a bonsai conifer. This species is one of the easier bonsai seed varieties, suitable for gardeners of all levels. To sow, use a 12 Cavity Greenhouse or Planter with Humidity Dome, Soil Pellets or Soil Pods, and Liquid Fertilizer. Pre-soaking and stratification are optional but can improve germination: pre-soak the seeds in room-temperature water for 24 hours, then stratify by placing them in soil or sphagnum moss in a baggie or container and refrigerating for about 1–2 weeks. After that, sow the seeds in a greenhouse and keep warm and brightly lit, acclimating seedlings to full sun gradually or keeping them under grow lights.

These seeds are for the 2026 growing season. Germination time is about 1 month, with a depth of 1/8"–1/4". Spacing should be 1–3 seeds per nursery pot or greenhouse tray cell, and the recommended planter is 2"–4" nursery pot or greenhouse to start (no terra cotta). Time to maturity is several years. Seed prep options include pre-soak, scarification, stratification, or none; sowing method options include greenhouse or paper towel method. Temperature for germination is 70F–85F. Description: tall pine tree with a dark gray trunk and long needles.

📋 Product summary:

  • Pinus Thunbergii Japanese Black Pine seeds for bonsai
  • 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)
  • Seed prep options: pre-soak, scarification, stratification, or none
  • Sowing methods: greenhouse or paper towel method; temperature 70F–85F
  • Sowing setup: 12 Cavity Greenhouse or Planter with Humidity Dome; Soil Pellets or Soil Pods; Liquid Fertilizer
  • Season timing: these seeds are for the 2026 growing season
  • Growth notes: outdoors can reach about 125 ft tall; bonsai form is much smaller

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 

soil 

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

temperature 

warm | cool

pet-friendly

cats | dogs | no

pests

few pests

fertilization

heavy | moderate | light

Quantity

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NATIONWIDE PRODUCT REFUNDS:
The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the order is canceled and the returned product is received and processed.

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