Stratify and Germinate Seeds
1-3 monthsCold-stratify species requiring it; sow in seed trays with free-draining mix at correct depth.
Field context
This workflow is part of 3 niche fields
Complete guide for bonsai from seed project — step-by-step workflow, tools, checklist, and expert tips to get started.
Cold-stratify species requiring it; sow in seed trays with free-draining mix at correct depth.
Plant seedlings in ground or large training boxes for 2–3 years to thicken trunk rapidly.
Progressive trunk chops every 1–2 years, each chop slightly above previous to create taper.
After trunk reaches target caliper, root prune and move to bonsai pot; start clip-and-grow ramification.
Monitor trunk taper ratio through progressive chops to achieve natural-looking diameter reduction.
Estimate apparent tree age from trunk diameter for long-term project planning milestones.
Select appropriate training pot size when transitioning from ground growing to container.
Track stratification, germination, and years since trunk chop for project timeline.
Typical milestones by year.
| Year | Action | Trunk Target | Pot |
|---|---|---|---|
| 1 | Germinate, seedling care | 2–3 mm | Seed tray |
| 2–3 | Ground grow, sacrifice branch | 1–3 cm | Training box |
| 4–5 | Trunk chop, first branch select | 3–5 cm | Large training pot |
| 6+ | Ramification, show prep | 5+ cm | Bonsai pot |
Germination rates vary — sow 3× more seeds than trees you want to develop.
One year in the ground equals 3–5 years of pot growth for trunk diameter — patience in ground pays off.
Show-quality bonsai from seed takes 10–15 years minimum — set expectations before starting.