A bonsai is not a dwarf species. It is an ordinary tree — the same one that would reach twenty meters in a forest — kept small through continuous work on its roots and branches. What miniaturizes it is constraint, not genetics.
Starting from a seed rather than an already-trained specimen changes everything: you control the shape from day one, the cost is negligible, and the tree adapts to your conditions from germination onward. In return, you have to accept a timeline measured in years.
Choosing a species
The criterion is not the appearance of the mature tree but the size of its leaves: they become smaller with training, but never enough to make naturally large foliage look proportional.
Reliable choices for beginners
- Japanese maple (Acer palmatum) — the great classic. Fine foliage, spectacular autumn colors, and generous branching. Requires 8 to 12 weeks of cold stratification.
- Japanese privet (Ligustrum japonicum) — probably the most tolerant of them all. Fast-growing and tolerant of pruning and watering mistakes. The best choice for a first attempt.
- Wild olive (Olea europaea sylvestris) — small leaves, a trunk that quickly develops character, and drought tolerance. Excellent in mild climates.
- Barberry (Berberis vulgaris) — hardy, small foliage, interesting bark.
To learn more
- Aleppo pine and Atlas cedar — conifers require a different technique (pinching rather than pruning) but produce the most evocative silhouettes.
- Italian cypress and bald cypress — the latter tolerates waterlogged soil remarkably well, which is rare.
- Ginkgo biloba — unique foliage, golden yellow in autumn. Branching is difficult to densify: this is a bonsai best trained in a simple upright style.
- Chinese redbud — pink flowers on old wood, spectacular. Scarify the seeds before stratification.
- pomegranate — small leaves, bright red flowers, miniature fruits. One of the most accessible fruiting bonsai trees.
- Albizia, jacaranda, royal poinciana — tropical species to grow indoors, with very fine compound foliage.
Naturally broad foliage — magnolia, persimmon, guava — remains disproportionate even after years of defoliation, and species with very long germination times are discouraging before they produce anything. They remain highly worthwhile, but for a second tree.
Step 1 — germination
This is where most attempts fail, and almost always for the same reason: dormancy has not been broken.
- Cold stratification — essential for most temperate species: maple, pine, cedar, dog rose, Chinese redbud. Allow 4 to 12 weeks at 1 to 5 °C, in a moist substrate. The complete method is in Cold stratification.
- Scarification — for seeds with hard coats: Chinese redbud, albizia, flamboyant. Lightly file them or soak them for 24 hours in lukewarm water.
- Constant warmth — for tropical species: jacaranda, flamboyant, guava. Minimum 25 °C.
Sow in deep pots, not shallow trays: these species develop a taproot within the first few weeks, and a shallow container makes it spiral permanently. Well-draining substrate — seed-starting mix lightened with one-third sand or perlite.
Germination of these species takes place over several weeks, and some of the seeds will not sprout until a year later, after a second period of cold. Keep the pots for one more winter, in the shade, and never let them dry out completely: a pot discarded after a month has almost always been discarded too soon.
Step 2 — letting it thicken (years 1 to 3)
This is the most common misconception: wanting to miniaturize the tree immediately. But a thick trunk can only be obtained by letting the tree grow freely. A tree restricted from its first year will remain a twig for life.
During these three years:
- Grow it in a generously sized pot, or even in the ground—this produces the finest trunks, by far.
- Let the shoots grow freely. You will cut them back later; each leaf fuels thickening.
- Only one intervention is useful: at the end of the first year, cut the taproot during the first repotting. This forces the development of fine lateral roots, the basis of the future nebari—the visible root spread at the surface that gives the impression of a firmly anchored tree.
- Outdoors for all temperate species, including in winter. A maple kept indoors will decline—it needs its dormant period.
Years 1 to 3: unrestricted growth, with no shaping. Only one cut during this entire period: cutting the taproot at the end of the first year. Structural pruning begins only between the third and fifth years, once the trunk has finally reached the desired thickness. Restricting the tree earlier does not slow it down; it permanently stunts it.
Step 3 — shaping (from year 3 onward)
Once the trunk has reached the desired thickness, the work changes: reduce and structure it.
Structural pruning
At the end of winter, when there is no frost, before bud break. Remove anything that conflicts with the desired silhouette: crossing branches, branches parallel to the trunk, shoots growing inward, and one of the two branches emerging from the same point.
Maintenance pruning
During the growing season, let the shoot develop five or six leaves, then cut it back to two. Repeated, this action thickens the branching and gradually reduces leaf size. More than anything else, this is what makes a bonsai.
Wiring
Aluminum wire wound in a 45° spiral, without tightening. It guides the branches and trunk while the wood lignifies, then is removed once the shape has been achieved.
The trunk thickens while the wire stays put: eventually it cuts into the wood and leaves a sunken spiral that nothing can erase. Check monthly, and always remove the wire by cutting it piece by piece—unwinding it breaks the branches it was holding.
Repotting
Every two or three years for a young tree, at the end of winter. Untangle the root ball, prune one-third of the roots, and replant in a well-draining substrate. It is this repeated root pruning that keeps the tree small—and forces it to produce the fine feeder roots it depends on.
Routine maintenance
- Watering — this is the critical point. A bonsai pot is shallow and dries out quickly: in summer, often once a day. Water until it drains through the holes, then let the top centimeter dry before watering again.
- Substrate — very well-draining, never potting soil alone. A mix of akadama, pumice, and bark, or, failing that, potting soil diluted by half with coarse sand and pumice.
- Fertilizer — little and often, only during the growing season. A well-draining substrate retains little: small, regular applications are better than a heavy dose.
Maple, pine, cedar, privet: these species need their cold dormancy, and spending a winter in a warm living room exhausts them in one or two seasons. It is the mistake that kills the most gifted bonsai trees. They stay outdoors all year—and what needs protecting from severe frost is the pot, not the tree: roots freeze much faster in a few centimeters of substrate than in the ground.
The actual timeline
| Period | What happens |
|---|---|
| Year 0 | Stratification followed by sowing. Irregular germination |
| Year 1 | Free growth. First repotting at the end of the year, cutting the taproot |
| Years 2–3 | Free growth to thicken the trunk. No shaping |
| Years 3–5 | First structural pruning, beginning wiring |
| Years 5–10 | Refining the branching, reducing the foliage, moving into a bonsai pot |
| Beyond | Maintenance, and the tree continues to improve for decades |
Let’s be clear: a bonsai grown from seed takes five to ten years to look like something. If you want quick results, buy an already-trained tree. If you want a long-term project and a tree that will be entirely yours, sow the seeds.
Frequently asked questions
Can you make a bonsai from any species?
Technically, almost any species, but not all produce a harmonious result. Large-leaved species remain disproportionate, even after years of defoliation. Choose small foliage from the outset.
Do I need an indoor or outdoor bonsai?
Nearly all temperate species are outdoor trees: they need winter cold. Only tropical species — jacaranda, flamboyant, guava, neem — can be kept indoors, where they require plenty of light.
Why are my seeds not germinating?
Nine times out of ten, dormancy has not been broken. Check whether the species requires stratification, scarification, or both. Only then should you consider the temperature and freshness of the seed lot.
When should you move it to a bonsai pot?
Not before the trunk reaches the desired thickness — generally in year five or later. A shallow pot considerably slows thickening: it is an end goal, not a starting point.
Can you harvest seeds from a garden tree?
Yes, and it is an excellent place to start: maple, hornbeam, elm, dog rose. Harvest them when ripe, then sow or stratify them promptly. See How to store your seeds.
How many seeds should you sow?
Several, systematically. The germination rate of these species is often low, and above all: out of ten seedlings, two or three will have an interesting shape or trunk movement. Selection is part of the work.
Key takeaways
First, break dormancy: this is where nine out of ten attempts fail. Then let the tree grow freely for three years — advice that goes against intuition but makes all the difference, because miniaturization only comes later, through repeated pruning and repotting. Start with a Japanese privet or a maple, sow several seeds, and accept the timeline: it is a ten-year project, and that is what makes it worthwhile.
To learn more
- Cold stratification: why and how to germinate seeds?
- How to sow your seeds in cotton, pots or directly in the ground
- Rare and unusual seeds to grow at home
- How to store your seeds from one year to the next
Discover our collection of trees, shrubs and bonsai — species requiring stratification are indicated on each product page.
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