What Does 'Tree' Mean in Bonsai and How Do You Start One?

In bonsai, "tree" means a woody plant kept small in a pot and shaped over years through pruning, wiring, and repotting — not a garden tree planted in the ground. You start by choosing a species suited to your climate and the style you want, then working that material through basic horticulture and styling steps. The Brandywine Bonsai Society, an educational bonsai club, organizes its site around exactly these topics: Styles, Sizes, Species for Bonsai, Urban Collecting, Pruning, Wiring, Repotting, Soil, Horticulture, and Styling.

What "tree" means in bonsai

A bonsai tree is the same species as an ordinary tree; what changes is how it is grown. The pot restricts root room, pruning controls branch and trunk growth, and wiring or clip-and-grow shaping directs the form. The result is a small tree that reads as mature — but it only stays that way with continuing care. Putting a nursery tree into a bonsai pot once does not make it a bonsai.

Choosing the right tree

Two decisions come first: what grows well where you live, and what size and style you want.

• Species: The club's "Species for Bonsai" section is the place to check which trees are used for the hobby. Match species to your local climate before anything else.
• Size: The site separates bonsai by Sizes, so you can pick a scale that fits your space and the time you can give it.
• Style: Styles describes the recognized forms a tree can be trained into, which shapes your choice of starting material.
• Collected material: Urban Collecting covers sourcing trees from urban settings rather than buying nursery stock.

Basic steps to start one

1. Pick your material. Choose a species suited to your climate, at a size and starting form that fits the style you have in mind.
2. Prune. Use the Pruning guidance to remove unwanted growth and begin building structure.
3. Wire. Wiring shapes branches and trunk; the club treats it as its own subject because technique matters.
4. Repot. Repotting keeps roots in check and refreshes the growing medium.
5. Use proper soil. Soil is listed separately because the mix affects water and air at the roots.
6. Style and maintain. Styling and Horticulture cover the ongoing shaping and growing work — this is the part that never really stops.

Where the tree lives

The club separates Philosophy into Outdoors and Indoors, which reflects a real distinction: placement is part of the tree's care, not an afterthought. Related display elements — Stands, Companion Plants, Scrolls, and Stones — are treated as their own topics, so a finished bonsai is more than the tree alone.

Common mistakes

• Treating potting as the finish line. A tree in a pot is the start of shaping, not the end.
• Skipping species fit. A tree that does not suit your climate will not thrive no matter how well it is styled.
• Ignoring the ongoing work. Pruning, wiring, repotting, and soil management are recurring tasks, not one-time steps.

Where to go next

The Brandywine Bonsai Society site is an educational resource and its material may be copied for educational purposes, with attribution requested for large portions. Its Definitions and Links sections are useful for terminology and further reading, and the Newsletters archive (2018–2026) plus show records (Longwood 2005 and 2011, Brandywine 2005, 2009, and 2015) show how trees are developed and displayed over time.