How to care for a bonsai at home by plant type: Polyscias, Pachira, and Portulacaria

Deco Garden Practical Guide

Bonsai is a cultivation and styling method, not the name of a specific plant. Polyscias, Pachira, and Portulacaria may be sold with a similar compact appearance, but they do not require the same light, soil, or watering. Always identify the plant first, then provide the appropriate care.

“Bonsai” describes the growth style, not standardized care instructions

According to the Royal Horticultural Society, bonsai is the art of growing trees and shrubs on a small scale through training, pruning, and container restriction. Therefore, the word in the product name does not replace the species name. For example, a tropical Polyscias, a Pachira from humid forest regions, and a succulent Portulacaria will each react differently to the same watering regimen.

Three products, three different needs

For plants checked in-store

Polyscias Fabian Bonsai look, 12cm pot Braided Pachira Compact look, 12cm pot Portulacaria afra Available in 12 or 20cm

Watering and soil: Don’t copy schedules from other plants

Frequency varies by season, light, container volume, air circulation, and soil composition. Therefore, do not water on a fixed day just because a general chart suggests it.

When to repot — and when not to

Do not automatically repot a new plant or prune roots just because of the word “bonsai.” Check if water is no longer absorbing evenly, if roots are filling the container or coming out of the drainage holes, and if the soil has broken down and lost aeration. The RHS notes that in traditional bonsai, root pruning and repotting depend on the growth rate and species.

• Container with drainage: Essential for all three plants.
• Size: Choose a container that holds the root ball without excessive extra volume; there is no universal pot-size upgrade that fits all.
• Root pruning: An advanced practice that depends on the species. For young decorative plants, you can often move them to a new pot without turning them into a traditional bonsai.
• After repotting: Maintain stable conditions and avoid further fertilizing until the plant resumes growth, according to the product label.

Pruning and fertilizing: Clean tools, small cuts, precise dosage

For maintenance pruning, use sharp, clean bypass pruners. Dull blades can crush tissue, and tools that haven't been cleaned can transfer issues between plants. Start with damaged branches and growth that disrupts the form, and monitor the plant’s reaction before pruning further.

Fertilizer is not a cure for yellowing leaves or root rot. Only fertilize a healthy plant in active growth, following the label on the bottle. For Polyscias and Pachira in bonsai style, you can choose specialized bonsai fertilizer. For Portulacaria, which is a succulent, a cactus and succulent fertilizer is appropriate. If the soil is already pre-fertilized, do not add more without checking the soil instructions.

Frequently asked questions

Is every small plant with a thick trunk a bonsai?

No. Sometimes it is just a young plant or one styled to look like a bonsai. Proper care starts with the botanical name and the plant's structure, not just its shape.

Are Portulacaria and Pachira the same “Money Tree”?

No. Pachira is Pachira aquatica, which has large, palm-like leaves. Portulacaria is Portulacaria afra, which has small, fleshy leaves. The trade name is similar, but the watering needs are very different.

The leaves are yellowing. Should I add fertilizer?

Not immediately. First, check for overwatering, drainage issues, light, and root health. Fertilizing a plant already suffering from overwatering can add more stress instead of solving the cause.

Can I use a pot without a drainage hole?

Only use it as a decorative cover pot: the plant must remain in a draining nursery pot inside, watered outside the cover pot and returned only after all excess water has drained away.