Hamilton's spindletree

Hamilton's spindletree key facts

Growing Difficulty

Beginner-friendly

Lifespan

Little data on lifespan

Size

Usually about 3 m, occasionally up to 15 m

Watering

Fertilizer (late Feb–early March, then April–August after fruit set; stop from September)

Light & placement

A forest-edge tree suited to part shade. Shade it from afternoon sun in summer, then give full sun from September for autumn colour and fruit

Watering

Very thirsty: twice daily in spring/autumn, 2–3 times in summer, every 2 days in winter. Uptake slows after mid-July, so check dryness. Keep water off flowers

Temperature & overwintering

Cold-hardy, but its sappy wood is prone to winter dieback and frozen roots—protect it in a cold frame after leaf fall

Soil & repotting

Roots fill the pot within a year. Repot in mid-March or September: yearly for young trees, every 1–2 years for mature ones

Fertilizer

Feed fruiting trees generously, adding bone meal to oilcake for phosphorus. Stop in September so the fruit colours

Pruning & styling

Leave vigorous shoots for a while to build up short fruiting spurs, then cut them in early August to early September. Little fine pinching is needed

Pests & cautions

Watch for aphids, lace bugs, scale and leaf rollers. Keep a male tree for pollination; fruiting every year weakens the tree. Seeds are toxic

About Hamilton's spindletree

Mayumi is a deciduous spindle tree whose pale pink fall fruit splits open to reveal red seeds, with vivid autumn leaves. Beginner-friendly, though a male tree is needed nearby for reliable fruiting.

7 things to know before growing Hamilton's spindletree

1. 1Partial Shade to Bright Shade

   Mayumi naturally grows along forest edges, so partial shade to bright shade suits it. In summer, use shade cloth to protect it from afternoon sun and leaf scorch. From September on, give it plenty of sun to bring out autumn color and help the fruit color up.

2. 2Watering Basics

   Water thoroughly once the soil surface has dried, which is the general rule for this species. It dries out faster during the spring-to-fall growing season, so watch for underwatering, while lighter watering is fine once the leaves have dropped.

3. 3Choosing Soil

   Choose a soil mix that balances drainage with water retention. A standard bonsai mix based on akadama with some leaf mold works well for mayumi.

4. 4When to Repot

   Mayumi's roots grow quickly and can fill a pot within a year. Repot young trees every year and mature trees every one to two years. The best times are mid-March or September.

5. 5Seasonal Pruning

   Trimming unwanted branches while the tree is bare in the dormant season helps shape next year's form, foliage color, and fruiting. During the growing season, trim back overly long shoots as needed to maintain the silhouette.

6. 6Picking Male vs. Female

   Mayumi is dioecious, so if you want reliable fruiting you'll need both a female tree and a male tree nearby for pollination. Confirming which sex a tree is at the time of purchase can save you from being surprised later when a female tree alone fails to fruit.

7. 7Enjoying Foliage and Fruit

   In autumn mayumi offers both colorful foliage and fruit that splits into four sections to reveal red seeds inside. Keeping up with the basics — good light and air circulation — helps bring out strong autumn color and a good fruit set.

Frequently asked questions about Hamilton's spindletree

Q.Is mayumi easy to grow for beginners?

A.Mayumi is generally considered a beginner-friendly species. As long as you keep up with basic light and watering care, it's manageable even for those new to bonsai.

Q.How do I get mayumi to fruit every year?

A.Because mayumi is dioecious, a female tree alone often won't set fruit reliably. Keeping a male tree nearby for pollination makes fruiting more consistent.

Q.How large does mayumi grow?

A.As a bonsai or garden tree, mayumi typically stays around 3 meters tall. In rare cases it can grow as tall as about 15 meters.

Q.When is the best time to repot mayumi?

A.Repot in mid-March or in September. The roots grow fast enough to fill the pot within a year, so repot young trees every year and mature trees every one to two years.

Q.Can I enjoy both autumn leaves and fruit at the same time?

A.Yes, mayumi offers both attractive autumn foliage and fruiting at the same time of year. As the fruit ripens it splits into four sections to reveal red seeds inside, adding to the seasonal display alongside the leaf color.

Handy Growing Tools for Hamilton's spindletree

Learn more about Hamilton's spindletree in the encyclopedia

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