Feeding a bonsai tree may seem simple, but it’s one of the most important parts of keeping it healthy and vibrant. These miniature trees live in small pots with limited soil, so nutrients deplete quickly. We feed our bonsai regularly to replace what the roots can’t find naturally, ensuring steady growth, strong foliage, and resistance to pests.
At Miyagi Bonsai, we have fed and maintained bonsai trees for decades. The most consistent observation across that time is that feeding problems fall into two categories: not feeding enough during the growing season, and feeding too much or with the wrong balance during autumn and winter. Getting the seasonal rhythm right accounts for the vast majority of feeding success.
The right fertiliser, applied at the right time, helps balance growth between roots, leaves, and branches. A well-fed bonsai doesn’t just survive, it thrives with colour, strength, and structure that reflect careful attention.
Understanding when and how to feed makes all the difference. Once you know what nutrients your bonsai needs and how often to apply them, caring for it becomes simple and rewarding.
In short: Feed bonsai trees regularly during their growing season using balanced fertiliser. Indoor species need light, year-round feeding, while outdoor bonsai follow a seasonal schedule.
Bonsai feeding schedule overview:
| Bonsai Type | Feeding Frequency | Fertiliser Type |
|---|---|---|
| Indoor (Ficus, Serissa, Chinese Elm) – Spring to Autumn | Weekly | Balanced liquid (e.g. Chrysal Liquid Bonsai Feed) |
| Indoor (Ficus, Serissa, Chinese Elm) – Winter | Every 2–3 weeks | Mild liquid feed |
| Outdoor (Juniper, Pine, Maple, Wisteria) – Spring | Every 2 weeks | High-nitrogen liquid |
| Outdoor (Juniper, Pine, Maple, Wisteria) – Summer | Every 2 weeks | Balanced liquid |
| Outdoor (Juniper, Pine, Maple, Wisteria) – Autumn | Every 1–3 months | Low-nitrogen or phosphorus-rich (e.g. Naruko solid/slow-release) |
| Outdoor (Juniper, Pine, Maple, Wisteria) – Winter | No feeding | N/A |
The best fertiliser depends on your tree’s stage of development and how hands-on you want your care routine to be.
As a general rule: use liquid feed for precise control and developing trees; use Bio-Gold for mature outdoor trees where a steady, low-maintenance approach is preferred. Combining both, liquid during peak growth, pellets as a baseline, is the approach used at Miyagi Bonsai for most established outdoor specimens.
General Rule:
| Tree Type | Fertiliser Type | Frequency | Notes |
|---|---|---|---|
| Developing bonsai | Liquid | Weekly | Use a diluted solution |
| Mature bonsai | Liquid | Every 2 weeks | Maintain steady health |
| All types | Solid (slow-release) | 1–3 times per season | Avoid the hot summer months |
Miyagi Bonsai stocks a carefully chosen range of bonsai fertilisers, including Chrysal Liquid Bonsai Feed and Bio-Gold Original pellets, alongside bonsai trees, pots, and care accessories, with next working day UK delivery available on most orders. The products and recommendations in this guide reflect what we stock, use and see working for our customers every day. We are rated 5 stars across over 100 Google reviews, and our team is on hand by email and phone if you have any questions about bonsai feeding, fertiliser selection, or seasonal care schedules.
Before feeding, it helps to understand a few common questions beginners ask. These short answers cover fertiliser choice, timing, soil, and basic care.
Use a balanced bonsai fertiliser with equal parts nitrogen, phosphorus, and potassium. Feed weekly during the growing season and reduce to every 2–3 weeks in cooler months.
Healthy bonsai show firm, evenly coloured leaves and steady growth. Pale or leggy shoots mean it needs more light; scorched leaves mean too much direct sun.
Yes. Signs of overfeeding include excessive weak growth, yellowing or browning leaf tips, and white salt crust on the soil surface. In severe cases, it causes root burn and wilting. Always err on the side of underfeeding; an underfed tree recovers quickly when feeding resumes; an overfed tree with root burn may require repotting. If in doubt, halve the recommended dose.
Wait four to six weeks before resuming feeding after repotting. Repotting removes part of the root system; applying fertiliser to damaged roots causes further stress and can result in root burn. Water normally during recovery without feeding. Once new growth appears, resume at half strength for the first two to three applications before returning to the normal schedule.
Liquid fertilisers are fast-acting, nutrients reach roots within hours, and allow precise weekly dosage control. Solid or slow-release pellets break down gradually over weeks, requiring only one to three applications per season with no risk of nutrient spikes. Most experienced growers use both: liquid as the primary feed during active growth, with slow-release pellets as a consistent seasonal baseline.
The three most common causes are overwatering (which flushes nutrients and damages roots), incorrect soil pH (which locks nutrients away from roots), and feeding during dormancy (when outdoor species cannot use the nutrients applied). Check soil moisture first; if the substrate stays wet for more than a few days after watering, drainage is the underlying problem rather than nutrition.
Outdoor bonsai, no. Juniper, Pine, and Maple enter dormancy in winter and cannot use nutrients. Feeding encourages soft growth vulnerable to frost. Stop feeding from late autumn until bud movement begins in early spring. Indoor tropical species; yes, but at reduced frequency. Ficus, Serissa, and Carmona do not fully dormant and need feeding every two to three weeks through winter rather than not at all.
The clearest signs of underfeeding are slow or absent growth during the growing season, pale or yellowing foliage without other obvious cause, and reduced vigour compared to previous seasons. In outdoor bonsai, a weak spring bud burst often indicates insufficient autumn nutrition. Recovery is generally quick; most trees respond visibly within two to four weeks of resumed regular feeding.
