Fertilising guide

How to fertilise Loquat (Eriobotrya japonica)— schedule & NPK

Also called Loquat, Japanese medlar, Japanese plum.

More about loquat

About Loquat

Eriobotrya japonica · also called Loquat, Japanese medlar · tropical

Loquat is a subtropical evergreen tree in the rose family, grown for its large leathery leaves and clusters of sweet-tart orange fruit that ripen in late winter to spring. Unusually, it flowers in autumn and fruits in cool months. Hardy to around -10°C as a tree, it is widely grown outdoors in mild regions and as an ornamental elsewhere.

Growth habit: Evergreen tree or large shrub with a rounded, densely leafy crown and big, deeply veined, dark-green leaves felted beneath. Fragrant white flowers open in autumn/early winter in woolly panicles, followed by hanging clusters of fruit.

Watch for — Fireblight: A bacterial disease causing blackened, scorched-looking shoots and dieback. Prune out infected wood well below the damage, disinfecting tools, and avoid heavy nitrogen feeding that fuels soft, susceptible growth.

What fertiliser loquat actually wants — and why

Loquat is a hungry evergreen fruiter with specific needs — a dedicated citrus feed, switched between summer and winter formulas, keeps it cropping and green.

For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for loquat: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.

How often to feed loquat, and which months

Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For loquat:

The dormant-season rule matters more than the exact interval: skip feeding entirely when loquat is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.

What strength to mix for loquat

Follow the citrus-feed label rate for loquat and use the correct seasonal formula. The trace-element content matters as much as the NPK — substituting a general feed is the usual cause of yellowing.

Feeding always goes onto already-damp soil, never dry roots — water loquat first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the loquat watering schedule.

Signs you are over-feeding loquat

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for loquat:

Salt crust on the soil and scorched, browning leaf tips.
Excess soft leafy growth with poor fruit set from too much nitrogen.
Leaf drop shortly after an over-strong feed.

Signs you are under-feeding loquat

Yellowing leaves — overall pale, or yellow between green veins (magnesium/iron).
Poor flowering and fruit set, small or dropping fruit.
Weak new growth and a generally tired tree.

If the symptoms point at watering, light or roots rather than nutrition, the full loquat care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Potted loquat accumulates salts and benefits from a thorough plain-water flush every couple of months until it drains freely, plus an annual repot or top-dressing of fresh citrus compost.

Organic vs synthetic feeds for loquat

Organic options

Well-rotted manure or compost mulch plus seaweed and an Epsom-salts (magnesium) drench supports loquat naturally. UK: organic citrus feed or seaweed + Epsom salts; US: Espoma Citrus-tone or Dr. Earth Citrus.

Synthetic / liquid feeds

A proprietary summer and winter citrus feed — UK: Westland or Vitax Citrus (summer/winter); US: Miracle-Gro or Espoma Citrus. Using the right seasonal formula is the key to keeping loquat green and cropping.

Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.

Fertilising loquat — frequently asked questions

What fertiliser does loquat need?

A specialist citrus fertiliser, which carries the higher nitrogen plus the magnesium, iron and trace elements citrus need — generic feeds quickly leave it yellow and chlorotic. Many ranges have a summer (higher-N) and a winter (lower-N) formula. Loquat is a hungry evergreen fruiter with specific needs — a dedicated citrus feed, switched between summer and winter formulas, keeps it cropping and green.

How often should I feed loquat?

Feed established trees three times a year (late winter, late spring, midsummer) with a balanced fertiliser; citrus or general fruit-tree feeds work well. Avoid excess nitrogen, which promotes leafy growth and increases fireblight susceptibility at the expense of fruit. Feed established trees three times a year (late winter, late spring, midsummer) with a balanced fertiliser; citrus or general fruit-tree feeds work well. Avoid excess nitrogen, which promotes leafy growth and increases fireblight susceptibility at the expense of fruit. In practice: a summer citrus feed regularly (often roughly fortnightly) from spring to autumn, switching to a winter citrus feed at a reduced rate over the colder months — citrus feed year-round, unlike most container plants.

What strength of feed for loquat?

What does over-feeding loquat look like?

Salt crust on the soil and scorched, browning leaf tips. Excess soft leafy growth with poor fruit set from too much nitrogen. Leaf drop shortly after an over-strong feed. Feeding loquat an ordinary plant food instead of a citrus-specific one is the defining mistake — it lacks the magnesium and iron citrus demand, and the leaves yellow between the veins no matter how often you feed.

Should I flush the soil of loquat?