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Fertilising guide

How to fertilise Prunus subhirtella 'Autumnalis' (Prunus subhirtella 'Autumnalis')— schedule & NPK

Also called Autumn Cherry, Winter Cherry.

More about prunus subhirtella 'autumnalis'

About Prunus subhirtella 'Autumnalis'

Prunus subhirtella 'Autumnalis' · also called Autumn Cherry, Winter Cherry · flowering

Prunus subhirtella 'Autumnalis' is the winter-flowering cherry, valued for semi-double white blooms that open in flushes from late autumn through mild spells into early spring. A graceful, spreading small tree, it brings flower to the dormant season, follows with bronze new leaves and good autumn tints, and suits lawns and mixed borders.

Growth habit: Small deciduous tree with a rounded, spreading, somewhat open crown and slender twigs; moderate growth rate and a graceful, airy outline.

What fertiliser prunus subhirtella 'autumnalis' actually wants — and why

Prunus subhirtella 'Autumnalis' is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.

A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.

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 prunus subhirtella 'autumnalis': 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 prunus subhirtella 'autumnalis', 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 prunus subhirtella 'autumnalis':

Apply a balanced fertiliser in early spring and mulch with compost; trees in good soil need little feeding. Avoid high-nitrogen feeds that produce soft growth vulnerable to canker. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.

The dormant-season rule matters more than the exact interval: skip feeding entirely when prunus subhirtella 'autumnalis' 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 prunus subhirtella 'autumnalis'

Half strength is the safe default for prunus subhirtella 'autumnalis' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

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

Signs you are over-feeding prunus subhirtella 'autumnalis'

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

Signs you are under-feeding prunus subhirtella 'autumnalis'

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

Flushing and leaching the salts

Flush the pot of prunus subhirtella 'autumnalis' with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.

Organic vs synthetic feeds for prunus subhirtella 'autumnalis'

Organic options

A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.

Synthetic / liquid feeds

A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.

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 prunus subhirtella 'autumnalis' — frequently asked questions

What fertiliser does prunus subhirtella 'autumnalis' need?

A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Prunus subhirtella 'Autumnalis' is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.

How often should I feed prunus subhirtella 'autumnalis'?

Apply a balanced fertiliser in early spring and mulch with compost; trees in good soil need little feeding. Avoid high-nitrogen feeds that produce soft growth vulnerable to canker. Apply a balanced fertiliser in early spring and mulch with compost; trees in good soil need little feeding. Avoid high-nitrogen feeds that produce soft growth vulnerable to canker. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.

What strength of feed for prunus subhirtella 'autumnalis'?

Half strength is the safe default for prunus subhirtella 'autumnalis' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding prunus subhirtella 'autumnalis' look like?

Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding prunus subhirtella 'autumnalis' year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.

Should I flush the soil of prunus subhirtella 'autumnalis'?

Flush the pot of prunus subhirtella 'autumnalis' with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.

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