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Fertilising guide

How to fertilise Pheasant's Tail Grass (Anemanthele lessoniana)— schedule & NPK

Also called Pheasant's tail grass, New Zealand wind grass, Gossamer grass.

More about pheasant's tail grass

About Pheasant's Tail Grass

Anemanthele lessoniana · also called Pheasant's tail grass, New Zealand wind grass · flowering

Anemanthele lessoniana is an elegant, evergreen bunchgrass native to New Zealand, renowned for its fine, arching leaves that shift from green to rich orange, red, and bronze tones in autumn and winter — the most ornamental cool-season display of any temperate grass. It prefers full sun to partial shade in free-draining soil and is tolerant of coastal winds and mild frost. The most important care fact is that it is evergreen and should only be lightly combed through, not cut hard back, or it will not recover. Not listed as toxic; considered pet-safe.

Growth habit: Evergreen, compact bunchgrass with gracefully arching, very fine-textured foliage; produces feathery, reddish-purple flower panicles from midsummer to autumn.

What fertiliser pheasant's tail grass actually wants — and why

Pheasant's Tail Grass 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 pheasant's tail grass: 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 pheasant's tail grass, 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 pheasant's tail grass:

Apply a low-nitrogen slow-release fertiliser (e.g., 5-10-10) in spring; excess nitrogen produces overly lush green growth that suppresses the characteristic autumn colour change. 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 pheasant's tail grass 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 pheasant's tail grass

Half strength is the safe default for pheasant's tail grass — 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 pheasant's tail grass first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the pheasant's tail grass watering schedule.

Signs you are over-feeding pheasant's tail grass

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for pheasant's tail grass:

Signs you are under-feeding pheasant's tail grass

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

Flushing and leaching the salts

Flush the pot of pheasant's tail grass 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 pheasant's tail grass

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 pheasant's tail grass — frequently asked questions

What fertiliser does pheasant's tail grass 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. Pheasant's Tail Grass 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 pheasant's tail grass?

Apply a low-nitrogen slow-release fertiliser (e.g., 5-10-10) in spring; excess nitrogen produces overly lush green growth that suppresses the characteristic autumn colour change. Apply a low-nitrogen slow-release fertiliser (e.g., 5-10-10) in spring; excess nitrogen produces overly lush green growth that suppresses the characteristic autumn colour change. 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 pheasant's tail grass?

Half strength is the safe default for pheasant's tail grass — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding pheasant's tail grass 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 pheasant's tail grass 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 pheasant's tail grass?

Flush the pot of pheasant's tail grass 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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