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Fertilising guide

How to fertilise Strawflower (Helichrysum bracteatum)— schedule & NPK

Also called Strawflower, everlasting flower, paper daisy.

More about strawflower

About Strawflower

Helichrysum bracteatum · also called Strawflower, everlasting flower · flowering

An iconic Australian annual grown for its brilliantly coloured, papery bracts in shades of red, orange, yellow, pink, and white. Strawflower is the classic everlasting for dried arrangements, retaining its colour and form indefinitely when cut and hung upside-down to dry. It thrives in full sun, poor soil, and heat.

Growth habit: Upright, branching annual or short-lived perennial in warm climates

What fertiliser strawflower actually wants — and why

Strawflower 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 strawflower: 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 strawflower, 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 strawflower:

Little to no fertiliser is needed or desirable. Excessive fertility reduces flowering and causes floppy stems. In very poor sandy soils, a single low-nitrogen feed at planting is the maximum required. 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 strawflower 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 strawflower

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

Signs you are over-feeding strawflower

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

Signs you are under-feeding strawflower

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

Flushing and leaching the salts

Flush the pot of strawflower 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 strawflower

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 strawflower — frequently asked questions

What fertiliser does strawflower 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. Strawflower 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 strawflower?

Little to no fertiliser is needed or desirable. Excessive fertility reduces flowering and causes floppy stems. In very poor sandy soils, a single low-nitrogen feed at planting is the maximum required. Little to no fertiliser is needed or desirable. Excessive fertility reduces flowering and causes floppy stems. In very poor sandy soils, a single low-nitrogen feed at planting is the maximum required. 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 strawflower?

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

What does over-feeding strawflower 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 strawflower 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 strawflower?

Flush the pot of strawflower 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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