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Fertilising guide

How to fertilise Burrawang (Macrozamia communis)— schedule & NPK

Also called Burrawang, Burrawang Cycad, Common Zamia.

More about burrawang

About Burrawang

Macrozamia communis · also called Burrawang, Burrawang Cycad · tropical

Macrozamia communis is an Australian cycad native to coastal New South Wales, where it grows in dry sclerophyll forest understorey. It tolerates drought, poor soils, and deep shade once established, making it a resilient but very slow-growing ornamental. The single most important care fact is that it needs near-perfect drainage — waterlogged roots rot rapidly, often fatally. Highly toxic to dogs and cats (and humans); all parts contain cycasin and should be kept well away from pets and children.

Growth habit: Clumping rosette cycad with a stout subterranean or low-emergent caudex bearing stiff, arching pinnate fronds.

What fertiliser burrawang actually wants — and why

Burrawang 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 burrawang: 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 burrawang, 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 burrawang:

Apply a slow-release balanced fertiliser (e.g. 10-10-10) once in spring; avoid high-nitrogen feeds that push soft, pest-prone growth. 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 burrawang 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 burrawang

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

Signs you are over-feeding burrawang

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

Signs you are under-feeding burrawang

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

Flushing and leaching the salts

Flush the pot of burrawang 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 burrawang

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 burrawang — frequently asked questions

What fertiliser does burrawang 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. Burrawang 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 burrawang?

Apply a slow-release balanced fertiliser (e.g. 10-10-10) once in spring; avoid high-nitrogen feeds that push soft, pest-prone growth. Apply a slow-release balanced fertiliser (e.g. 10-10-10) once in spring; avoid high-nitrogen feeds that push soft, pest-prone growth. 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 burrawang?

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

What does over-feeding burrawang 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 burrawang 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 burrawang?

Flush the pot of burrawang 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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