Fertilising guide

How to fertilise Bird of paradise (Strelitzia reginae)— schedule & NPK

Also called crane flower, Strelitzia.

About Bird of paradise

Strelitzia reginae · also called crane flower, Strelitzia · flowering

Bird of paradise is a striking South African banana relative grown for its paddle leaves and crane-shaped orange flowers. Indoors it grows to roughly 1.5-2 m and needs the brightest spot in the house. Mildly toxic to pets.

Strelitzia reginae is endemic to the Eastern Cape and KwaZulu-Natal of South Africa, where it grows in coastal bush, riverbanks and clearings. Its rigid beak-like spathe sits perpendicular to the stem to form a durable perch for the sunbirds that pollinate it.

A heavy feeder when actively growing; balanced fertiliser through spring and summer fuels both the large paddle leaves and the energy-expensive crane flowers, with feeding withheld over winter.

Growth habit: Clumping evergreen with paddle leaves

Watch for — Brown leaf edges: Low humidity or salt build-up from tap water and fertiliser.

Sources: aspca.org, hort.extension.wisc.edu, en.wikipedia.org, powo.science.kew.org

What fertiliser bird of paradise actually wants — and why

Bird of paradise is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom.

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 bird of paradise: 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 bird of paradise, 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 bird of paradise:

Balanced feed at half strength every 4 weeks during the growing season; potassium-heavy feed once a year encourages flowering. For a hungry bloomer that means feeding regularly — every 4 weeks — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

The dormant-season rule matters more than the exact interval: skip feeding entirely when bird of paradise 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 bird of paradise

Follow the flowering-feed label rate for bird of paradise, or half strength if feeding very frequently. These plants genuinely use the nutrients — under-feeding shows up fast as a thin display.

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

Signs you are over-feeding bird of paradise

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

Lots of lush leaves but few flowers (too much nitrogen).
Scorched leaf edges and salt crust from too-strong or too-frequent feeds.
Soft, sappy growth prone to aphids and mildew.

Signs you are under-feeding bird of paradise

Sparse, small, short-lived flowers and pale foliage.
A tired plant that stops blooming early in the season.
Weak growth and poor repeat-flowering after the first flush.

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

Flushing and leaching the salts

Container-grown bird of paradise accumulates feed salts fast with frequent feeding — water until it drains each time and flush pots with plain water every few weeks to prevent scorch.

Organic vs synthetic feeds for bird of paradise

Organic options

A liquid comfrey or seaweed feed (naturally potassium-rich) plus compost or well-rotted manure as a mulch. UK: comfrey feed, organic Tomorite, or rose feed; US: Espoma Rose-tone or Neptune's Harvest. Feeds and improves soil.

Synthetic / liquid feeds

A high-potash flowering feed on a regular cadence — UK: Tomorite (Levington), Phostrogen or a specialist rose feed; US: Miracle-Gro Bloom Booster or a rose food. Fast, reliable bloom response.

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 bird of paradise — frequently asked questions

What fertiliser does bird of paradise need?

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom. Bird of paradise is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

How often should I feed bird of paradise?

Balanced feed at half strength every 4 weeks during the growing season; potassium-heavy feed once a year encourages flowering. Balanced feed at half strength every 4 weeks during the growing season; potassium-heavy feed once a year encourages flowering. For a hungry bloomer that means feeding regularly — every 4 weeks — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for bird of paradise?