Fertilising guide
How to fertilise Pinwheel Flower (Tabernaemontana divaricata)— schedule & NPK
Also called Pinwheel Flower, Crape Jasmine, East Indian Rosebay, Nero's Crown.
More about pinwheel flower
About Pinwheel Flower
Tabernaemontana divaricata · also called Pinwheel Flower, Crape Jasmine · tropical
A fragrant evergreen shrub from South and Southeast Asia bearing pure-white, pinwheel-shaped blooms almost year-round. Thrives in bright indirect to part-sun conditions with consistently moist, well-drained soil. Makes an outstanding container plant indoors in cooler climates. Highly scented, especially at night.
Growth habit: Upright, multi-stemmed evergreen shrub with a rounded, bushy crown
What fertiliser pinwheel flower actually wants — and why
Pinwheel Flower 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 pinwheel flower: 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 pinwheel flower, 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 pinwheel flower:
Feed monthly during spring and summer with a balanced liquid fertiliser (e.g. 10-10-10). Reduce to every 6–8 weeks in autumn; withhold in winter. A bloom-booster (low nitrogen, high phosphorus) in late winter can encourage heavier flowering. Treat that as monthly 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 pinwheel flower 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 pinwheel flower
Half strength is the safe default for pinwheel flower — 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 pinwheel flower first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the pinwheel flower watering schedule.
Signs you are over-feeding pinwheel flower
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for pinwheel flower:
- 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.
Signs you are under-feeding pinwheel flower
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full pinwheel flower care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of pinwheel flower 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 pinwheel flower
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 pinwheel flower — frequently asked questions
What fertiliser does pinwheel flower 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. Pinwheel Flower 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 pinwheel flower?
Feed monthly during spring and summer with a balanced liquid fertiliser (e.g. 10-10-10). Reduce to every 6–8 weeks in autumn; withhold in winter. A bloom-booster (low nitrogen, high phosphorus) in late winter can encourage heavier flowering. Feed monthly during spring and summer with a balanced liquid fertiliser (e.g. 10-10-10). Reduce to every 6–8 weeks in autumn; withhold in winter. A bloom-booster (low nitrogen, high phosphorus) in late winter can encourage heavier flowering. Treat that as monthly 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 pinwheel flower?
Half strength is the safe default for pinwheel flower — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding pinwheel flower 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 pinwheel flower 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 pinwheel flower?
Flush the pot of pinwheel flower 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.
Keep reading
- Pinwheel Flower care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water pinwheel flower — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise calico flower
- How to fertilise flame vine
- How to fertilise cape honeysuckle
- All 6887 fertilising guides in the Growli library