Fertilising guide
How to fertilise White-Budded Sundew (Drosera leucoblasta)— schedule & NPK
Also called White-budded sundew, Pygmy sundew.
More about white-budded sundew
About White-Budded Sundew
Drosera leucoblasta · also called White-budded sundew, Pygmy sundew · houseplant
Drosera leucoblasta is a pygmy sundew endemic to south-western Western Australia, where it grows in clayey sand and laterite soils in open heathland from the Darling Scarp east through the Wheatbelt to Esperance. Its common name references the distinctive white stipular buds (leucos = white, blastos = bud) at the centre of the rosette. The most important care fact is that it requires mineral-poor, very well-draining soil and pure, low-mineral water — tap water will kill it. It is not listed on the ASPCA toxic plant database and is considered mildly-toxic by precaution, though no serious toxicity to pets is reported.
Growth habit: Flat rosette, pygmy form, reaching 2-3 cm in diameter; produces geometric clusters of gemmae at the rosette centre each autumn.
What fertiliser white-budded sundew actually wants — and why
White-Budded Sundew is feeding to flower, not to grow leaves — it needs a higher-phosphorus / specialist bloom feed, given little and often, to set and hold its display.
A higher-phosphorus "bloom" formula or a species-specific feed (orchid food, African violet food, or a tomato-style high-potash/phosphorus liquid). A high-nitrogen general feed gives you lush leaves and almost no flowers.
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 white-budded sundew: 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 white-budded sundew, 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 white-budded sundew:
Does not need fertiliser; supplement only if kept insect-free by placing a tiny pinch of dried Daphnia or diluted quarter-strength foliar orchid feed on leaves once a month during the growing season. The pattern that matters: feed little and often through active growth and budding — once a month — and ease right off during the rest period that triggers the next flush.
The dormant-season rule matters more than the exact interval: skip feeding entirely when white-budded sundew 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 white-budded sundew
Very dilute — quarter strength, the classic "weakly, weekly" approach for white-budded sundew. These plants have fine roots that scorch easily and a steady trickle beats an occasional strong dose for flowering.
Feeding always goes onto already-damp soil, never dry roots — water white-budded sundew first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the white-budded sundew watering schedule.
Signs you are over-feeding white-budded sundew
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for white-budded sundew:
- Lush green leaves but few or no flowers (too much nitrogen).
- Brown, scorched leaf tips and edges — a classic fine-root burn.
- White salt crust on the medium or pot, and stalled buds.
- Bud blast: buds forming then shrivelling and dropping.
Signs you are under-feeding white-budded sundew
- Sparse or no flowering despite good light and the right season.
- Smaller, paler new leaves and a generally weak, tired plant.
- Flowers that are smaller or fade faster than they should.
If the symptoms point at watering, light or roots rather than nutrition, the full white-budded sundew care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Specialist and bloom feeds leave salts that scorch fine roots — flush white-budded sundew thoroughly with plain water until it runs clear every 4-6 weeks in the feeding season, and always between feeds for orchids.
Organic vs synthetic feeds for white-budded sundew
Organic options
Gentler options exist: a dilute seaweed feed (mildly potassium-rich) or worm-casting tea. UK: Westland seaweed, or a dilute tomato feed like Tomorite for bud-formers; US: Espoma Orchid! / Violet! or Neptune's Harvest. Lower burn risk, slower response.
Synthetic / liquid feeds
A species-matched bloom feed at quarter strength — UK: Baby Bio Orchid / African Violet food, or a high-potash Tomorite/Phostrogen for budding bloomers; US: Miracle-Gro Orchid or Bloom Booster, Schultz African Violet.
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 white-budded sundew — frequently asked questions
What fertiliser does white-budded sundew need?
A higher-phosphorus "bloom" formula or a species-specific feed (orchid food, African violet food, or a tomato-style high-potash/phosphorus liquid). A high-nitrogen general feed gives you lush leaves and almost no flowers. White-Budded Sundew is feeding to flower, not to grow leaves — it needs a higher-phosphorus / specialist bloom feed, given little and often, to set and hold its display.
How often should I feed white-budded sundew?
Does not need fertiliser; supplement only if kept insect-free by placing a tiny pinch of dried Daphnia or diluted quarter-strength foliar orchid feed on leaves once a month during the growing season. Does not need fertiliser; supplement only if kept insect-free by placing a tiny pinch of dried Daphnia or diluted quarter-strength foliar orchid feed on leaves once a month during the growing season. The pattern that matters: feed little and often through active growth and budding — once a month — and ease right off during the rest period that triggers the next flush.
What strength of feed for white-budded sundew?
Very dilute — quarter strength, the classic "weakly, weekly" approach for white-budded sundew. These plants have fine roots that scorch easily and a steady trickle beats an occasional strong dose for flowering.
What does over-feeding white-budded sundew look like?
Lush green leaves but few or no flowers (too much nitrogen). Brown, scorched leaf tips and edges — a classic fine-root burn. White salt crust on the medium or pot, and stalled buds. Bud blast: buds forming then shrivelling and dropping. Using an ordinary high-nitrogen houseplant feed on white-budded sundew is the headline mistake — you get a healthy-looking plant that simply refuses to bloom. The second is feeding through the rest period and breaking the dormancy cue it needs to set buds.
Should I flush the soil of white-budded sundew?
Specialist and bloom feeds leave salts that scorch fine roots — flush white-budded sundew thoroughly with plain water until it runs clear every 4-6 weeks in the feeding season, and always between feeds for orchids.
Keep reading
- White-Budded Sundew care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water white-budded sundew — 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 lady in red fern
- How to fertilise wart fern
- How to fertilise wallichiana fern
- All 10153 fertilising guides in the Growli library