Fertilising guide
How to fertilise Tropical Dewy Pine (Drosophila indica)— schedule & NPK
Also called tropical dewy pine, Indian sundew, tropical sundew.
More about tropical dewy pine
About Tropical Dewy Pine
Drosophila indica · also called tropical dewy pine, Indian sundew · houseplant
A fast-growing annual tropical sundew from Australia, India, and Southeast Asia, producing upright stems to 30 cm clothed in long, glandular leaves that glitter like dewdrops — inspiring the common name. Thrives in very bright, warm, humid conditions. Unlike temperate sundews it needs no dormancy, growing year-round in a warm windowsill or terrarium from seed.
Growth habit: Upright to scrambling annual herb; produces erect or lax stems clothed in strap-like leaves bearing long red glandular tentacles along their margins and upper surface
Watch for — Tap water mineral damage: Even brief use of tap water causes mineral salt build-up in the peat that rapidly kills this species. Flush the medium thoroughly with distilled water if tap water was used accidentally, then resume mineral-free water exclusively.
What fertiliser tropical dewy pine actually wants — and why
Tropical Dewy Pine 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 tropical dewy pine: 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 tropical dewy pine, 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 tropical dewy pine:
Captures its own nutrition via sticky leaves under adequate light. In low-insect indoor conditions, apply dilute urea-free fertiliser (1/4 strength Maxsea) as a foliar spray once every 3–4 weeks during active growth to supplement. 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 tropical dewy pine 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 tropical dewy pine
Half strength is the safe default for tropical dewy pine — 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 tropical dewy pine first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the tropical dewy pine watering schedule.
Signs you are over-feeding tropical dewy pine
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for tropical dewy pine:
- 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 tropical dewy pine
- 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 tropical dewy pine care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of tropical dewy pine 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 tropical dewy pine
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 tropical dewy pine — frequently asked questions
What fertiliser does tropical dewy pine 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. Tropical Dewy Pine 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 tropical dewy pine?
Captures its own nutrition via sticky leaves under adequate light. In low-insect indoor conditions, apply dilute urea-free fertiliser (1/4 strength Maxsea) as a foliar spray once every 3–4 weeks during active growth to supplement. Captures its own nutrition via sticky leaves under adequate light. In low-insect indoor conditions, apply dilute urea-free fertiliser (1/4 strength Maxsea) as a foliar spray once every 3–4 weeks during active growth to supplement. 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 tropical dewy pine?
Half strength is the safe default for tropical dewy pine — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding tropical dewy pine 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 tropical dewy pine 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 tropical dewy pine?
Flush the pot of tropical dewy pine 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
- Tropical Dewy Pine care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water tropical dewy pine — 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 royal purple lilyturf
- How to fertilise fiber optic grass
- How to fertilise chamaedorea microspadix
- All 6887 fertilising guides in the Growli library