🌿 Drosera spiralis Care Sheet
🧬 Overview
Drosera spiralis is a striking, rosette-forming sundew from the Drosera villosa complex, native to the highlands of Brazil. Known for its upright, spiraling leaves and deep red coloration under strong light, this species demands cool, bright, and airy conditions. It’s a showstopper but not for beginners — success lies in keeping its roots cool and its crown dry.
☀️ Light
Requirement: Bright light to full sun.
Ideal: 12–14 hours of strong artificial light or a north/east-facing window in South Africa.
Result: Red coloration and compact, upright leaves.
Warning: Low light = floppy, green growth and eventual decline.
🌡️ Temperature
Day: 20–26 °C
Night: 10–16 °C
Prefers a cool drop at night — mimicking its highland origin.
Constant warmth (>28 °C) stresses the plant and can cause root rot.
💡 Tip: Place pot over damp perlite or near a fan for air movement and evaporative cooling.
💧 Water
Use pure water only (RO, distilled, or rainwater).
Keep substrate moist but not waterlogged.
Avoid standing water for long periods — roots dislike stagnant conditions.
Occasional top watering helps prevent mineral buildup.
🌬️ Humidity & Airflow
Humidity: 60–80 %
Airflow: Essential — stagnant, overly damp air promotes crown rot.
Best in open terrariums or near a gentle fan.
🌱 Substrate
Mix:
2 parts sphagnum moss (live or long-fiber)
1 part perlite or silica sand
Must be acidic and low in nutrients.
Keep airy — D. spiralis hates compacted, soggy soil.
🪴 Potting
Use tall pots (10–12 cm deep) — the species forms long, delicate roots.
Plastic or glazed ceramic pots only.
Repot every 12–18 months to refresh medium and prevent souring.
🍽️ Feeding
Accepts small insects (gnats, fruit flies).
Feed every 2–3 weeks during active growth.
Avoid fertilizer in soil — will burn roots.
In low-insect areas, light foliar feeding with Maxsea 16-16-16 (1/8 strength) is acceptable once a month.
💤 Dormancy
No true dormancy, but slows down in cooler months.
Maintain reduced watering and strong light through winter.
⚠️ Common Issues
| Problem | Likely Cause | Fix |
|---|---|---|
| Leaves flop or rot | Too hot / stagnant air | Increase airflow, lower temperature |
| Weak green leaves | Insufficient light | Move to brighter position |
| Black crown | Overwatering or compact soil | Repot, use airy mix, water less |
🧠 Grower’s Note
Drosera spiralis behaves more like a cool-intermediate highland species than a tropical one. Think of it as the “orchid” of the sundews — a bit demanding, but when those red spiraling leaves uncurl under bright light… it’s pure magic. ❤️