How to Grow Royal Sundew
iNaturalist
Royal Sundew
Drosera regia
flowerRoyal Sundew is a large, dramatic carnivorous plant native to South Africa, featuring distinctive red tentacles tipped with sticky mucilage that trap insects. It produces showy pink to red flowers and can grow quite tall compared to other sundew species. This rare and prized plant is popular among carnivorous plant enthusiasts but requires specific growing conditions.
When should you plant Royal Sundew in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Royal Sundew timeline · Pittsburgh, PA (Zone 6b)
-
Plant Royal Sundew
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Royal Sundew blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Royal Sundew dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Best grown indoors or in controlled conditions; not cold-hardy. Can be cultivated year-round indoors.
Sign up free to see if Royal Sundew grows in your zone — and get a personalized planting timeline.
Get my Royal Sundew timeline →Growth Stages
Seedling
4-8 weeksTiny rosettes emerge with initial tentacles forming. Very delicate and slow-growing.
Maintain high humidity (60-80%), consistent moisture, and bright indirect light. Provide excellent air circulation to prevent fungal issues. Keep in sterile, nutrient-free soil.
Juvenile Growth
6-24 monthsPlant gradually develops more leaves and longer, more prominent red tentacles. Rosette slowly expands.
Maintain warm temperatures (65-75°F), high humidity, and bright light. Ensure excellent drainage and use only distilled water. Monitor for pests—rarely an issue due to carnivory.
Mature Vegetative
OngoingPlant reaches substantial size with a full rosette of long red tentacle-bearing leaves, dramatic appearance. Can grow 12+ inches tall.
Provide stable conditions: bright light, high humidity, warm temperatures. Ensure active air circulation. Continue with distilled/rainwater only. Mature plants are hardier than seedlings.
Flowering
2-4 weeks per bloom cycleTall inflorescence emerges with delicate pink to red flowers arranged along the stem. Flowers are small but showy.
Maintain all standard conditions. Flowers attract pollinators; hand-pollinate indoors or allow insects access if possible. Flowering indicates a healthy, mature plant.
Seed Production
4-6 weeksAfter pollination, tiny seeds develop in capsules. Seeds are extremely small and numerous.
Allow seed pods to mature fully on the plant before collection. Collect pods when dry and brittle. Store seeds in cool, dry conditions until ready to propagate.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Mist plant with distilled water to increase humidity; isolated infestations can be removed manually. Ensure good air circulation.
-
Improve air circulation, reduce leaf wetness, use sterile conditions. Remove affected leaves; rarely requires fungicide.
-
Ensure pot has drainage holes, use sterile soil, avoid overwatering. Repot into fresh mix if detected early.
Uses
Natural pest control
HouseholdThe sticky tentacles actively trap flying insects like gnats, fruit flies, and small insects, making it an effective natural pest control for indoor gardens and greenhouses. [source]
Pollinator support
WildlifeProduces attractive pink-red flowers that draw and feed pollinators while the plant itself supplements its nutrient intake by capturing insects. [source]
Specimen collecting and display
CraftPrized by carnivorous plant enthusiasts and collectors as a striking ornamental specimen for specialized collections and botanical displays. [source]
Traditional herbal use
MedicinalSome Drosera species have been used historically in European herbalism; research suggests potential antimicrobial and respiratory applications. [source]
Scientific curiosity
CulinaryWhile not edible, the plant's active carnivory makes it a fascinating study subject for students and researchers exploring plant adaptations and nutrient cycling. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Drosera regia is not harvested for food or material, but seeds can be collected when pods dry and split naturally. Collect ripe seed capsules, dry them further indoors, and extract tiny seeds for propagation. Hand-pollinate flowers indoors to improve seed set.
Fun Facts
- 🌱 Royal Sundew is one of the largest sundew species in the world, capable of growing 12-18 inches tall or more—far exceeding most temperate sundews which are tiny rosettes.
- 🌱 The sticky secretion on the tentacles contains digestive enzymes that break down insect proteins; the plant absorbs nitrogen directly through its leaf tentacles.
- 🌱 Drosera regia is endemic to a small region of South Africa and is threatened in its native habitat, making cultivated specimens important for conservation of the species.
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Royal Sundew planting timeline
Tell us your zip code and we'll calculate exactly when to start Royal Sundew seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Royal Sundew timeline →