Drosera Burmanii Failing Indoors: Temperature and Lifespan Factors

Drosera Burmanii Failing Indoors: Temperature and Lifespan Factors

Adam in Portland, Oregon, reports a Drosera burmanii declining despite good light (south window + 16-hour fluorescent), distilled water, and original nursery soil. Other sundews (D. aliciae, D. capensis) thrive. Home temps run 60–65°F in winter, warmer with evening wood stove.

Primary Culprit: Cool Temperatures

D. burmanii is a warm-growing annual from Southeast Asia and Northern Australia. It prefers temperatures well above 65°F. In contrast, D. aliciae and D. capensis prefer cooler conditions. The 60–65°F range is likely too cold for sustained D. burmanii vigor. Heat mats are often needed for germination and growth in winter.

Secondary Factor: Natural Annual Lifecycle

D. burmanii is an annual—it grows, flowers, sets seed, and dies within a season. Cutting flower stalks can extend life slightly, but the plant is inherently short-lived. The specimen may simply be reaching its natural end.

Additional Considerations

• Fast growth means higher nutrient demand; infrequent feeding may weaken it.
• Seeds are easy to collect and germinate for a new generation.

Key Takeaway

If your D. burmanii fades in cool indoor conditions, it's likely temperature-related or age-related. Provide warmth (70–80°F), feed regularly, and plan to restart from seed annually.