Controlling Algae in Sarracenia Water Trays: Safe Methods

Thick, smelly algae in Sarracenia water trays is a common nuisance. Two experts from Sarracenia Northwest offer a stepwise approach that protects your pitcher plants.

For Algae on the Soil Surface

Use a quaternary ammonium product like Consan 20 (available at garden centers). Spray directly on the soil following label directions. Sarracenia's tough leaves tolerate it, but avoid using it on sundews or butterworts—their delicate foliage will be damaged.

For Algae Floating in the Water

Do not add Consan 20 to the water tray. Long-term root exposure can harm Sarracenia. Instead:

• Physically remove as much algae as possible.
• Deprive algae of light: Use dark-colored trays or drape black plastic over the water surface (lift to check water levels).
• Keep water fresh: Regular flushing with rain, distilled, or RO water reduces nutrient buildup that fuels algae.

Combining surface treatment with light exclusion gives the best long-term control without risking plant health.