Winter Dormancy Guide for Sarracenia and Sundews

As winter approaches, many carnivorous plant growers wonder how to properly care for their temperate species during dormancy. This guide addresses the specific needs of Sarracenia catesbaei, Drosera filiformis, and Drosera arcturi during the cold months.

Understanding Dormancy Requirements

All three species are temperate plants that require a winter dormancy period triggered by shorter day lengths and cooler temperatures. During this time, growth slows dramatically and the plants conserve energy until spring.

Temperature Tolerance

These plants can withstand temperatures down to freezing (32°F/0°C) or slightly below. However, potted plants are more vulnerable because containers provide poor root insulation. Prevent the root ball from freezing solid by providing protection during extreme cold snaps.

Winter Care Essentials

• Moisture: Keep soil barely moist throughout winter—never waterlogged.
• Monitoring: Check occasionally for mold or fungal infections, especially in stagnant air conditions.
• Location: If temperatures rarely drop below 40°F (4°C), plants can remain outdoors or in an unheated garage/cold room.

Species-Specific Behavior

Drosera arcturi dies back to a tiny winter bud (hibernaculum), while D. filiformis loses most of its leaves. Sarracenia catesbaei, being generally hardier, often retains its pitchers through winter. Remove any brown or dead foliage to prevent mold issues.

Spring Awakening

As temperatures rise and day length increases, all three species will resume vigorous growth. Look for fresh traps and pitchers emerging in early to mid-spring.