Gerbera daisies (Gerbera jamesonii) are tender perennials that thrive in warm climates but struggle in freezing temperatures. To overwinter them indoors, it's essential to replicate their preferred growing conditions. These plants require bright light, moderate humidity, and well-draining soil. During winter, they enter a semi-dormant state, reducing their growth rate and water needs. Preparing them for indoor overwintering involves adjusting light, temperature, and care routines to mimic their natural habitat.
Before bringing gerbera daisies indoors, inspect them thoroughly for pests like aphids or spider mites. Treat any infestations with insecticidal soap or neem oil. Trim dead or yellowing leaves to reduce stress and improve air circulation. Gradually acclimate the plants to lower light levels by moving them to a shaded outdoor area for 1–2 weeks. This step prevents shock from sudden environmental changes. Ensure the pots have drainage holes to avoid waterlogged soil, which can lead to root rot.
Place gerbera daisies near a south- or west-facing window where they receive at least 6 hours of bright, indirect sunlight daily. Supplemental grow lights can be used if natural light is insufficient. Maintain indoor temperatures between 60–70°F (15–21°C) during the day and above 50°F (10°C) at night. Avoid placing plants near drafts, heaters, or cold windows. Humidity levels should be moderate; use a pebble tray or humidifier if the air is too dry.
Reduce watering frequency in winter, allowing the top inch of soil to dry out between waterings. Overwatering can cause root rot, while underwatering leads to wilting. Water at the base to keep foliage dry and prevent fungal diseases. Fertilization should be minimal or paused entirely during winter, as the plant's growth slows. Resume a balanced, water-soluble fertilizer at half strength in early spring when new growth appears.
Indoor gerbera daisies are susceptible to pests like whiteflies and fungal issues like powdery mildew. Check leaves regularly for signs of infestation or discoloration. Improve air circulation with a small fan and avoid overcrowding plants. If pests appear, isolate the affected plant and treat it promptly. Yellowing leaves may indicate overwatering or poor light, while brown tips suggest low humidity.
Remove spent blooms and dead leaves to encourage healthy growth and prevent disease. Light pruning can be done in late winter to shape the plant and remove leggy stems. Avoid heavy pruning until spring, when the plant resumes active growth. Clean pruning tools with rubbing alcohol to prevent the spread of pathogens.
As temperatures warm above 50°F (10°C), gradually reintroduce gerbera daisies to outdoor conditions. Start by placing them in a sheltered, shaded spot for a few hours daily, increasing exposure over 1–2 weeks. This hardening-off process helps prevent sunburn and stress. Once acclimated, move them to a sunny garden bed or container for the growing season.
