Impatiens, commonly known as busy Lizzies, are tender perennials or annuals that thrive in warm, humid conditions. Native to tropical and subtropical regions, they lack natural adaptations to survive freezing temperatures. Most impatiens varieties are highly sensitive to frost, which damages their succulent stems and leaves. When exposed to temperatures below 50°F (10°C), their growth slows, and prolonged cold can kill the plant.
To help impatiens survive winter, moving them indoors is the most reliable method. Before the first frost, dig up healthy plants and transplant them into pots with well-draining soil. Place them near a bright, south-facing window where they receive at least 4–6 hours of indirect sunlight daily. Maintain indoor temperatures between 60–75°F (15–24°C) and reduce watering slightly to prevent root rot. Regularly check for pests like aphids or spider mites, which can thrive in dry indoor air.
Another effective overwintering strategy is propagation through cuttings. Take 3–4 inch stem cuttings from healthy plants, remove lower leaves, and dip the ends in rooting hormone. Plant the cuttings in moist potting mix or place them in water until roots develop. Keep them in a warm, humid environment under grow lights or near a sunny window. This method ensures fresh, vigorous plants for the next growing season without the challenges of maintaining mature plants indoors.
In USDA hardiness zones 10–11, where winters are frost-free, impatiens may survive outdoors with minimal care. Mulch heavily around the base with organic material like straw or shredded leaves to insulate roots from occasional cold snaps. Cover plants with frost cloth or burlap during unexpected temperature drops. However, prolonged exposure to temperatures near 40°F (4°C) can still cause stress, so monitoring weather forecasts is crucial.
During winter, impatiens enter a semi-dormant state, requiring less water and no fertilizer. Overwatering can lead to root rot, so allow the top inch of soil to dry between waterings. If grown indoors, avoid placing plants near drafts or heating vents, as sudden temperature fluctuations can weaken them. Prune leggy growth to encourage bushier regrowth in spring.
Many gardeners fail to overwinter impatiens due to inadequate light or excessive moisture. Without sufficient sunlight, plants become spindly and weak. Conversely, overwatering promotes fungal diseases. Additionally, neglecting pest control indoors can lead to infestations. For best results, combine proper lighting, careful watering, and proactive pest management.
As temperatures rise above 50°F (10°C) consistently, reintroduce overwintered impatiens to outdoor conditions gradually. Start by placing them in a shaded, sheltered spot for a few hours daily, increasing exposure over a week. Transplant them back into garden beds or containers after the last frost date, and resume regular watering and fertilizing to encourage blooming.
