5 Steps to Overwinter Begonias

Step 1: Timing is Everything

Begin your overwintering preparations before the first frost arrives. Most begonias are sensitive to cold temperatures, so you'll want to give them a head start. Typically, this means acting in late summer or early fall, depending on your region's climate.

"The key is to be proactive. Begonias can sense the changing seasons and will start preparing for dormancy on their own. By taking action early, you can guide this process and ensure their health."

— Dr. Elizabeth Green, Horticulturalist

Step 2: Select the Right Begonias

Not all begonias are created equal when it comes to overwintering. Some varieties, like tuberous begonias, are more sensitive and require more care. Others, like the wax begonia, are hardier and can tolerate more neglect.

• Tuberous Begonias: These stunning flowers are prized for their large, vibrant blooms. However, their tubers are delicate and require special attention during winter.
• Wax Begonias: Known for their durability, wax begonias are a great choice for beginners. They can handle colder temperatures and require less maintenance during dormancy.
• Rieger Begonias: A hybrid variety, Riegers offer the best of both worlds. They produce beautiful blooms and are more tolerant of winter conditions than tuberous types.

Consider the specific needs and hardiness of your begonia variety when planning your overwintering strategy.

Step 3: Prepare the Plants

Before bringing your begonias indoors, give them a thorough inspection and some tender loving care. This step is crucial for ensuring the plants' health and success during dormancy.

1. Clean Up: Remove any dead or diseased leaves and flowers. This prevents the spread of pests and diseases during the plants' vulnerable dormant state.
2. Prune: Trim back the stems to about 6 inches. This encourages a more compact growth habit and makes the plants easier to manage indoors.
3. Water: Ensure the plants are well-hydrated before bringing them inside. Water them deeply, allowing the excess water to drain away.

Step 4: Choose the Right Location

Finding the perfect indoor spot for your begonias is crucial for their survival. You'll want a location that offers the right balance of light, temperature, and humidity.

• Light: Begonias need bright, indirect light. Avoid placing them in direct sunlight, as this can scorch their leaves. A sunny windowsill with a sheer curtain is ideal.
• Temperature: Most begonias prefer temperatures between 60°F and 75°F (15°C to 24°C). Avoid drafts and extreme temperature fluctuations.
• Humidity: Maintain moderate humidity levels. You can achieve this by placing a tray of water near the plants or using a humidifier.

Consider using a grow light if natural light is limited. These lights provide the necessary spectrum for healthy growth and can be adjusted to the plants' needs.

Step 5: Care and Maintenance

Once your begonias are settled indoors, it's important to provide them with the right care to ensure their survival and prepare them for spring growth.

1. Watering: Water your begonias sparingly during winter. Allow the soil to dry out between waterings to prevent root rot.
2. Fertilizer: Begonias don't require much fertilizer during dormancy. However, you can give them a light feeding with a balanced, water-soluble fertilizer every 4-6 weeks.
3. Pest Control: Keep an eye out for pests like mealybugs and spider mites. Treat any infestations promptly with organic pesticides or by manually removing the pests.