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Growing tuberous begonias can add vibrant color to your garden throughout the warm months. To ensure healthy plants year after year, dividing tuberous begonias is essential. Proper digging and division techniques help promote new growth and prevent disease.
When to Dig Up Tuberous Begonias
The best time to dig up tuberous begonias is in the early fall, after the first frost has blackened the foliage. This timing allows the tubers to be dried and stored properly before winter dormancy.
Tools Needed for Digging and Division
- Garden fork or spade
- Sharp knife or garden shears
- Gloves for protection
- Clean, dry storage containers
- Chalk or marker for labeling
Steps for Digging Up Tuberous Begonias
Carefully loosen the soil around the tuber to avoid damaging it. Use a garden fork or spade to lift the plant gently from the ground. Shake off excess soil and inspect the tuber for signs of disease or rot.
Handling the Tubers
Gently clean the tubers with a soft brush or cloth. Cut away any damaged or soft sections with a sterilized knife. Allow the tubers to dry in a warm, airy space for a few days to prevent rot during storage.
Dividing the Tuberous Begonias
Once the tubers are dry, divide them to propagate new plants. Use a sharp knife to cut the tuber into sections, each with at least one eye or growth point. Ensure each division has a healthy, firm base.
Tips for Successful Division
- Use sterilized tools to prevent infection.
- Make clean cuts to promote healing.
- Label each division with the date and location for future reference.
- Allow cut surfaces to callus over for a day before storage or planting.
Storing the Divided Tubers
Store the divided tubers in a cool, dry, and dark place such as a basement or cellar. Place them in paper bags or boxes filled with peat moss, vermiculite, or sawdust to keep them dry. Check periodically for signs of rot or mold.
Replanting the Tubers
In spring, when the danger of frost has passed, replant the tubers in well-drained soil with plenty of organic matter. Space them about 12-15 inches apart. Water thoroughly and provide shade until new growth appears.
Additional Tips for Healthy Begonias
- Avoid overwatering to prevent rot.
- Apply a balanced fertilizer during the growing season.
- Remove spent flowers to encourage continuous blooming.
- Protect tubers from freezing temperatures during winter.
With proper care and division, your tuberous begonias will flourish year after year, providing stunning color and beauty to your garden.