When to Start the Process
The best time to begin overwintering your Four o'clock flower is after the first light frost in autumn. This is when the foliage has started to die back, but before the ground freezes. Preparing early ensures that the tubers are still in good condition for storage.
Preparing Your Four o'clock flower
Begin by cutting back the foliage of your Four o'clock flower to about 10 centimeters (4 inches) above the soil. This makes it easier to manage the plant and helps to focus energy on the tubers. Be sure to use clean, sharp tools to avoid unnecessary damage and potential disease introduction.
Digging Up the Plant
Carefully dig up the tubers using a garden fork or spade. Start digging around the plant, progressively working closer to avoid damaging the tubers. Gently lift the plant out of the ground and shake off excess soil. Handle the tubers with care to prevent bruising or breaking, which can lead to rot during storage.
Cleaning and Storing Tubers
Once you have dug up the tubers, clean them by brushing off any remaining soil. Avoid washing them as moisture can lead to rot. Allow the tubers to dry for a day in a cool, shaded area. After drying, place them in a container with dry peat moss, vermiculite, or sawdust. Store the container in a cool, dark place like a basement or garage, where the temperature remains between 4-10°C (40-50°F) and humidity is low.
Replanting in Spring
As spring approaches and the threat of frost subsides, it is time to replant the tubers. Choose a sunny location in your garden with well-draining soil. Plant the tubers about 5-8 centimeters (2-3 inches) deep and space them 30-45 centimeters (12-18 inches) apart. Water generously after planting to help them establish. After that, maintain a regular watering schedule.
