As a gardening and landscaping expert, I can assure you that it is possible to leave begonias in pots over winter. However, there are a few important considerations to keep in mind to ensure the health and survival of your begonias during the colder months.
One option is to bring your potted begonias indoors for the winter. Begonias are tropical plants and are not frost-tolerant, so it is crucial to protect them from freezing temperatures. Find a suitable indoor location, such as a sunny window or a greenhouse, where the begonias can receive adequate light and warmth. Be sure to acclimate the plants to the indoor environment gradually to prevent shock. This can be done by gradually reducing their exposure to outdoor conditions over a week or two.
Before bringing the begonias indoors, it is important to inspect the plants for any signs of pests or diseases. Remove any dead or damaged leaves, and consider treating the plants with an appropriate insecticide or fungicide, if necessary. This will help prevent any potential problems from spreading to other indoor plants.
Once indoors, it is important to provide the begonias with the right conditions. They generally prefer bright, indirect light, so placing them near a window with filtered sunlight is ideal. Keep the temperature around 60-70°F (15-21°C) and maintain a moderate level of humidity. Avoid placing the plants near drafts or sources of heat, as extreme changes in temperature can stress the begonias.
Watering is another crucial aspect of overwintering begonias indoors. While they do not require as much water during the dormant period, it is important to keep the soil slightly moist. Check the moisture level regularly by inserting your finger into the soil, and water when the top inch feels dry. Be careful not to overwater, as this can lead to root rot. Applying a layer of mulch on top of the soil can help retain moisture and regulate temperature.
If you prefer to keep your begonias outside in pots during the winter, there is an alternative method you can try. This method involves storing the begonia tubers or rhizomes in a cool, dry place. In late autumn, after the foliage has died back naturally or after the first frost, carefully lift the begonias from the pots. Gently shake off excess soil and allow the tubers to dry for a few days. Once dry, pack them in a container with peat moss, vermiculite, or dry sand to prevent them from drying out completely.
Store the container in a cool, dark place with a temperature between 40-50°F (4-10°C). Check the tubers periodically during storage to ensure they are not rotting or drying out. If you notice any signs of decay, remove the affected tubers immediately to prevent the spread of disease.
In early spring, around 6-8 weeks before the last frost date in your area, you can start preparing to plant the begonia tubers again. Gently remove them from storage and plant them in fresh, well-draining soil in pots. Water sparingly at first, gradually increasing the frequency as the plants start to grow.
By following these guidelines, you can successfully overwinter your begonias in pots either by bringing them indoors or by storing the tubers. Remember to provide the right conditions, monitor for pests and diseases, and adjust watering accordingly. With proper care, your begonias will thrive and bring you joy for many seasons to come.
