Keeping a mandevilla plant over winter can be a bit challenging, especially in regions with colder climates like Seattle. However, with the right care and attention, it is possible to successfully overwinter these beautiful plants.
1. Choose the right location: Since mandevillas thrive in warm and sunny conditions, it is important to select a suitable location for the plant. Find a spot in your home that receives bright, indirect sunlight for most of the day. South-facing windows are usually ideal, as they tend to provide the most sunlight during winter months.
2. Temperature considerations: Mandevillas are tropical plants and prefer temperatures above 60°F (15°C). Keep them away from drafty areas such as near doors or windows. If your home tends to get chilly, consider using a space heater or heat mat to maintain a warm environment around the plant.
3. Reduce watering: During winter, mandevillas enter a period of dormancy, and their water requirements decrease. Allow the top inch of soil to dry out between waterings. Overwatering can lead to root rot, so it’s crucial to strike the right balance. Monitor the moisture levels by checking the soil with your finger regularly.
4. Humidity: Mandevillas appreciate higher humidity levels, which can be challenging to achieve during winter when indoor heating tends to dry the air. To increase humidity around the plant, you can use a humidifier or place a tray filled with water near the plant. Misting the leaves occasionally can also help.
5. Pruning and maintenance: Before bringing your mandevilla indoors, give it a good pruning to remove any dead or leggy growth. This not only keeps the plant tidy but also encourages new growth when spring arrives. Trim back any excessively long vines to a manageable size. Remember to disinfect your pruning tools to prevent the spread of diseases.
6. Pest control: Inspect your mandevilla for any signs of pests before bringing it inside. Common pests include aphids, spider mites, and whiteflies. If you spot any, treat the plant with an appropriate insecticidal soap or neem oil. Regularly check the plant for pests throughout the winter and take action promptly if needed.
7. Fertilization: During winter, mandevillas do not require as much fertilizer as they do during the growing season. Once every two to three months, use a diluted, balanced liquid fertilizer to provide essential nutrients. Be cautious not to over-fertilize, as it can lead to weak and leggy growth.
8. Monitor for signs of stress: Pay close attention to your mandevilla throughout the winter months. Look for any signs of stress such as yellowing leaves, leaf drop, or wilting. Adjust your care routine accordingly to address any issues promptly.
9. Transitioning back outdoors: As spring approaches and the risk of frost diminishes, gradually acclimate your mandevilla to outdoor conditions. Start by placing it in a shaded location for a few hours each day, gradually increasing the exposure to sunlight over a week or two. This helps prevent shock and sunburn to the tender new growth.
By following these guidelines and providing the necessary care, you can successfully keep your mandevilla plant healthy and thriving over the winter months. Remember, each plant is unique, so it’s essential to observe and respond to its specific needs.
