Hubert Fontaine explains in a video how to overwinter and preserve agapanthus plants.
Perennial in mild climates, agapanthus thrive when grown in pots in regions with cold winters. The better the soil is drained and light, the easier it will be to conserve these plants.
Before bringing them in, remove the withered flowers. Keep the leaves as they serve as a substantial reserve for the roots.
Store them in a greenhouse. Here’s how:
- Equip yourself with a large empty pot.
- Place a wintering veil inside the pot.
- Then set the agapanthus pot on top and pull the veil up around the sides, and even over the top of the plant if the cold is severe.
When the pleasant season returns, remove the pot from its protection and place it back in the garden in a sunny spot. The pots can be buried in sand.
For dwarf agapanthus that are kept in open ground, it is also possible to protect them from the cold by covering their base with a layer of sand. Complement this protection with a layer of dead leaves, and if necessary, add a wintering veil over everything!
Agapanthus, popularly known as African Lily, are native to South Africa and appreciated for their striking blue or white flowers that bloom in spherical clusters. They are a favorite among gardeners for their aesthetic appeal and relatively easy care routine. However, as these perennials originate from a region with warmer climates, special attention is required to help them survive colder conditions, particularly in regions that experience harsh winters.
Here are some detailed steps on how to successfully overwinter agapanthus:
1. Selection of Pot and Soil : Start by ensuring your agapanthus is planted in a suitable pot and soil mix. A pot with adequate drainage holes is essential to prevent waterlogging, which can cause root rot. The soil should be well-draining yet capable of retaining some moisture. A mix of garden soil, sand, and organic matter like compost works well.
2. Prepping for Winter: As winter approaches, inspect your agapanthus for any damaged or dead foliage and remove these parts. This not only helps in preventing disease but also reduces the amount of plant material that needs to be sustained during the low-light winter months.
3. Providing Protection: The method of protection involves using a wintering veil, a lightweight, breathable fabric designed to shield plants from frost and wind while still allowing some air circulation. This prevents the buildup of excess moisture which can prove detrimental.
4. Placement in a Greenhouse: If you have access to a greenhouse, place your potted agapanthus inside. This environment provides a controlled temperature and protects the plant from the freezing outdoor conditions. Without a greenhouse, a bright, frost-free location like a sunroom or enclosed porch can suffice.
5. Monitoring Watering: Throughout the winter months, it is crucial to monitor the watering of your agapanthus. The soil should be kept just moist enough to prevent the roots from drying out. Overwatering can lead to root rot while underwatering can stress the plant. It’s a delicate balance that requires periodic checking.
6. Spring Transition: As temperatures begin to rise in spring and all threat of frost has passed, gradually reintroduce your agapanthus to the outdoor environment. Start by placing the pot in a shaded outdoor area for a few days to allow the plant to acclimatize to the change in conditions. After this transition period, move the pot to a sunny spot and consider replanting it in the garden or leaving it in the pot.
In summary, the key to successfully overwintering agapanthus lies in protecting them from frost, ensuring proper drainage, and maintaining a careful balance in watering. With these steps, you can enjoy the beautiful blooms of agapanthus year after year, regardless of your local climate.