"Winter-Proof Your Osteospermums: Expert UK RHS Care Tips"

Caring for Osteospermums in the UK over Winter: RHS Guide

Osteospermums, also known as African daisies, are vibrant, hardy perennials that can brighten up any garden with their cheerful, daisy-like flowers. While they are quite tough and can withstand a range of conditions, they do require some care, especially during the UK's cold winter months. The Royal Horticultural Society (RHS) shares its expert advice on how to care for your osteospermums over winter.

Understanding Osteospermum Hardiness

Osteospermums are native to South Africa, so they are well-adapted to cool winters and warm summers. However, they are not entirely frost-hardy, and prolonged exposure to freezing temperatures can damage or even kill them. The key to winter care is providing the right protection to help them through the coldest months.

Preparing Osteospermums for Winter

Before the first frost arrives, take the following steps to prepare your osteospermums for winter:

• Watering: Ensure your plants are well-watered before the ground freezes. This will help them to survive the winter and burst into bloom early in the spring.
• Mulching: Apply a thick layer of organic mulch around the base of your plants. This will help to insulate the roots and prevent frost heave, which can damage the plants.
• Pruning: Cut back your osteospermums to about 30cm (12in) above the ground. This will encourage new growth in the spring and make it easier to provide winter protection.

Providing Winter Protection

Once the first frost has arrived, it's time to provide additional protection for your osteospermums. Here are some methods you can use:

• Fleece: Drape horticultural fleece over your plants to protect them from frost. Make sure the fleece is secure, but not too tight, to allow for air circulation.
• Cold Frames: If you have a cold frame, you can move your osteospermums into it for the winter. This will provide them with extra protection from the cold.
• Greenhouse: If you have a greenhouse, you can overwinter your osteospermums in it. This will provide them with the most protection from the cold, but it may not be practical for all gardeners.

Caring for Osteospermums During Winter

Once your osteospermums are protected, there's not much else you need to do until spring. However, it's a good idea to check on them occasionally to make sure they're not getting too wet or too dry. If the weather is particularly mild, you may need to remove the fleece or open the cold frame to prevent overheating.

Reviving Osteospermums in Spring

As the weather starts to warm up in spring, you can start to prepare your osteospermums for the growing season. Remove any winter protection and prune your plants back to encourage new growth. Once the danger of frost has passed, you can start watering your plants regularly and feeding them with a balanced fertilizer to promote healthy growth and abundant blooms.

Table: Osteospermum Varieties and Their Hardiness

Not all osteospermums are created equal when it comes to hardiness. Here's a table to help you choose the right variety for your garden:

By choosing a hardy variety and providing the right care, you can ensure that your osteospermums will brighten up your garden year after year. So, don't let the cold weather deter you - with the right knowledge and care, you can enjoy these beautiful plants all year round.