Using Cloches in Gardens: A Guide to Protecting and Nurturing Plants

Gardeners are always searching for ways to extend the growing season, protect plants from pests and harsh weather conditions, and produce bountiful harvests. One tool that can help achieve these goals is the humble cloche. In this article, we'll explore the benefits of using cloches in gardens and offer tips for selecting, using, and maintaining them.

What Are Cloches and How Do They Work?

Cloches are essentially miniature greenhouses that cover individual plants or small areas of a garden bed. They can be made from a variety of materials, including glass, plastic, fabric, and even recycled materials like milk jugs or soda bottles. Cloches work by trapping heat and moisture around plants, creating a microclimate that can protect them from cold temperatures, wind, and other stressors.

Cloches can also provide a physical barrier against pests like insects, rodents, and birds. Some gardeners use them to start seedlings earlier in the season by warming up the soil and protecting young plants from frost.

Types of Cloches

There are many types of cloches available, each with its own advantages and disadvantages:

Glass Cloches

Glass cloches are the most traditional and elegant option, but they can be fragile and expensive. They also require careful monitoring to prevent overheating and ensure proper ventilation.

A glass cloche covering a single plant in a garden bed.

Plastic Cloches

Plastic cloches are lightweight, inexpensive, and easy to find at garden centers or online. They come in a variety of shapes and sizes, and some models have adjustable vents or built-in stakes for stability. However, plastic cloches may not last as long as other materials and can be prone to cracking or yellowing over time.

A plastic cloche covering several young plants in a garden bed.

Fabric Cloches

Fabric cloches are a more eco-friendly option, as they can be made from materials like burlap, row cover, or old sheets. They allow air and water to circulate freely, but may not provide as much insulation or protection from pests as other types of cloches. Fabric cloches can also be difficult to secure in windy conditions.

A burlap fabric cloche covering a row of lettuce plants in a garden bed.

Tips for Using Cloches

Whether you're new to cloche gardening or a seasoned pro, these tips can help you get the most out of your cloches:

Choose the Right Size and Material

Consider the size and growth habits of your plants when selecting cloches. You want to choose a size that will allow the plant to grow comfortably but still provide ample coverage. Glass and plastic cloches are best for individual plants or small groupings, while fabric cloches can be draped over larger areas.

Monitor Temperature and Ventilation

Cloches can get very hot during the day, especially in direct sunlight. Be sure to check on your plants regularly and vent the cloches if necessary to prevent overheating. You can prop open the lid of a glass cloche or adjust the vents on a plastic model. Fabric cloches may not require ventilation, but should be monitored for signs of wilting or mold.

Water Regularly

Cloches can create a humid environment that may require less watering than an uncovered garden bed. However, you should still check the soil moisture regularly and water as needed. Use a watering can or hose with a soft spray nozzle to avoid damaging delicate plants.

Remove Cloches Gradually

When the weather starts to warm up, it's important to remove cloches gradually to avoid shocking plants. Start by propping open the lid or removing one side of a plastic or fabric cloche during the day, then fully remove the cloche once nighttime temperatures no longer dip below freezing.

Cloches are a versatile and effective tool for any gardener looking to extend the growing season, protect plants from pests and harsh weather conditions, and produce healthy and abundant crops. By choosing the right size and material, monitoring temperature and ventilation, watering regularly, and removing cloches gradually, you can enjoy the benefits of cloche gardening for years to come.

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