Glass Cloches for Vegetable Growing

Protect your crops, extend your growing season, and garden the traditional way with our range of horticultural glass cloches. Designed for serious growers, allotment gardeners, and kitchen garden enthusiasts, these cloches provide reliable frost protection and create the ideal microclimate for early and productive crops in UK conditions.

Unlike light weight plastic alternatives, sturdy glass cloches offer superior light transmission and heat retention, making them the preferred choice for growers who want consistent, proven results.

Why Use Glass Cloches?

Glass cloches have been used by market gardeners for generations to improve crop success and bring forward harvests.

They are ideal for:

• Protecting seedlings from frost and cold winds
• Warming the soil for earlier planting
• Extending the growing season in spring and autumn
• Shielding young plants from heavy rain and pests
• Creating stable conditions for reliable germination

By trapping solar heat during the day and releasing it slowly overnight, cloches help maintain a more consistent temperature around your plants—particularly important in unpredictable UK weather.

Traditional Horticultural Design

Our cloches are based on time-tested designs such as the Chase barn cloche, widely used in traditional British market gardening.

Each cloche is designed to:

• Sit securely along garden rows
• Allow maximum light penetration
• Provide durable, reusable protection season after season

This makes them particularly suited to structured vegetable growing, whether in allotments or productive home gardens.

What Can You Grow Under Cloches?

Glass cloches are especially effective for early and protected crops, including:

• Lettuce and salad leaves
• Carrots and early root vegetables
• Brassicas such as cabbage and kale
• Strawberries for earlier fruiting
• Herbs and tender seedlings

They are also invaluable for hardening off young plants before transplanting into open ground.

When to Use Cloches in the UK

Timing is key to getting the best results from your cloches.

Typically, growers use them:

• Late winter to early spring (February–April): warm the soil and start early crops
• Spring: protect young plants from late frosts
• Autumn: extend the growing season and protect from early cold snaps

Used correctly, cloches can advance crops by several weeks compared to unprotected planting.

A Word on Watering

Rain water and irrigation water falls off the cloche roof and sides and soaks into the ground around the cloche.  However, the soil surface inside the cloche tends to remain dry and contrary to thinking, this has the very great advantage of helping prevent fungal disease in young plants, especially early and late in the season.  There should  be no need to water inside the cloche but in summer, this may be necessary if the cloches remain in place but mostly they are set aside in storage.  By allowing the rain and irrigation waters to surround the soil around the cloche, enough will migrate to the roots of the plants within the cloche.  These roots will ‘reach outwards’ towards the wetter soil around the cloche making for much stronger plants with better yields.

A further great advantage of a dry soil surface under the cloches is it mitigates slug damage.  The harmful little Keel slugs which live mostly under ground but surface at night, find the dry soil unpleasant to navigate.  Therefore, this hopefully avoids leaf damage. 

Glass vs Plastic Cloches

While plastic cloches are widely available, serious growers often prefer glass for several reasons:

• Better light quality for plant growth
• Greater heat retention
• Longer lifespan without degradation
• More stable in windy conditions

Glass cloches are an investment in long-term growing performance rather than a short-term solution.

Choosing the Right Cloches

When selecting your cloches, consider:

• The length of your planting rows
• The spacing of your crops
• How many cloches you’ll need for continuous coverage

For most vegetable rows, multiple cloches are placed end-to-end to create a protected run.

If you’re unsure, our product pages provide guidance on sizing and coverage to help you plan effectively.

Built for UK Growers

All of our cloches are selected with UK growing conditions in mind—where fluctuating temperatures, wind, and rain can all impact crop success.

Whether you’re managing an allotment or a productive kitchen garden, glass cloches remain one of the simplest and most effective tools for improving reliability and yields.

Explore Our Range

Browse our full selection of glass cloches for vegetable growing below. Each product is designed to deliver practical, proven performance for gardeners who take their growing seriously.  

High Barn Cloche with tall side walls.
Low Barn Cloche with shorter side walls.
Seedbed Cloche .

Glass and Acrylic Cloches: Choosing the Right Glazing for Your Garden

The glass or acrylic glazing is excluded for orders.   These should be sourced locally by the customer.  The glass sizes are provided on this page

https://www.cloches.co.uk/pages/cloche-sizes-1

The choice of glazing material plays an important role in how effectively your cloches protect crops and support healthy growth. Whether you are an allotment gardener or managing a productive kitchen garden, understanding the differences between traditional glass and modern acrylic panes will help you get the best results from your cloches.

Both materials have their place in horticulture, and the right choice depends on your growing conditions, crops, and priorities.

Why Glazing Matters

Cloches work by creating a protected microclimate around your plants. The glazing material affects:

• Light transmission to crops
• Heat retention during cold nights
• Durability and lifespan
• Resistance to wind and weather
• Ease of handling and maintenance

Choosing the right glazing ensures your cloches perform reliably throughout the UK growing season.

Traditional Glass Cloches

Glass is the original and most widely used material for horticultural cloches, trusted by market gardeners for generations.

Key advantages of glass:

Maximum light transmission
Glass allows high levels of natural light to reach plants, supporting strong, healthy growth—particularly important in early spring when daylight is limited.

Excellent heat retention
Glass absorbs warmth during the day and releases it slowly overnight, helping protect crops from frost and temperature drops.

Long lifespan
With proper care, glass panes can last for many years without degrading, making them a reliable long-term investment.

Proven performance
Traditional glass cloches have a long track record in UK vegetable growing, particularly for early crops and frost protection.

Considerations:

• Heavier than acrylic
• Can break if mishandled or in extreme conditions
• Requires careful positioning in exposed areas

Glass remains the preferred choice for serious growers who prioritise performance and traditional methods.

Acrylic Cloches (Perspex or Plastic Glazing)

Acrylic panes offer a modern alternative to glass and are often chosen where durability and ease of handling are key considerations.

Key advantages of acrylic:

Lightweight and easy to handle
Acrylic cloches are significantly lighter than glass, making them easier to move, lift, and reposition.

Impact resistant
Unlike glass, acrylic is far less likely to shatter, making it a practical option in busy gardens or exposed locations.

Safer in windy conditions
Reduced risk of breakage can make acrylic suitable for more exposed plots or allotments.

Considerations:

• Slightly lower light transmission compared to glass
• Can scratch or become cloudy over time and attracts dust
• May not retain heat as effectively as glass
• Shorter lifespan in long-term use

Acrylic is often chosen for convenience, portability, and durability rather than maximum growing performance.

Glass vs Acrylic: Which Is Best?

For most serious vegetable growers in the UK, glass remains the superior choice for crop performance, particularly when aiming for early harvests and reliable frost protection.

However, acrylic can be a good option where:

• Weight and handling are a concern
• Breakage risk needs to be minimised
• Cloches need to be moved frequently

Choosing the Right Option for Your Garden

When deciding between glass and acrylic cloches, consider:

• Your growing goals – early crops and maximum yield favour glass
• Your location – exposed or windy gardens may benefit from acrylic
• How often you move your cloches
• Long-term vs short-term use

Many growers choose to invest in glass cloches for their main growing rows, while using lighter alternatives in specific situations.

A Traditional Approach to Reliable Growing

For generations, UK gardeners and market growers have relied on glass cloches to protect crops, extend the season, and improve consistency.

While modern materials offer alternatives, traditional glass glazing continues to provide the best combination of light, warmth, and durability for productive vegetable growing.

Explore Our Range

Browse our range of glass cloches designed for serious growers. Each cloche is built to deliver reliable protection and proven results in UK conditions.