Greenhouses & Polytunnels

Why buy greenhouses and polytunnels?

Both greenhouses and polytunnels can extend your growing season significantly by sheltering your plants from the elements.

Whether you want something small, plastic or wooden, our premium greenhouses and polytunnels allow you to control factors such as temperature, humidity and light, so you can help your plants reach their full potential.

Greenhouses vs polytunnels

When deciding between a greenhouse and a garden polytunnel, consider your budget, space and personal requirements.

Advantages of a greenhouse

Greenhouses are typically more expensive than polytunnels, but they tend to provide a higher level of protection against the elements. The glass construction allows for maximum light penetration, and they are a fantastic option for year-round gardening.

Advantages of polytunnels

Small polytunnels are a superb option if you're on a budget as they're a cost-effective alternative to a greenhouse. They're a versatile option and extremely simple to install. They have a large interior space, which makes them a viable place to house larger crops, and they can be moved if necessary.

FAQs about greenhouses and polytunnels

Are greenhouses better for longevity than polytunnels?

Due to the hardy construction of greenhouses, they tend to last longer than garden polytunnels. However, if well maintained, a polytunnel (while made of plastic) can last anywhere between four and 10 years.

Do I need a solid foundation for greenhouses and polytunnels?

If you're opting to buy a large or small greenhouse, you'll need a solid foundation. Polytunnels, meanwhile, can be anchored directly into the ground.

Stability and durability are essential factors when choosing a greenhouse, so be sure to have an outdoor space that has a concrete base, paving stones or treated timber supports.

How do I ensure sufficient ventilation?

Ventilation is a key requirement if you want to grow nutritious produce at home. Greenhouses come with vents on the roof and sides that can be opened to allow the air to circulate. For polytunnels, you can leave the ends open or use roll-up sides to improve airflow. You can also install fan systems to keep the air moving in poor conditions.

Do I need planning permission for a greenhouse or polytunnel?

Whether you need planning permission will depend on the location and the size of the greenhouse or polytunnel you plan to buy. Please check with your local planning authority to find out if you need permission prior to purchasing.

Do I need to heat my small greenhouse or polytunnel?

You can use various heating methods, such as electric or gas heaters, as well as hot water systems and solar techniques. Gardeners often use heating to extend the growing season and offer plants extra warmth during the cold months.

A heating system allows you to grow a wider variety of plants and offers year-round protection to your crops. Plants grown in controlled temperatures often produce fruits and vegetables of a higher quality.

Are greenhouses and polytunnels pest-proof?

Both greenhouses and polytunnels provide a barrier against some pests but are not totally pest-proof. Regular monitoring and integrating pest management processes can help you keep them at bay.

What types of plants can I grow in a greenhouse or a polytunnel?

There is no limit to the plants you can grow in a greenhouse or a garden polytunnel.

Why buy a polytunnel or greenhouse from Marshalls Garden?

• Buying a greenhouse or a polytunnel is an investment, so you want to choose a reputable retailer. We have over 75 years of gardening experience and stock only the most trusted brands,
  so you can shop with total peace of mind.
• We have grown an enthusiastic community that we're proud of. Check out our great reviews on Trustpilot or learn more about your latest purchase with our range of growing guides.
• We offer express delivery as standard and have a 100% satisfaction guarantee. If you're not happy, we make it easy for you to return your items.
• Our commitment to high-quality products and
  service saw us recognised with the Silver Award for Best Online Retailer and the Great British Growing Awards.