Are you ready to elevate your gardening game and grow vegetables, so massive that they break records?  With a Keder greenhouse, this dream can become a reality. Let’s dive into how you can achieve this.

Grow Record-Breaking Vegetables in a Keder Greenhouse

A Keder greenhouse is an extremely robust and highly efficient structure designed for optimal growing conditions, providing an even spread of light and warmth throughout the structure, and the ultimate protection from extreme weather and pests, which is crucial for growing large vegetables.

Unlike traditional greenhouses, Keder greenhouses use a unique cladding system that provides superior insulation, light diffusion, durability and strength, maintaining a constant stable growing environment. 

Over the last 30 years 1000’s of professional growers, smallholders and domestic clients have chosen a Keder Greenhouse for various locations throughout the UK, including some of the harshest environments such as the Shetland Islands and Orkney Islands.  Our Greenhouses can also be found in the Falkland Islands.

Our storm proof designs have withstood winds in excess of 120 MPH (proven), and heavy loads from rain, sleet, and snow.

We are the chosen provider of large-scale greenhouses to Commercial Growers and expert horticulturalists throughout the United Kingdom.

Steps to Grow Record-Breaking Vegetables

Choose the Right Seeds

Start with high-quality seeds known for producing large vegetables. Varieties like Atlantic Giant pumpkins or Big Zac tomatoes are bred for their size potential.

Websites like offer a variety of seeds from UK and world record seed lines​.

Prepare the Soil

Use rich, well-draining soil with plenty of organic matter. Adding compost and manure can provide the necessary nutrients for your plants to thrive.

Control the Environment

Our fully automated roof vents monitor the temperature and humidity inside your Keder greenhouse to allow the perfect amount of fresh air to circulate around your plants.

Regular Feeding

Feed your plants with high-quality fertilisers that promote vigorous growth. Organic options like fish emulsion and seaweed extract can be very effective.

Prune and Support

Regularly prune your plants to encourage larger fruits and vegetables. Provide support for heavy vegetables using trellises, cages, or slings to prevent damage.

Pest and Disease Management

Keep an eye out for pests and diseases. The enclosed environment of a Keder greenhouse reduces the risk, but regular checks and organic treatments are essential for maintaining healthy plants.

Find More Information Online

Join online communities and forums such as Giant Veg UK and find useful resources on the Royal Horticultural Society’s (RHS) website. These platforms offer advice, tips, and the opportunity to connect with other growers​.

Watch Ian Neale Multiple World Record Holder on his tour of the giant vegetables inside his Keder Greenhouse on YouTube

Visit to find out how Keder has helped in producing record breaking giant vegetables.

Happy growing!