How a Keder Greenhouse Extends Your Growing Season

With a Keder greenhouse, you get more time in the garden each year. It holds warmth, softens light, and keeps steady when the weather turns. That way, short gaps in the weather become longer months of growing potential.

Here is how Keder greenhouses actively extend your growing season, and how you can enjoy the rewards.

Insulation for consistent growth

Cold nights often bring many plant growing seasons to a halt. Keder’s multi-layer bubble cladding is engineered for thermal performance, with an R-value of 1.7. It slows heat loss after sunset and softens sharp dawn shocks, so foliage keeps working and roots stay comfortable.

Steadier nights help to cut costs as well. Focus warmth on benches and trays, where small, well-placed heaters work hardest. Good insulation helps keep temperatures consistent.

Diffused light

Direct sun can create hot spots and leave awkward shade gaps. Keder’s cladding diffuses light through its multi-layered bubble design, spreading brightness more evenly across the canopy. Each square foot contains over 100 air bubbles that scatter up to 83% of incoming light.

This means trays at the back are as well-lit as those at the front, and lower shelves stay productive too. Leaves avoid harsh midday peaks that cause scorch and stress. Softer, even light helps plants to thrive for longer through the year.

Reliable weather performance

Being able to trust your greenhouse in extreme wind keeps your plants in steady conditions. Keder combines a high-tensile steel frame with tough cladding and is proven to resist winds of up to 120 mph.

Knowing the structure can protect weeks of gardening effort is practical, of course, but it also gives real peace of mind.

Controlled ventilation

In cool months, you want to reduce humidity without losing precious warmth. In a rigid, well-sealed greenhouse, brief midday venting lets moist air escape while most heat is retained. Open vents when the sun is out, then close them as the air dries, keeping a steady, reliable microclimate.

Formats to fit your ambition

Keder is consistent at every size. Whether it is a small cold frame, a 2 × 2 metre house, or a 6-metre span, you get the same insulation, the same light diffusion, and the same reliable environment.

Where Keder extends the growing season

A Keder greenhouse can extend your growing season in a few ways. From earlier starts to later finishes, its insulated cladding and diffused light make extra weeks of growth achievable. This benefits warm-season fruiting crops, quick salads, and tender plants.

Warm-season fruiting crops

Tomatoes can be sown and established two to four weeks earlier under cover. Ripe fruit can keep coming for about two to three weeks longer in autumn, even as nights cool more slowly. You enjoy more trusses reaching full flavour and colour, without relying on the heavy heat of summer.

Peppers and chillies can be started two to three weeks earlier on a warm bench under cover. Fruit can keep colouring for about two to three weeks longer into autumn, even as nights cool. You gain stronger early plants and a longer window for peak heat and flavour, without depending on intensive heating.

Aubergines can reach flowering around two weeks earlier under cover, thanks to compact, even growth. Fruit can keep maturing for roughly two weeks longer as September nights stay steadier. You see fewer stalled fruits and a neater finish to the season.

David Domoney attending to his peach tree in his Keder Greenhouse

Fast greens

Rocket, mizuna, mustards and lamb’s lettuce reach the cut-and-come-again stage one to two weeks earlier under cover. Harvests can continue three to six weeks longer into autumn and early winter. Use brief midday venting to keep leaves dry. The result is reliable salad pickings when outdoor beds have slowed or stopped.

Tender keepers

Pelargoniums, fuchsias and tender salvias can overwinter safely with very little fuss. They flower two to four weeks earlier in spring because they restart from established growth rather than regrowing from scratch. That means better value from existing stock and fewer replacement plants to buy.

Citrus in pots can hold steady winter leaf health in bright, cool conditions. Use careful watering and short venting periods on sunny middays. As spring light increases, blossoms and new growth pick up smoothly. You get fewer leaf drops and a tidier reset in spring.

Why Keder equals year-round gardening confidence

• Its cladding has an R-value of 1.7, providing consistent heat from day to night.

• It diffuses up to 83% of scattered light, meaning each spot of your greenhouse grows well, not just the front bench.

• The greenhouse is proven to resist up to 120 mph winds, and has been tested with heavy snow loads too.

• Its heat-retaining abilities can cut costs by up to 50%.

• From domestic to commercial sizes, each has the same growing benefits all year.

  
  

Keder does more than protect plants. It is designed to extend your growing season. You get insulation that saves heat, light your plants can use across every bench, and storm performance that keeps your garden working. That is how year-round gardening becomes normal, and how your best crops arrive weeks earlier and continue for weeks longer than they otherwise would.

David Domoney

To find out more about our Brand Ambassador and Guest Blog Writer visit https://kedergreenhouse.co.uk/david-domoney

Thank you for reading the blog - David Domoney discussing how a Keder greenhouse extends your growing season