What to grow in a UK greenhouse and how to grow it well — tomatoes, cucumbers, peppers, herbs, propagation, companion planting and year-round yields.
Matt W · 18th Jul 2026
Your July checklist for the UK garden and greenhouse, from 16-year installers: daily and holiday watering, weekly high-potash feeding, damping down for the heat, what to harvest and sow now, plus summer pruning for stone fruit and trained apples.
Matt W · 15th Jul 2026
They are not even red in July. Glasshouse red spider mite goes from egg to adult in about a week at 30C, and lays most eggs at exactly the temperature where the predator everyone sells you stops feeding. Here is the identification, the maths, and the predator to buy instead.
Matt W · 15th Jul 2026
Flowers everywhere and not a tomato in sight. Heat kills the pollen about nine days before the flower even opens, so the truss failing today was lost last week. What the temperatures actually are, why nights matter more than afternoons, and why misting is a waste of time.
Matt W · 15th Jul 2026
Blossom end rot is not a calcium shortage and no spray will fix it. A trial of five calcium products cut the rot by nothing at all. Here is what actually causes it in a growbag at 30C, and the watering change that stops it.
Matt W · 10th Jul 2026
Those little black flies over your seed trays are fungus gnats (sciarid fly). Here is how to kill the larvae, dry the compost and clear a greenhouse infestation for good, from 16-year installers.
Matt W · 10th Jul 2026
Hosepipe bans hit millions of UK homes in 2026. Here is how to keep your greenhouse watered legally: cans, water butts and timed drip kits, from 16-year installers.
Matt W · 1st Jul 2026
Can you grow roses in a greenhouse all year in the UK? Not quite, but glass buys earlier blooms and cleaner cut flowers. Variety picks, heating, winter rest and red spider mite control from 16 years under glass.
Matt W · 27th Jun 2026
Grow hydroponically in a UK greenhouse: NFT, Kratky and drip systems, the best beginner crops, and what a setup really costs. From installers with 16 years experience.
Matt W · 25th Jun 2026
Confused by greenhouse jargon? Our glossary explains 40 UK terms in plain English, from eaves height and glazing to damping down and hardening off. From installers with 16 years on site.
Matt W · 23rd Jun 2026
When to sow and plant out greenhouse tomatoes in the UK, with a heated-vs-unheated timeline table. Plant by soil temperature, not the calendar. From installers with 16 years on UK sites.
Matt W · 22nd Jun 2026
How to force hyacinths, paperwhites and amaryllis for Christmas and winter colour. Week-by-week timing, the cold dark period explained, and the kit you need. From UK greenhouse installers with 16 years on site.
Matt W · 19th Jun 2026
How to pinch out tomato side shoots, choose cordon or bush, train a single stem to the ridge, and stop the plant for a heavy crop. Steps from greenhouse installers with 16 years on UK sites.
Matt W · 17th Jun 2026
Greenhouse tomato problems are usually heat and watering, not disease. Diagnose blossom end rot, splitting, greenback, poor fruit set, blight and whitefly, with the greenhouse-specific fix from 16-year installers.
Matt W · 17th Jun 2026
Grow bags suit greenhouse tomatoes, peppers and cucumbers, but plant two per bag, not three. A drip kit ends the twice-a-day summer watering. Setup and feeding tips from 16-year greenhouse installers.
Matt W · 12th Jun 2026
Twelve fruits thrive in a UK greenhouse and eight need no heater at all. Installer-measured temperatures, a difficulty table and advice on the right house for figs, grapes, citrus and melons.
Matt W · 10th Jun 2026
Beetroot, carrots, peas, broad beans and spring onions all crop 4-6 weeks earlier when started under glass. Our installers share the exact UK sowing calendar they use, plus the cold frame kit that makes it work.
Matt W · 10th Jun 2026
Hardening off acclimatises indoor seedlings to outdoor life over 7 to 14 days. Skip it and tender plants die fast. Our UK schedule, cold frame method and frost-watch tips, from installers with 16 years on site.
Matt W · 10th Jun 2026
Plants grow faster under glass thanks to trapped heat, shelter and a longer season. We measured a 19C lift inside on a sunny April day and soil three weeks ahead of open ground. From installers with 16 years on site.
Matt W · 9th Jun 2026
Why rainwater beats tap for seedlings and ericaceous plants, how to size a water butt to your greenhouse roof, and how to fit a diverter in under an hour. From installers with 16 years on site.
Matt W · 8th Jun 2026
Pick fresh salad leaves every month in a UK greenhouse. Matt shares a month-by-month sowing calendar, the hardiest winter leaves, successive sowing and cut-and-come-again tips from 16 years growing under glass.
Matt W · 8th Jun 2026
Twenty-five greenhouse ideas for UK gardens, from a balcony mini to a walk-in Victorian. Shaped by 14 years of real installs, with a frame to match every space and budget.
Matt W · 19th May 2026
Vertical greenhouse gardening turns a 4.5m² floor footprint into roughly 13m² of usable growing area by stacking four zones — floor, staging, climbing, and apex. From UK installers with 16 years on site. Two-tier staging, vertical strings, and apex hanging baskets for under £150 of kit.
Matt W · 18th May 2026
Which pest repelling plants actually work in a UK greenhouse? French marigolds cut whitefly by ~38%, tagetes suppress root-knot nematodes, nasturtiums trap aphids. We cover the science-backed seven plus the myths most blogs repeat without evidence.
Matt W · 15th May 2026
Are coffee grounds good for plants? After 16 years installing greenhouses and watching customers experiment, we cover fresh vs used grounds, the slug deterrent myth, the compost activator role, and which UK crops actually benefit from a mulch.
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