Guides to keeping a UK greenhouse warm — from paraffin heaters and electric fan heaters to bubble-wrap insulation and frost protection. Written by installers who fit heaters in customer greenhouses every winter.
Matt W · 25th Jun 2026
Heating a greenhouse without electricity might seem like a tricky task, but it's actually quite doable with a bit of know-how. Whether you're looking to save on energy costs or simply don't have access to power in your greenhouse, there are several clever methods you can use to keep your plants cosy. Let's explore some practical ways to maintain warmth in your greenhouse without relying on electrical heating.
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 · 8th Mar 2026
An unheated greenhouse stays 2-5C warmer than outside on cold nights. Bubble wrap adds another 2-3C. Here is what to expect and how to keep your greenhouse frost-free.
Matt W · 5th Mar 2026
Grow fresh salad leaves every month of the year in an unheated greenhouse. Month-by-month sowing calendar, the five hardiest crops, and how to keep your greenhouse warmer without spending a penny on heating.
Matt W · 2nd Mar 2026
Real monthly heating costs for UK greenhouses. A 6x8 on frost protection costs around 20-30 per month with insulation. Worked examples for 3 sizes.
Matt W · 24th Feb 2026
Before sowing your first seed, optimise your greenhouse environment. Position seed trays on the south-facing side where they'll receive maximum natural light. Install shelving to maximise vertical space?a standard 8x6 greenhouse can house 12+ seed trays when properly configured.
Insulate against temperature fluctuations by using bubble wrap on greenhouse walls during February?April sowings. This simple step maintains 3?5?C warmer night-time temperatures, crucial for heat-loving seedlings like tomatoes and peppers.
Matt W · 24th Feb 2026
Wooden vs aluminium greenhouses compared by installers with 15 years experience. Heat retention, maintenance, cost, and appearance with a comparison table.
Matt W · 11th Feb 2025
Grow orchids in your greenhouse year-round with this UK-specific guide. Covers temperature ranges for warm, intermediate, and cool orchid types, humidity control, potting mixes, staging setup, winter care, and the best heater for orchid growers. Written by Matt W with 16 years of greenhouse installation experience.
Matt W · 19th Nov 2024
Complete guide to overwintering plants in a greenhouse from expert installers. Covers tender plant temperatures, heating options with running costs, month-by-month calendar and frost protection methods.
Matt W · 23rd Jan 2020
Greenhouses help us produce more food for a longer time - we know this already! But what if we went the extra step and took our greenhouse to the next level? Greenhouses alone can extend the growing season by months - without any extra heating.
Matt W · 30th Nov 2015
It's pretty obvious that the larger the greenhouse, the higher the cost of heating it but it is possible to curtain off a section of the house in the winter with bubble-wrap and reduce the volume that has to be heated.
Matt W · 10th Sep 2015
Step-by-step greenhouse insulation guide from expert installers. Covers bubble wrap fitting, R-values, draft-proofing, polycarbonate comparison and real heating cost data. Includes month-by-month calendar and product recommendations.
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