Daily gardening tip · Northern hemisphere · Monday 5 October 2026 · mid autumn
Check Greenhouse Heaters and Cold Frames
As overnight temperatures begin to drop, a sudden frost can ruin your tender plants if your heaters or cold frames fail to work.
20 minuteseasyfrost protection
Wipe down the glass or plastic panels of your cold frame to let in maximum light.
Check the hinges and seals of your cold frame to ensure they close tightly.
Clean any dust or cobwebs off your greenhouse heater.
Test your heater by turning it on briefly to ensure it heats up properly.
Position the heater on a flat surface away from water and dry foliage.
Why it works
Clean panels allow weak autumn sunlight to warm your cold frame during the day, while tight seals trap that heat overnight. Testing your heater now gives you time to repair or replace it before a sudden freeze damages your sheltered plants.
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