Set the alarm clock for 4:33 am

How to use the online alarm clock

Pause your overnight greenhouse frost check at 4:33 am and set the alarm before returning to the thermometer, vents or fleece. It gives you a clear reason to break away from the job instead of repeatedly checking the clock. The alert is timed for 5:00 am, when you can reassess the temperature and decide whether anything needs adjusting.

Your frost inspection may be quiet enough that a muted phone or laptop goes unnoticed, so check the sound level and silent setting before you carry on. A brief test alert confirms that the tone is audible from the greenhouse or the route back to it. If the browser stops running or the computer falls asleep, no alarm will interrupt your greenhouse frost check; keep the page active and use a separate alarm if missing 5:00 am would matter.

Moving between a cool garden and an air-conditioned room at 4:33 am can make the indoor temperature feel harsher than expected, particularly during a warm spell in the UK. Set the air conditioning gently rather than leaving it at a daytime setting, and keep a light layer beside the door for the return indoors. That makes the 5:00 am check less uncomfortable without warming the room so much that going back outside feels abrupt.