The four-degree rule will protect your plants from frost

It’s getting chilly out there, with the first frosts slowly sweeping over the UK. That means it’s time to start thinking about frost protection – and it’s worth knowing about the four-degree rule.

It’s pretty self-explanatory: the four-degree rule advises gardeners to start protecting their tender plants when temperatures are predicted to fall to 4°C or less. It’s basically the green light that tells us to start protecting our plants from frost. But is it effective? And does it apply to all plants?

To find out what the four-degree rule means for our gardens, I spoke to the experts.