This week we're heading out into the darkness to meet some surprising garden friends – bats. These furry night fliers are surprising garden helpers, hoovering up all kinds of mosquitos and midges that might otherwise be biting us instead. Shirley Thompson MBE has been at the forefront of UK bat conservation for almost 40 years and she offers advice to gardeners on how we can all play our part in helping keep bat numbers strong.

Did you know that some cacti grow on trees and bloom at night? Meet the spectacular moonflower, Selenicereus wittii, an epiphytic cactus from the Amazonian rainforest. Sally Petitt of Cambridge University Botanic Garden tells the tale of how it bloomed in Britain last year, for the first time ever. Plus expert veg grower Matthew Oliver from RHS Garden Hyde Hall gives some brilliant tomato-growing tips, particularly for the tricky-but-tasty beefsteak varieties.

Useful links

RHS advice on bats in your garden

Stars of the Night (Wild About Gardens pdf all about UK bats)

Secrets of the Moonflower (Cambridge University Botanic Garden)

RHS advice on how to grow tomatoes

Visit RHS Garden Hyde Hall