Try this Sources of water in the garden help animals and are features in themselves: a bird bath can be as simple as a terracotta basin on an upturned pot. Add marbles or pebbles so bees can enjoy a drink, too. If you have a water feature, buy a floating raft to allow birds to drink more easily.

Visit this University of Bristol Botanic Garden is hosting a dozen sculptures – all giant optical illusions – by artist Luke Jerram. The Impossible Garden explores the way visual impairments impact our understanding of the world. For details, go to bristol.ac.uk/botanic-garden.

Plant this Welsh onion, Japanese bunching onion, green onion – whatever you call Allium fistulosum, it’s a handy perennial. The juicy, oniony stems are a good substitute for spring onions, the flower globes are a magnet for bees, and it’s tolerant of many conditions. Height and spread: 50 x 20cm.

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