6 old-fashioned plants making a big comeback in 2026 – expect bold colour and beautiful blooms

A richly planted English flower garden in high summer containing delphiniums, buddleja and roses.

Trends cycle in and out of fashion, and your garden plants are no exception. So, in case you were wondering, I asked garden experts what ‘unfashionable’ plants would be having a big comeback in 2026.

While of course, you can always kick aside garden trends and plant what makes you happy, it is always fun to see what flowers are in favour and draw inspiration from them.