They're one of the trendiest blooms to add to your garden, but you'll need to know when to plant dahlias if you want them to grace your home with spectacular colours all summer and autumn.
As is the case with any green-fingered task, it's not enough to know how to plant dahlia tubers – you need to know when to do it, too. And that's always the case, whether you're planning on growing them in pots or in your garden borders.
