Can you divide dahlias in spring? If you've got a clump of tubers that’s looking more crowded than a bank holiday beach, we've no doubt you've been wondering... and itching to get at them with your ...

I don’t know any gardeners who casually grow dahlias. Their fireworks riot of color has an intoxicating effect. You may start with one dahlia, but before you know it you have torn out the roses, ...