Geraniums are brilliant for not being eaten,' says Alan on the podcast. 'One I've just discovered is Patricia (£12.99 at Crocus). It's about knee height, it has magenta flowers and it blooms ...

These hybrids often have extra vigour and some of the best sterile geraniums take up lots of space. The best three are the mid-blue ‘Rozanne’, the black-eyed magenta ‘Patricia’ and the dar ...