With starry blooms that seem to last all summer long, it is only natural that astrantia makes it to number one on this list.

Aim to feed your dahlias once a fortnight if you’re growing them in pots. For dahlias grown in flower beds or raised beds, you can feed less often; once every three to four weeks will be sufficient.

Not to mention a selection of house plants which are good investments for being long-lived and self-propagating. Start the ...