Things to be doing in May:
- Plant out dahlia tubers and cannas after all risk of frost has passed
- Tie in the new shoots of climbing plants, including clematis, wisteria and honeysuckle, to their supports
- Continue sowing annuals, such as California poppies, into gaps in borders for colour from August into autumn
- Plant up hnaging baskets, but keep in a greenhouse or porch for a few weeks to establish, before putting outside