* Prune spring-flowering shrubs such as forsythia immediately after they have bloomed to encourage new growth to flower next year.

* Firm in newly-planted fruit trees and bushes after frost.* Spike and scarify lawns to improve surface drainage and remove thatch.* Start dahlia tubers into growth in a warm greenhouse and take cuttings from those already producing shoots.* Repot houseplants and give them a week or two in a warm, sunny spot as they convalesce.* Sow hardy annuals in vacant spaces in beds and borders.* Sprinkle rose fertiliser around rose bushes and lightly fork it into the soil.* Prune tender climbers and wall shrubs before leaves open fully.* Plant summer hanging baskets and windowboxes but keep under cover until all danger of frost has passed.* Begin to harden off young plants and overwintered cuttings.TIME-SAVING TIPUse horticultural vermiculite to cover seeds instead of compost, as it trickles between your fingers and allows you more control as to the amount you put on.