Feed and water houseplants more often now they’re actively growing.
Split overgrown bamboo – you’ll need a sharp spade and an old saw.
Stake tall perennials such as delphiniums and sunflowers with ‘grow through’ supports.
Create new container displays and water well in dry spells.
Sow half-hardy bedding plants in seed trays or cell trays undercover. If there’s space, pot plug plants into larger pots – cheaper than buying bigger pot plants in a month’s time.
Plant up summer baskets and grow undercover before positioning in late May.
Clear out ponds: take out planting baskets and fish (keep in buckets of old pond water), bail out the water, remove sludge and refill. Rainwater is best, but let tap water stand for a week before putting fish back in.
Plant new pond plants using special pond baskets from garden centres.
Last chance to create new lawns using turf without a sprinkler.
Deadhead spring-flowering bulbs.
‘Earth up’ potatoes when shoots are 15cm tall.
Sow rocket, cut-and-come-again salads, summer lettuce, beetroot and carrots in shallow drills (trenches) outside.
Sow winter brassicas outside. Thin and space seedlings to the correct distance when three leaves have grown.
Protect tender vegetables from late frosts – keep horticultural fleece on standby.
Watch out for early pests and diseases – hit them hard now to avoid problems later on.
Sow tomatoes, runner beans, basil, green pepper, marrow, courgettes and sweetcorn in individual modules undercover for planting after the frost.
Use fine Environmesh to protect young carrots from carrot root fly.