01/05/2026
May gardening & greenhouse jobs reminder - please get in touch if you have any requirements on the points below, to secure your appointment.
Flowers
Prune spring shrubs, after flowering to keep them compact
Tie in the new shoots of climbing plants, including clematis, wisteria and honeysuckle, to their supports
Continue sowing annuals, into gaps in borders for colour from August into autumn
Plant up hanging baskets, but keep in a greenhouse or porch for a few weeks to establish, before putting outside
Apply liquid feed to tulips, daffodils and other spring bulbs to encourage a good display next year
Plant out summer bedding and tender annuals, including sunflowers, after the last frost
Remove faded spring bedding, such as wallflowers and forget-me-nots, and add to your compost bin
Check lilies and fritillaries for scarlet lily beetles and their larvae, as they can rapidly strip plants of all foliage
Harden off tender plants raised indoors, but bring them back in at night to protect from late frosts
Pinch out the shoot tips of bedding plants and young annuals, such as fuchsias, to encourage bushier growth
Greenhouse
Water thirsty crops such as tomatoes, cucumbers and courgettes regularly as the weather starts to warm up
Tie the stems of indoor tomatoes, cucumbers and aubergines to canes as they grow
Plant heat-treated freesia corms in pots for fragrant flowers this summer
Check plants regularly for pests, on shoot tips and the underside of leaves, and treat with biological controls if desired
Put up shading to lower daytime temperatures and reduce scorching
Open doors and vents on warm days, but close them in the evening as nights can still be cold
Take cuttings of woody herbs such as hyssop, rosemary and thyme, and root in pots of gritty compost
Keep pricking out seedlings as soon as they get their first true leaves, to avoid overcrowding and fungal diseases
Start to harden off tender plants and bedding, ready for planting outside after the last frost
Transplant tomatoes into growing bags or large pots, and tie their main stem to a cane or vertical wire for support
Garden maintenance
Scoop out pondweed, blanketweed and algae from ponds and water features
Put soft tops on the tips of all canes, in borders, veg plots, pots and greenhouses, to prevent injury to eyes
Apply wood treatment to wooden garden furniture to condition it for summer
Set up an extra compost bin or a worm bin, so you can recycle more green waste from your kitchen and garden
Mow grass pathways through wildflower areas so you can walk in among the flowers
Hoe bare soil and hand-weed beds weekly, so weeds don't have time to establish and set seed
Trim topiary regularly to promote bushy growth and keep it looking neat
Sow grass seed or lay new turf by the end of this month, to create a new lawn or repair damaged patches
Check shrubs for nests before you start any pruning, to avoid disturbing nesting birds
Build sturdy wigwams and supports for climbers such as runner beans, sweet peas and morning glory
Watch out for aphids on shoot tips and young foliage, and wipe them off or spray with a soap-based solution