Seed Sowing in th greenhouse

Garden Jobs in March

The idea of chilly days and nights disappearing still seems a long way off at the moment, however March heralds the start of Spring. Let’s hope that the temperatures improve as garden plants begin to spring into life.


  • Finish pruning roses this month to encourage strong new growth.
  • This is the last chance to plant bare-root trees, shrubs, roses and fruit trees.
  • Prune shrubs with colourful winter stems to their base such as Cornus and Salix.
  • Start to sow hardy annuals outdoors, including poppies and nasturtiums and nigella.
  • Plant summer-flowering bulbs such as lilies, begonias and freesias in pots and borders.
  • Feed shrubs such as rhododendrons, azaleas and camellias with an ericaceous fertiliser.
  • Tidy up borders, removing established and newly-germinating weeds, then mulch generously.
  • Scatter general-purpose fertiliser over flowerbeds, around roses, shrubs and hedges, lightly forking it into the soil surface.
  • Plant snowdrops in the green to brighten up your winter garden next year.
  • Lift and divide established perennial plants now to improve their vigour and create new plants for your garden.
  • Trim winter-flowering heathers as the flowers disappear to prevent the plants becoming leggy.

Fruit and veg

  • Sow tomatoes, chillies, sweet peppers, courgetts and aubergines in pots indoors.
  • Make the first outdoor sowings of hardy vegetables and protect with cloches or fleece.
  • Plant early potatoes.
  • Start hoeing vegetable beds as soon as the weather starts to warm up as weeds will germinate quickly.


  • Take down insulation in the greenhouse once temperatures begin to rise. This will also let in more light.
  • Buy bedding plants for growing on to a larger size under glass, or sow your own in a heated propagator.
  • Pot up overwintering cannas into fresh compost, water in, then place in a warm spot to encourage them into growth.
  • Sow sweet peas in deep pots and keep them frost-free in a greenhouse or on indoors on a sunny windowsill.
  • Take cuttings from dahlia tubers to raise new plants.
  • Open greenhouse vents on sunny days to prevent the humidity building up.

Garden maintenance

  • In mild weather, give the lawn its first cut, with the mower on a high setting.
  • Put slug barrier products around the new shoots of hostas and other susceptible perennials.
  • Check that tree ties aren’t too tight and that stakes are still firmly anchored in the ground.
  • Prune out any wind-damaged branches on trees and shrubs.
  • Keep putting out food for garden birds as the breeding season will be getting underway.
  • Cut back winter-flowering jasmine to tidy it up and encourage flowers for next year.
  • Get rid of slippery patches on the patio and paving by scrubbing with a broom or blasting with a pressure washer.

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