Spring (March, April, May)
- Prune established roses.
- Sow hardy annuals outdoors and half-hardy annuals in a heated propagator in the greenhouse or on a windowsill indoors.
- Tidy and weed borders, mulch with compost or manure.
- Lift and divide herbaceous perennials (but avoid doing this during frost).
- Start mowing the lawn regularly and apply lawn weed and feed (raking out any dead moss after a few weeks).
- Plant new roses, trees, shrubs and perennials.
- Plant summer-flowering bulbs.
- Feed specimen trees, roses, shrubs and hedging and established beds and borders with a general-purpose organic fertilizer.
- Prick out half-hardy annual seedlings or pot them up as necessary.
- Cut back lavender to shape, but avoid cutting into the old wood.
- Prune spring-flowering shrubs after flowering.
- Clip box hedges (avoiding full sun which can scorch the newly exposed foliage).
- Plant out half-hardy annuals in containers and outdoor beds.
- Plant out dahlias, bring out houseplants and plant any shrubs that are sensitive to the weather.
- Take cuttings from new growth of shrubs and perennials to increase the quantity of plants in the garden.
- Plant hanging baskets to add more colour.
- Provide support for border perennials such as lupins, peonies, asters, penstemons and helianthus.