Garden Tasks for March
Remove any developing seed heads from daffodils and other spring bulbs. Leave the foliage to build up the bulbs for the following year.
Divide congested clumps of herbaceous perennials.
This is the last month when bare-root fruit trees and bushes can be planted.
Cut back shrubs grown for their colourful winter stems, such as dogwoods (Cornus) and some willows (Salix cultivars). Cut down to their bases to encourage new shoots for next winter.
Cut autumn-fruiting raspberry canes to the ground to stimulate new canes. Cut the tips of summer-fruiting raspberry canes that have grown too tall.
Sow summer bedding and tender annuals in pots and trays.
Sow sweet peas outside.
Plant onion sets, shallots and early potatoes
Re-pot houseplants that are root-bound and top dress large pots with new compost.
If vine weevil is a problem in containers, apply nematode biocontrol (e.g. Defenders nemasys).