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Asparagus crowns can be planted outside now
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Sow coriander seeds in the herb garden
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Lift, divide and replant overgrown clumps of marginal pond plants
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Give the terrace a spring clean to remove dirt, moss and weeds.
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Hardy annuals that don’t mind the cold – calendulas,
cornflowers, lavateras, nasturtiums – can be sown now
shallowly and thinly, in patches or between clumps of late perennials
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Look out for the first greenfly on the new shoots of roses and
be ready to deal with them. Get the old finger-and-thumb to
work to eradicate them before they multiply.
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Winter jasmine can be thinned back to a framework of strong
shoots. Winter heathers- erica carnea and darleyensis must be
sheared over to remove the flowered sections of last year's
shoots, to keep them dense and tidy.
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Glorious pink or white Clematis montana plants are coming to
an end. Even though they may already be full of young shoots,
cut back wall-trained specimens to a well-spaced framework of
younger wood and fresh shoots
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Plant bulbs such as dahlias, gladiolas and lillies. Begonias
should not be planted until frost danger has finished.
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When they’ve finished, deadhead your soring flowering
bulbs but leave the green leaves for about three weeks to provide
food for the bulb.
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If you have a pond, set your aquatic plants towards the end
of the month.
