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It is a waste of seeds and time to sow hardy annuals too early in spring, when the soil is still cold and wet; the seeds will not germinate and may even decay before conditions are right for germination.

Here are a few clues to sowing hardy annuals:

• The earliest time for sowing seeds depends on the weather, and even within a distance of a hundred miles the optimum time may vary by seven to ten days – sometimes more. If you are in doubt about a suitable time, your local gardening club will be able to help.

• Gardens on warm, sun-facing slopes can be sown earlier than those with a cold and wind-blown aspect.

• While waiting for the soil to warm up and dry out slightly, avoid walking on it and causing compaction.

• Wait until the soil’s surface is dry and crumbly – usually during mid- and late spring.