Sow
Sow greenhouse tomatoes indoors, and make small sowings of lettuce, radish and hardy herbs. Give peppers and chillies warmth for germination.
Grow
Pot on seedlings once roots hold their compost together. Handle them by a leaf and water gently after moving.
Harvest
Pick the last winter salads while young spring leaves begin to fill the gaps. Do not strip plants bare.
Jobs this month
Clean the space for summer crops, arrange supports and keep fleece ready. Ventilate before heat builds on sunny mornings.
Make your own growing notes
Record what you sowed, your overnight minimum temperature and how the plants responded. Check the compost below the surface before watering: the same calendar date can bring very different conditions from one year to the next. Use the seed packet’s variety-specific guidance alongside this monthly plan.
For tender crops, distinguish the warmth needed for germination from the conditions needed after seedlings emerge. For winter leaves, choose varieties intended for the season and allow for slower growth as daylight falls.
Further reading: RHS greenhouse vegetable growing.
What’s happening in your greenhouse?
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