Sow
Sow cucumbers indoors towards mid or late spring; follow the seed packet for your variety. Sow basil in warmth and repeat lettuce sowings.
Grow
Pot tomatoes into larger pots as roots fill the old ones. Begin hardening off hardy plants destined for outdoors on suitable days.
Harvest
Harvest radishes promptly while tender, and pick baby salad leaves from established plants.
Jobs this month
Fit crop supports before planting. Check vents and irrigation equipment, and monitor temperature every day.
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?
Ask a growing question or share your experience. Comments and replies are checked before publication.
Loading approved comments…