The Greenhouse in March
Check over your greenhouse this month to make sure there has been no damage over winter. If there are any problems, such as a broken pane of glass, now is the time to fix them.
If you haven’t done so already, clean the glass on the inside and out so that dust and dirt don’t block any much-needed light. Wipe down the frame on the inside, paying particular attention to any crevices where pests might have holed up over winter. Wash the staging and sweep the floor to remove any plant debris and compost.
Although snow and frost are still possible in March, the days are getting longer and the sun is higher in the sky. While it might still be chilly outside in the garden, it can be surprisingly warm inside the greenhouse on a sunny day, which means it’s possible to start sowing hardy annuals such as celeriac, lettuce, radish, spinach, peas and beetroot.
If you have electricity in your greenhouse and a heated propagator mat you can sow tomatoes, chillies and aubergines into trays with plastic covers over them. If not, start these tender crops off on a bright windowsill.
Om Lars Lund
Danish horticulturist and journalist
Lars Lund has for many years engaged in the garden and greenhouse. Lars has published many books about greenhouses, and he has participated in many Danish horticultural TV shows. He is a walking garden encyclopaedia, and he has answers for most basic cultivation questions – also the more ambitious ones.
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