![]() Towards the end of the third week leave them uncovered before planting out.Ĭovering with an old curtain or extra fleece can protect from sudden sharp night frosts that occassionally occur in late spring. If the weather is suitable leave the plants outside at night but ensure they are covered. During this process, a change takes place in the seedlings. Ready for the next step Lets talk about how to harden off tomato. Hardening off is the process of gradually exposing seedlings to outdoor conditions. Towards the end of the fortnight remove the fleece during the day. During the last week or two before your last frost, youll need to start hardening them off. In the second week reduce to one layer of fleece. If there are no specialist facilities available, place plants in a sheltered position in front of a south-facing wall or hedge and cover with two layers of fleece to prevent sun scorch and temperature shock.įor the first week, leave outside during the day, but bring in at night. Begin with an hour or two of direct sunlight and increase the amount each day until they can tolerate all-day sun. This may take up to a week, but it is well worht the effort. Move the tomato seedlings to more light each day until they can tolerate full sun without wilting or showing signs of sun scald. A cloche may be used but this does not give as much frost protection as a coldframe. Gradually Increase Wind and Sun Exposure. Gradually raise the lid during the next fortnight until removing it entirely prior to planting. If you don't have a greenhouse, move plants into a cold frame, with the lid open slightly during the days of the first week and closed at night. ![]() After two weeks in these cooler conditions, plants should be moved into a well-ventilated cold frame. When moving plants out of propagator it is best to do so on an overcast dull day as this will help reduce wilting. In this post, I’ll share what you need to know to successfully transition your seedlings to the garden. ![]() Plants raised in heated glasshouses and on windowsills should go first into a cold glasshouse if available. Also known as hardening off plants, this is a critical step to get your seedlings ready to go outside. ![]() Malvern Autumn Show - 22–24 September 2023Īll plants are hardened off in gradual stages.RHS Garden Wisley Flower Show - 5–10 September 2023.RHS Garden Rosemoor Flower Show - 18–20 August 2023.RHS Garden Hyde Hall Flower Show - 2–6 August 2023.RHS Flower Show Tatton Park - 19–23 July 2023.RHS Hampton Court Palace Garden Festival - 4–9 July 2023. ![]()
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