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Tomato plants
in Plants
When to sow tomato seeds to grow on in a cold greenhouse and what soil mix to use greater Manchester area
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Start them off in good quality compost for seeds and cuttings and then prick them out into individual pots when big enough using John Innes no 2 compost and ending with John Innes no 3 compost. John Innes is loam based which gives good drainage and the numbers refer to the nutrient levels. You'll need to keep them watered, but not drowning, as they grow and they'll need feeding with a comfrey solution or commercial tomato feed when they start flowering.
Have a look at this info from the RHS before you start - https://www.rhs.org.uk/advice/grow-your-own/vegetables/tomatoes