Monty Don shows you how to grow and harvest comfrey, then turn it into a nutritious liquid feed that is rich in potassium. This will encourage flowering and fruiting, especially of crops such as tomatoes. Watch this short video to find out how to make your comfrey feed for free, and how to use it to boost your veg crops.

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Verbena bonariensis, Leucanthemum ‘Crazy Daisy’, Dianthus barbatus Mix, and Aquilegia Mrs Scott-Elliot hybrids.

24 free* wildlife-friendly perennials (worth £27.56)

Includes Verbena bonariensis, Leucanthemum ‘Crazy Daisy’, Dianthus barbatus Mix, and Aquilegia Mrs Scott-Elliot hybrids.

*Just pay £5.95 postage to receive 24 FREE wildlife-friendly perennials (6 plugs of each variety).

Offer ends 23.59, Tuesday 15 July.
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BBC Gardeners' World Live 2025
The ultimate summer day out with friends and family, at Birmingham’s NEC 12 – 15 June
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