Plants in the wild rarely grow in isolation – from the fungal network beneath the soil to the layers of the jungle canopy, plants rely on their neighbours to form dynamic communities. And the same is true in your own garden – just think about growing leeks besides carrots to deter carrot fly. But how this companiable growing system really works and how you can use it to your own advantage can seem a bit of a mystery. Here to help demystify the concept is plantsman, author, designer and TV presenter Nick Bailey.

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