What can I plant near a walnut tree?

Walnut and especially black walnut release juglone from their roots and leaves, a substance that holds back many plants up to about twice the crown radius away (and further where the roots run). Tomato, potato, pepper, aubergine, cabbage, blueberry and apple suffer; beans, squashes, corn, onions, carrots, beets and raspberries cope. Keep walnut leaves out of mulch and the main compost: compost them apart for 1–2 years, by then the juglone has broken down. Under the crown a lawn, herbs or a seat do better. Draw the walnut on the plot drawing and the plan tells you which beds are too close. The tree itself grows fast: a black walnut can put on over a metre in its third year.