Perennial Vegetables.

Perennial Vegetables: Sow, Grow, Repeat Winter | Life and style | The Guardian
Plant list
Here’s a list of all the perennial vegetables mentioned in this week’s show

Mashua (Tropaeolum tuberosum)
Ostrich fern (Matteuccia struthiopteris)
Oca (Oxalis tuberosa)
Ground elder (Aegopodium podagraria)
Welsh onion (Allium fistulosum)
Perennial leek (Allium porrum L)
Daubenton kale (Brassica oleracea (Acephala Group))
Leaf beet (Beta vulgaris var vulgaris)
Kale ‘Purple Flanders’
Perennial chillies (‘Alberto’s Locoto’ from Real Seeds)
Three-cornered leek (Allium triquetrum) (Please note, it is illegal to allow this plant to spread into the wild: read this PDF for details)
Daylily (Hemerocallis)
Bamboo shoots
Goji berry leaves (Lycium barbarum)
Solomon’s seal (Polygonatum)
Red valerian (Centranthus ruber)
Good king henry (Chenopodium bonum-henricum)
Chicory ‘Red Rib Dandelion’ (Chicorium intybus)
Nine star perennial broccoli
Perennial wall rocket (Diplotaxis tenuifolia)
Buckshorn plantain (Plantago coronopus)

- Anni Kelsey, author of Edible Perennial Gardening: Growing Successful Polycultures in Small Spaces.