pt. 1. An introduction to perennial vegetables -- Why grow perennial vegetables? -- Growing perennial vegetables -- Maintenance of perennial vegetables -- pt. 2. Perennial vegetables A-Z : Air potatoes ; Alfalfa ; American elder ; Apple mint ; Arrowheads ; Asparagus ; Babington's leek ; Baker's garlic ; Balm, lemon ; Bamboos ; Basswood ; Beech ; Bellflowers -- alpine ; Bellflowers -- hardy ; Bladder campion ; Bowles's mint ; Brassicas, perennial ; Broccoli, Chinese ; Broccoli, perennial ; Buffalo pea ; Bunching onion ; Bush kale ; Camass ; Cardoon ; Caucasian spinach ; Chard ; Chickory ; Chinese artichoke ; Chinese boxthorn ; Chinese broccoli ; Chinese cedar ; Chinese chives ; Chinese toon ; Chinese water chestnut ; Chives ; Chufa ; Cinnamon vine ; Collards, tree ; Columbine ; Crosnes ; Daffodil garlic ; Dandelion ; Day lilies ; Duck potato ; Duke of Argyll's tea tree ; Earth chestnut ; Earth nut ; Egyptian onion ; Elder, American ; Elders ; Elephant garlic and perennial leek ; European elders ; Everlasting pea ; False strawberry ; Fennel ; Fireweed ; Fragrant spring tree ; French scorzonera ; Fuki ; Gai lon ; Garlic ; Garlic chives ; Garlic cress ; Giant butterbur ; Globe artichoke ; Goji berry ; Golden saxifrage ; Good King Henry ; Grape vines ; Groundnut ; Ground plum ; Hardneck garlic ; Harebells ; Herb patience ; Honewort ; Hops ; Horseradish ; Hostas ; Ice plant and orpine ; Japanese asparagus ; Japanese butterbur ; Japanese parsley ; Jersey kale ; Jerusalem artichoke ; Kailan ; Kale, perennial ; King's spear ; Lady's leek ; Leaf beet ; Leek, perennial ; Lemon balm ; Lesser stitchwort ; Limes ; Lindens ; Lotus ; Lucerne ; Mallows ; Marsh mallow ; Mashua ; Mint, apple ; Mint, Bowles's ; Mitsuba & honewort ; Mock strawberry ; Monk's rhubarb ; Mountain rye ; Mountain sorrel ; Mulberries ; Multiplier onions ; Nettle ; New Zealand yam ; Nodding onion ; Nopale cacti ; Oca ; Oriental garlic ; Orpine ; Ostrich fern ; Perennial brassicas ; Perennial broccoli ; Perennial kale ; Perennial leek ; Perennial rye ; Perennial sweet peas ; Perennial wall-rocket ; Perennial wheat ; Perpetual spinach & chard ; Pig nut ; Pink purslane ; Plantains ; Poke root ; Potato ; Potato bean ; Potato onion ; Prickly pears ; Quamash ; Radicchio ; Rakkyo ; Ramps ; Ramsons ; Red valerian ; Redwood sorrel ; Rhubarbs ; Rocambole ; Rock samphire ; Rosebay willowherb ; Runner bean ; Salad burnet ; Saltbushes ; Scallion ; Scorzonera ; Sea beet ; Sea kale ; Serpent garlic ; Shallots ; Shuttlecock fern ; Siberian pea tree ; Siberian purslane ; Silverbell tree ; Silverweed ; Skirret ; Snowbell tree ; Softneck garlic ; Solomon's seals ; Sorrels ; Spinach beet ; Stinging nettle ; Strawberries ; Sunchoke ; Swamp potato ; Sweet cicely ; Sweet coltsfoot ; Sweet peas, perennial ; Sweet potato ; Swiss chard ; Tiger nut ; Tree cabbage ; Tree collards ; Tree onion ; Turkish rocket ; Udo ; Ulluco ; Violets ; Walking onion ; Walking-stick kale ; Wapato ; Water caltrop ; Water chestnut ; Water lotus ; Watercress ; Welsh onion, scallion & bunching onion ; Western front kale ; White deadnettle ; Wild arugula ; Wild garlic ; Wild leek ; Wild rocket ; Wild rye ; Wolfberry ; Wood pea ; Wood sorrel ; Yacon ; Yams ; Yellow asphodel.