I always say the gardener's best revenge is to eat the weeds. I've been doing it for 30 years and can testify that my health and the health of my garden has never been better. Here are a few hints for gardeners who'd rather eat their weeds than hate them (and for non-gardeners who are adventurous enough to try out nature's bounty).
View your weeds as cultivated plants. Give them the same care and you'll reap a tremendous harvest. Harvest frequently and do it when the weeds are young and tender. Thin your weeds and pinch back the annuals so your weeds become lushly leafy. Use weeds as rotation crops; they bring up subsoil minerals and protect against many insects.
"Interplant" (by not weeding out) selected weeds. Try purslane, lamb's quarters, or amaranth with your corn; chickweed with peas and beans; and yellow dock, sheep sorrel, or dandelion with tomatoes. And most importantly, harvest your weeds frequently, regularly, and generously.
Overgrown radishes, lettuces, and beans are tough and bitter. So are weeds that aren't harvested frequently enough. Give your chickweed a haircut (yes, with scissors!) every four to seven days and it will stay tender all spring, ready to be added to any salad. If you forget a patch for two weeks, it may get stringy, tough, and full of seed capsules. All is not lost at this stage. The seeds are easy to collect (put the entire plant in a plastic bag in the refrigerator for two to three days and use the seeds that fall to the bottom of the bag) and are highly nutritious, with exceptional amounts of protein and minerals.
Carrots and lettuces grow thin and spindly if they aren't thinned, so do lamb's quarters, amaranth, and other edible weeds. Wherever you decide to let the weeds grow, keep them thinned as you would any plant you expect to eat. Here's how I do it: In early spring I lightly top-dress a raised bed with my cool-method compost (which is loaded with the seeds of edible weeds). Over this I strew a heavy coating of the seeds of lettuces, cresses, and brassicas (cultivated salad greens), then another light covering of shifted compost.
Naturally, weed seeds germinate right along with my salad greens. When the plants are about two inches high, I go through the bed and thin the salad greens. I pull out all grasses, smartweeds, cronewort, clearweed, and quick weed (though the last three are edible, I don't find them particularly palatable) and thin back the chickweed, mallows, lamb's quarters, amaranth, garlic mustard, and other edible wild greens.
Keep those annuals pinched back. You wouldn't let your basil go straight up and go to flower, don't let your lamb's quarter either. One cultivated lamb's quarter plant in my garden grew five-feet high and four-feet across, providing greens for salads and cooking all summer and a generous harvest of seeds for winter use.
When a crop of greens has bolted or gone to seed in your garden, pull it all out and replant with another crop. Do the same with your weeds. We can eat the greens of garlic mustard all spring, then pull it out just before it bolts (and make a horseradish-y vinegar from the choicest roots). This often reveals a generous crop of chickweed lurking underneath.
Here are some of my favorite edible weeds:
• Burdock (Arctium lappa) Roots of non-flowering plants harvested after frost make a vinegar that is deep and richly flavorful as well as a world-renowned tonic. Petioles of the leaves and the flowering stalk are also edible. See my book Healing Wise for recipes.
• Chickweed (Stellaria media) Young leaves and stalks, even flowers, in salads. Blend with virgin olive oil and organic garlic for an unforgettable pesto. Add seeds to porridge.
• Dandelion (Taraxacum officinalis) Leaves eaten at any time, raw or cooked, but especially tasty in the fall–not spring!. Roots harvested any time; pickle in apple cider vinegar for winter use. Dandelion flower wine is justly famous.
• Garlic Mustard (Alliaria officinalis) Year-round salad green. Leaves used in any season, even winter. Roots are harvested before plant flowers. Seeds are a spicy condiment.
• Lamb's quarter (Chenopodium alba and related species, like Chenopodium quinoa). Young leaves in salads. Older leaves and tender stalks cooked. Leaves dried and ground into flour (replaces up to half the flour in any recipe). Seeds dried and cooked in soups, porridge.
• Purslane (Portulacca oleracea) The fleshy leaves and stalks of this plant are incredibly delicious in salads and not bad at all when preserved in vinegar for winter use.
• Sheep Sorrel (Rumex acetosella) Leaves add a sour spark to salads. Cooked with wild leeks or cultivated onion and potato they become a soup called "schav."
• Stinging Nettle (Urtica dioica) Young leaves cooked for 40-45 minutes and served in their broth are one of my favorite dishes. Seeds can be used in baked goods and porridge.