Purslane

A humble sidewalk-crack weed that happens to be the richest plant source of omega-3s on earth - a crunchy, lemony, heat-proof succulent green eaten as a delicacy around the world.

A heat-loving summer succulent for full sun and any well-drained soil, thriving on drought and neglect; it volunteers abundantly, and improved culinary strains can be grown as a crop.

Purslane loves what most greens hate: heat, sun, and dry, poor soil. It germinates only in warm soil, thrives in full sun and drought (its succulent leaves store water), and grows through the hottest part of summer with zero care - it's essentially the leafy green for a scorching, dry garden. It's a tender warm-season annual, killed by frost.

You'll almost never need to plant the wild kind - it volunteers abundantly from a huge soil seed bank once summer heat arrives. If you want it as a deliberate crop, improved large-leaved culinary strains ('golden' or upright purslane) are sold as seed and grown like a quick cut-and-come-again green in warm weather. The main 'growing' issue is that purslane is hard to eradicate as a weed: it re-roots from stem fragments and cut plants can still ripen seed, so if you want it gone, remove whole plants (and pieces) before they seed - otherwise, just harvest and eat the free crop.

Snip the fleshy stem tips and leaves all summer - cut-and-come-again - and eat them raw for crunch and tang or cooked; identify carefully to avoid milky-sapped spurge.

Harvest purslane through the heat of summer by snipping the plump, tender stem tips and leaves; it's cut-and-come-again, regrowing fast from cut stems for weeks of picking. Eat it raw - it's crunchy, juicy, and lemony-tangy, wonderful in salads (verdolaga) and salsas - or cooked (stir-fried, in stews, or as a lightly mucilaginous thickener like okra), or pickled. Even the little seed capsules and the tiny black seeds are edible.

The one essential skill is identification, because purslane has a toxic flat look-alike. True purslane has smooth, fleshy, often red-tinged stems, plump paddle-shaped leaves, and NO milky sap. The dangerous look-alike, prostrate spurge, has thin, hairy stems and oozes milky white sap when broken. The milky-sap test is decisive - purslane never bleeds white. Confirm that, forage from unsprayed ground, eat in normal amounts (it's high in oxalates like spinach), and purslane is one of the safest, tastiest, and most nutritious wild foods of summer.

The richest plant source of omega-3 fatty acids, plus vitamins A, C, and E, minerals, and antioxidants - an exceptionally nutritious green, best eaten in normal amounts (it's high in oxalates).

Purslane is nutritionally remarkable. It is the richest known plant source of omega-3 fatty acids (specifically alpha-linolenic acid, ALA) - unusual and valuable in a leafy green - and it's also loaded with vitamins A, C, and E, several B vitamins, magnesium, potassium, calcium, and iron, plus antioxidants including glutathione and betalains. For a plant most people treat as a weed, that's an extraordinary nutritional profile, which is exactly why it's prized as a vegetable across so many cuisines.

The main caveat is the familiar one for leafy greens: purslane is high in oxalates, so eat it in normal amounts (cooking reduces oxalates), and those prone to kidney stones should moderate it. Its succulent tissues also carry a light mucilage that some enjoy (and that thickens soups) and others cook out. Eaten sensibly, purslane delivers omega-3s and a dense package of nutrients that few other greens - wild or cultivated - can match, from a plant that grows free in the summer heat.

A cherished vegetable for thousands of years from the Mediterranean to Mexico to Asia - Gandhi and Thoreau praised it - and only in the modern US demoted to a mere weed.

Purslane has been a valued food and medicine for millennia across the Old World. It was eaten in ancient Egypt, Greece, and Rome, prescribed by Greek and Arab physicians, and has remained a staple vegetable throughout the Mediterranean, Middle East, India, and China to this day - and, as 'verdolaga,' a beloved green in Mexican cooking. Thoreau ate it at Walden, and Gandhi counted it among his favorite foods; it appears in cuisines and herbals worldwide.

Its journey to 'weed' status is really a story of modern Western agriculture narrowing to a few standardized crops. Introduced and naturalized across North America, purslane became an ubiquitous garden and sidewalk weed just as its long culinary heritage was forgotten here. The recent revival of foraging, interest in omega-3s and nutrient-dense foods, and the availability of improved culinary strains have all helped restore purslane's reputation - reminding gardeners that the succulent they've been pulling from the cracks is one of the oldest and healthiest vegetables humanity has grown.

The critical point is telling purslane (smooth, fleshy, no sap) from toxic milky-sapped spurge; otherwise it's about controlling its fragment-rooting spread and eating it in moderation.

Is this purslane or spurge? The decisive test: break a stem - purslane has smooth, fleshy, red-tinged stems, plump leaves, and NO sap; prostrate spurge has thin, hairy stems that ooze MILKY white sap and is toxic. Never eat a milky-sapped plant. It keeps coming back after I weed it: purslane re-roots from stem fragments and cut plants can ripen seed on the ground - to control it, pull and remove whole plants (and fragments) before they seed, don't just hoe and leave pieces. It's slimy: that's the natural mucilage - some like it (great for thickening soups); cooking reduces it, and the raw stems are more crunchy than slimy. Can I eat a lot of it? Eat normal amounts - it's high in oxalates like spinach; moderate if prone to kidney stones. Nothing germinating in spring: purslane needs warm soil (70F+) - it's a summer plant, appearing only once it's hot. Pests/diseases: very few - it's a tough, heat-loving survivor.