Salicornia is a genus of salt-tolerant plants that grow in coastal marshes, tidal flats, and other saline environments around the world. You may know it better by one of its many common names: glasswort, sea beans, sea asparagus, samphire, pickleweed, or crow’s foot greens. These small, succulent plants have fleshy, segmented stems with no visible leaves, giving them a distinctive cactus-like appearance. They’re edible, surprisingly nutritious, and increasingly valued as a sustainable crop that can grow where almost nothing else will.
Where Salicornia Grows
Salicornia species are found on nearly every continent, thriving in salt marshes, coastal mudflats, and salt pannes (shallow depressions in marshes that collect seawater). The most widely studied species is Salicornia europaea, common across Britain, France, and Ireland, though closely related plants grow along the Atlantic and Pacific coasts of North America. Salicornia virginica, sometimes called American glasswort or pickleweed, ranges from Canada through the United States to Mexico.
What makes Salicornia remarkable is its ability to tolerate salt concentrations that would kill most crops. It’s classified as a halophyte, a plant adapted to salty soils and even direct seawater. This adaptation is why it has attracted serious interest from agricultural researchers looking for crops that don’t depend on increasingly scarce freshwater.
Why It’s Called Glasswort
The name “glasswort” comes from an old industrial use. When dried and burned, Salicornia plants produce ash rich in potash, a key ingredient historically used in glassmaking. Before modern chemical processes, glassmakers along European coasts relied on these ashes as a raw material. The name stuck long after the practice faded.
Nutritional Profile
Salicornia packs a surprising amount of nutrition into its small stems. Vitamin C levels are notably high, with ascorbic acid content exceeding 100 mg per 100 grams, roughly matching an orange. One species, Salicornia bigelovii, contains 15.9 mg of beta-carotene per 100 grams of fresh weight, making it a strong source of vitamin A.
The mineral content is equally impressive, though it skews heavily toward sodium. Salicornia europaea leaves contain around 1,421 mg of sodium per 100 grams, which explains the intensely salty taste. The stems and roots offer meaningful amounts of other minerals: about 740 mg of potassium, 159 mg of calcium, 52 mg of magnesium, and 3.25 mg of iron per 100 grams. That potassium figure is comparable to a banana.
The plant also contains a range of protective compounds. Researchers have identified flavonoids like quercetin, kaempferol, and catechin, all of which function as antioxidants. Salicornia also contains phenolic acids including salicylic acid and veratric acid, the latter showing antibacterial and anti-inflammatory properties in lab studies. Its fatty acid profile includes oleic acid (a heart-healthy monounsaturated fat) and polyunsaturated fatty acids.
How to Eat It
Salicornia can be eaten raw or cooked. Raw, it has a satisfying crunch and a briny, ocean-forward flavor concentrated in the stalks (the tips are milder). If you buy or forage fresh sea beans, they may have a layer of salt deposits from ocean spray. Blanching them briefly and shocking them in ice water removes the excess salt. If they’re still too salty for your taste, soaking the stems in water for up to two hours helps.
In the kitchen, sea beans are versatile. You can sauté them with garlic and lemon, stir-fry them, pickle them, steam them, batter and deep-fry them in tempura, or toss them raw into salads. They pair well with starchy foods like potatoes, rice, quinoa, couscous, and pasta, and work as a substitute for green beans or asparagus in frittatas and grain bowls. The key is not to overcook them, or they lose their signature crunch. If your stalks go limp before you use them, an ice water bath will restore their texture.
Because the plant is naturally so salty, you should reduce or eliminate added salt in any recipe that includes it. Avoid pairing it with salty condiments or dressings. Instead, reach for olive oil, fresh herbs, unsalted butter, or flavored vinegar. You can also dehydrate blanched sea beans and grind them into a green salt, a mineral-rich seasoning that works as a lower-sodium alternative to table salt. About 12 ounces of blanched sea beans yields roughly a quarter cup of dried salt after grinding.
A Crop That Grows on Seawater
Salicornia’s most promising feature may be agricultural. In six years of field trials in an extreme coastal desert, Salicornia bigelovii irrigated with direct seawater produced yields of seed and biomass that equaled or exceeded traditional freshwater oilseed crops like soybean and sunflower. The seeds contained 26 to 33 percent oil and 31 percent protein, with low fiber and ash content. The oil is rich in linoleic acid (73 to 75 percent) and can be extracted with standard milling equipment.
More recent research has pushed these numbers further. Pilot plant operations have demonstrated that cleaned, high-density Salicornia bigelovii seeds yield up to 36 percent oil content, with an estimated oil yield potential of 11,442 kilograms per hectare. That surpasses established biodiesel feedstocks. The oil meets international biodiesel quality standards, making Salicornia a candidate for renewable fuel production in coastal desert regions where freshwater agriculture is impossible.
This matters because roughly 40 percent of the world’s land surface is arid or semi-arid, and freshwater supplies are under growing pressure. A crop that converts seawater and barren coastal desert into food, animal feed, and fuel without competing for farmland or freshwater represents a genuinely different approach to food security. Salicornia bigelovii meal, after oil extraction, is protein-rich enough to replace soybean oil in poultry diets.
Sodium Content and Practical Considerations
The most obvious concern with eating Salicornia regularly is its sodium content. Dried glasswort powder contains roughly 8 to 9 grams of sodium per 100 grams, which is substantial. Fresh Salicornia has far less sodium by weight because of its high water content, but it still tastes noticeably salty. If you’re watching your sodium intake, treat sea beans as a flavoring or side dish rather than a bulk vegetable, and skip additional salt in the meal.
Salicornia grows in environments where it can absorb whatever is in the surrounding soil and water. Plants foraged from polluted waterways or industrially contaminated coastlines could concentrate heavy metals or other contaminants. Sourcing from clean environments or purchasing from established growers reduces this risk.