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Purslane is the most overlooked plant in Western gardens. It grows prolifically, has been eaten for thousands of years across Mediterranean, Middle Eastern, and Asian cuisines, and holds a distinction that almost no other fresh vegetable can claim: it is the highest plant-based source of omega-3 fatty acids among fresh, whole foods.
Despite this, most Americans have never eaten it and would not recognise it on sight. It appears on lists of garden weeds more often than in produce sections. This is a genuine nutritional opportunity for anyone who grows food at home.
Key takeaways
- Purslane contains approximately 300 to 400mg of alpha-linolenic acid (ALA) per 100g of fresh leaves – the highest omega-3 content of an
y commonly consumed fresh vegetable. - Purslane is one of the only land plants that contains small amounts of EPA (eicosapentaenoic acid) – the long-chain omega-3 typically found only in marine sources.
- Purslane provides ~12.2mg of vitamin E per 100g – unusually high for a leafy vegetable – which protects its own polyunsaturated fats from oxidation both in the plant and once consumed.
- Betalain pigments in purslane stems – the same class of antioxidant compounds found in beets – have demonstrated anti-inflammatory and antioxidant activity in cell studies.
- Purslane contains ~494mg of potassium and ~68mg of magnesium per 100g – meaningful contributions to cardiovascular health and electrolyte balance.
- Purslane is high in oxalic acid, which can be problematic in very large quantities for people prone to kidney stones. At normal culinary quantities, it is safe for most healthy adults.
The omega-3 content: what makes purslane unique
Alpha-linolenic acid (ALA) in vegetables
Omega-3 fatty acids in plant foods are primarily in the form of alpha-linolenic acid (ALA). The body can convert ALA to the longer-chain EPA and DHA that provide cardiovascular and neurological benefits, but conversion efficiency is low – typically 5 to 15 percent for EPA and 0.5 to 5 percent for DHA. Purslane provides ALA in amounts that significantly exceed any other fresh vegetable.
EPA content: uniquely present in a land plant
Most unusually for a plant food, purslane contains small amounts of EPA – the long-chain omega-3 typically found only in marine sources. Research published in the Journal of the American College of Nutrition first documented purslane’s exceptional omega-3 profile compared to other vegetables. The amounts are small relative to fish oil, but purslane is essentially the only widely available land plant that provides pre-formed EPA.
The full nutritional profile
Antioxidants: vitamin C and vitamin E
Purslane is an excellent source of both vitamin C (approximately 21mg per 100g) and vitamin E (approximately 12.2mg per 100g – unusually high for a leafy vegetable). The combination of fat-soluble vitamin E with omega-3 fatty acids in the same plant means the vitamin E is well-positioned to protect the polyunsaturated fats from oxidation, both in the plant and once consumed.
Minerals: potassium and magnesium
Purslane provides approximately 494mg of potassium per 100g and approximately 68mg of magnesium per 100g, comparable to spinach. The combined potassium and magnesium profile makes purslane relevant for blood pressure management alongside its omega-3 content.
Betalains: antioxidant pigments
Purslane stems contain betalains – the same water-soluble pigments found in beets that produce their characteristic red-pink colour. Betalains have antioxidant and anti-inflammatory activity in cell studies and contribute to purslane’s overall antioxidant profile alongside its vitamin content.
How to grow and use purslane
Growing in a Gardyn system
Purslane grows readily in the Gardyn Hybriponic system. It prefers warm temperatures and consistent moisture – conditions that the system provides. It grows quickly and produces a continuous harvest of tender leaves and stems once established. The stems and leaves are both edible, with the leaves being milder and the stems slightly more acidic.
Learn about the August plant release featuring purslane for more details.
Eating purslane
- Raw in salads: tender leaves add a mild, slightly acidic note – works well with stronger flavours like arugula, lemon dressing, and olives
- Wilted briefly in olive oil: 60 seconds in a hot pan produces a texture similar to spinach
- In fattoush: the traditional Middle Eastern salad uses purslane, tomatoes, cucumber, and toasted pita with sumac dressing
- Blended into smoothies: the mild flavour disappears in fruit smoothies while the omega-3 and vitamin content is preserved
Frequently asked questions
Is purslane the same as the weed that grows in my garden?
Almost certainly yes. Portulaca oleracea is one of the most common garden weeds in North America. If you have seen small, succulent-looking plants with paddle-shaped leaves growing in your garden, they are likely purslane and are edible – with similar nutritional properties to cultivated varieties.
How does purslane compare to flaxseed for omega-3?
Flaxseed has dramatically higher ALA per gram (approximately 22g per 100g versus 0.4g for purslane). However, flaxseed is eaten in tablespoon quantities while purslane can be eaten in cup quantities as a salad vegetable. Per serving, purslane provides less ALA than a tablespoon of ground flaxseed but contributes additional vitamins, minerals, and the rare presence of plant-derived EPA.
Does cooking destroy the omega-3 in purslane?
Polyunsaturated fats including ALA are sensitive to high heat and oxidation. Eating purslane raw or lightly wilted preserves most of its omega-3 content. Prolonged high-heat cooking causes more significant losses.