New Zealand Spinach (Tetragonia tetragonioides) is a sprawling, heat-loving succulent that produces an abundance of crisp, triangular leaves throughout the hottest summer months when true spinach has long since bolted and died. Brought from the Antipodes to Europe by Captain Cook's botanist Sir Joseph Banks, it quickly earned a place in warm-climate gardens as the spinach that actually thrives in summer heat. Its thick, fleshy leaves have a mild, slightly earthy flavor and a satisfying crunch that makes them excellent both raw and cooked.
• Not actually related to true spinach — belongs to the ice plant family (Aizoaceae)
• One of the best summer spinach substitutes, thriving in heat that kills true spinach
• Brought to Europe by Captain Cook's expedition after being discovered in New Zealand
• Leaves are thick, fleshy, and slightly crunchy — very different in texture from true spinach
• Contains oxalates and should be blanched before eating
• Very heat and drought tolerant
• Found naturally along coastal areas of New Zealand, Australia (including Tasmania), and Japan
• Grows wild on coastal dunes and cliffs, tolerant of salt spray
• First collected by Sir Joseph Banks during Captain Cook's first voyage to New Zealand (1769–1770)
• Introduced to English gardens in the late 18th century
• Spread to continental Europe and North America as a warm-climate spinach substitute
• Has naturalized in parts of coastal California and the Mediterranean
• First described as Tetragonia expansa by Johan Murray in 1778
• Also known as "Botany Bay spinach" and "Warrigal greens" in Australia
• Used by Aboriginal Australians and Maori as a food plant long before European contact
• Commercially grown on a small scale in Australia and New Zealand
Leaves:
• Triangular to broadly ovate, 3 to 10 cm long and 2 to 6 cm wide
• Thick, fleshy, and slightly crunchy in texture
• Bright green, glossy, with a smooth surface and sometimes a crystalline salt deposit
• Covered in tiny, bladder-like water-storage cells (characteristic of the Aizoaceae)
• Mild, slightly earthy flavor similar to spinach but more succulent
Stems:
• Prostrate to semi-erect, thick, fleshy
• Green to slightly reddish, branching extensively
• Can root at the nodes where they contact soil
Flowers:
• Small, yellowish, inconspicuous
• Borne in the leaf axils
• Not showy
Fruits:
• Small, hard, winged capsules with 4 to 8 angles (the genus name "Tetragonia" means "four-angled")
• Contain several seeds each
• Thrives in warm to hot conditions, optimal temperatures 20 to 35°C
• Very heat-tolerant — continues producing when temperatures exceed 35°C
• Sensitive to frost
• Prefers well-drained, sandy soils but adapts to most soil types
• pH range from 6.0 to 8.0
• Tolerates saline conditions and salt spray
• Requires full sun for best growth
• Drought-tolerant once established
• Moderately resistant to pests and diseases
• Spreading habit makes it a good ground cover
• Can be grown as a perennial in frost-free climates
• Good source of vitamins A and C
• Contains moderate amounts of B-vitamins
• Provides iron, calcium, and potassium
• Rich in dietary fiber
• Contains antioxidants and phenolic compounds
• Low in calories, approximately 20 to 25 kcal per 100 g
• High water content (over 90%) from succulent tissues
• Contains oxalates, which are significantly reduced by blanching for 1 to 2 minutes
• Mineral content enhanced in plants grown in saline conditions
• Seeds have a hard coat — soak in warm water overnight or nick with a file before sowing
• Direct-sow after all danger of frost when soil has warmed to 18°C or above
• Plant 1 to 2 cm deep, 30 to 40 cm apart
• Germination can be slow and erratic, taking 2 to 3 weeks
• Can be started indoors 3 to 4 weeks early for a head start
• Provide plenty of space — plants spread widely
• Harvest by cutting leafy stem tips, 5 to 10 cm long
• Regular harvesting encourages bushy, productive growth
• Blanch leaves in boiling water for 1 minute before eating to reduce oxalates
• Keep soil moderately moist but not waterlogged
• Very low maintenance once established
• Always blanch in boiling water for 1 to 2 minutes before use to remove oxalates; discard the cooking water
• After blanching, use like spinach in any recipe
• Sautéed with garlic and olive oil as a side dish
• Added to quiches, tarts, and savory pies
• Used in soups and stews
• Steamed and served with butter and lemon
• The blanched leaves can be cooled and used in salads
• Used in traditional Australian "Warrigal greens" preparations
• Added to pasta dishes and risotto
• Can be frozen after blanching for storage
Wusstest du schon?
When Captain Cook's expedition arrived in New Zealand in 1769, the crew was suffering from scurvy. Sir Joseph Banks discovered this plant growing on the coast and served it to the crew as a cooked green — its vitamin C content helped cure the scurvy, and Banks declared it "as good a spinach as ever I ate." The plant later saved another expedition from scurvy in Australia, earning it the nickname "the sailor's salvation."
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