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Tetragonia tetragonoides

Tetragonia tetragonoides
New Zealand Spinach, Warrigal Greens, Botany Bay Spinach, Cook's Cabbage, Tetragon

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The seeds look very healthy. They are of a good size and fleshy: to be continued...

Philippe B., 16/05/2019

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This plant carries a 6 months recovery warranty

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Value-for-money
The horned sea purslane is an annual vegetable plant that grows up to 30cm (12in) tall. It is cultivated for its entire, triangular, fleshy leaves that can be consumed raw or cooked, similar to spinach. Sowing period is from March to May for a harvest 3 months later.  
Ease of cultivation
Beginner
Height at maturity
30 cm
Spread at maturity
20 cm
Soil moisture
Moist soil
Germination time (days)
8 days
Sowing method
Direct sowing, Sowing under cover
Sowing period March to May
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O
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Flowering time June to September
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F
M
A
M
J
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Harvest time July to December
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Description

The Horned Tetragonia, also known as New Zealand spinach, is an annual vegetable plant that grows up to 30cm (12in) tall. It is cultivated for its tasty leaves, which can be eaten cooked or raw as a garnish, similar to spinach. Sow from March to May for a harvest 3 months later.

It is a vigorous annual vegetable plant that resembles spinach and has a unique iodized flavour. It has the particularity of being heat resistant and can be cooked like spinach. The sowing period extends from March to June for a harvest from July to October.

The New Zealand spinach is not, from a botanical point of view, an actual spinach but rather a distinct species also known as Tetragonia. It is an annual vegetable plant that belongs to the Aizoaceae family, which usually includes plants that are highly resistant to drought. It gets its name from Tetragonia due to the shape of its seeds, which have 4 sides.

Commonly grown in traditional vegetable gardens, Tetragonia seems to be making a comeback in recent years because, in terms of flavour, it is far from being a pale imitation of spinach: it is similar but its leaves are fleshy and have a very interesting hint of iodine. Many chefs have been incorporating it into their menus in recent years.

In the kitchen, Tetragonia is prepared and consumed like spinach, either raw or cooked, in salads, steamed, or quickly sautéed in a pan. It is a vegetable rich in vitamin C and minerals.

It is a plant that develops quite rapidly and, when fully mature, forms a spreading tuft that can reach up to 60cm (24in) in height. Its leaves are triangular and particularly large. Unlike spinach, it does not easily go to seed even during episodes of intense heat.

Harvest: The harvest of New Zealand spinach takes place approximately 3 months after sowing, leaf by leaf, depending on their growth and needs. The outer leaves are cut, allowing the heart of the plant to continue developing and producing new leaves.

Storage: New Zealand spinach does not keep well in the refrigerator as it tends to become soft. It is best consumed a few hours after harvest. However, it can be frozen after blanching for 3 minutes in salted boiling water.


Gardener's tip: To limit watering, we recommend that once the soil has warmed up, you mulch the soil with thin successive layers of grass clippings, if possible mixed with dead leaves. This protective layer helps keep the soil moist and also reduces weed growth.

 

Harvest

Harvest time July to December
Type of vegetable Leaf vegetable
Vegetable colour green
Size of vegetable Medium
Interest Flavour, Productive
Use Table

Plant habit

Height at maturity 30 cm
Spread at maturity 20 cm
Growth rate normal

Foliage

Foliage persistence Evergreen
Foliage colour medium green

Botanical data

Genus

Tetragonia

Species

tetragonoides

Family

Aizoaceae

Other common names

New Zealand Spinach, Warrigal Greens, Botany Bay Spinach, Cook's Cabbage, Tetragon

Origin

Caucasus

Annual / Perennial

Annual

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Planting and care

Sowing: The germination temperature of New Zealand spinach is around 15°C (59°F), and germination usually occurs within 8 to 10 days, but it can sometimes be a bit difficult. We recommend soaking the seeds in water for 24 hours beforehand.

Sowing is done from March, in a heated sheltered container. The seeds are buried at a depth of 2/3cm (1in).

Final planting usually takes place in mid-May, when the risk of frost has passed.

Direct sowing in the ground is possible from mid-May to the end of June, and is done in groups of three seeds, with a spacing of 70 to 80cm (28 to 32in) between plants, as with planting.

Cultivation:

New Zealand spinach is a fairly demanding vegetable, especially in terms of nitrogen and potassium. It requires well-fertilized soil. It is advisable to apply mature compost (around 3kg per m2) in the autumn, by raking it into the soil to a depth of 5cm (2in), after loosening the soil as is customary for all vegetable crops. An application of nitrogen-rich fertilizer, such as "blood and bone," is often welcome. It prefers neutral to slightly acidic soils (pH between 5.5 and 7).

The young plants can sometimes be slow to start, so monitor watering closely and pinch the tips of the stems to encourage branching.

This is a plant that covers a large area of ground, so don't hesitate to associate it with other vertically growing vegetables, such as tomatoes, if your vegetable garden is small.

 

Seedlings

Sowing period March to May
Sowing method Direct sowing, Sowing under cover
Germination time (days) 8 days

Care

Soil moisture Wet
Disease resistance Good
Pruning No pruning necessary

Intended location

Type of use Vegetable garden
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Beginner
Soil Light
Exposure Sun, Partial shade
Soil pH Any
Soil type Silty-loamy (rich and light), 130
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