How to Grow Malabar Spinach UK

When to Plant Malabar Spinach in the UK

When to plant malabar spinach in the UK: in Southern England, sow mid May to mid June. Find your area in the table below.

Region	Sow
Southern England	mid May to mid June
Midlands	mid May to mid June
Northern England	late May to late June
Scotland	late May to late June

Southern England - detail & sources

RHS states planting out is done after the risk of frost has passed; taken here as late May for southern England, with an earlier warm start under glass.

Midlands - detail & sources

Same after-frost planting window as elsewhere in the UK.

Northern England - detail & sources

Planting window opens about a week later than southern England for a later last-frost date -- RHS's H1C rating means this crop is only realistically grown outdoors for summer, so a greenhouse start matters even more this far north.

Scotland - detail & sources

Planting window opens about two weeks later than southern England for Scotland's later last-frost date -- NC State notes growth is disappointing below 80°F, so a greenhouse or very sheltered spot is close to essential here for a worthwhile harvest.

Quick Facts

Factor	Value
Drainage	Moist but well-drained, enriched with organic matter (RHS/NC State).
Lifecycle	Vigorous climbing perennial, grown as a summer annual in the UK. RHS rates it H1C (5-10°C minimum), needing very warm conditions. NC State gives USDA zones 9a-11b, noting the plant is very frost-sensitive.
Edible parts	leaves, stems

Growth Stages

Stage	BBCH	Notes
Sowing	0	NC State: scarify seed to hasten germination, direct-sow 2-3 weeks after the last frost once soil is warm -- germination takes 10-21 days and needs consistent warmth. RHS: grow from seed using standard vegetable-sowing methods, planting out only after frost risk has passed.
Establishment and climbing growth	3	RHS: needs full sun and a sheltered spot, ideally a greenhouse in the UK, given a support to twine up. NC State: growth is disappointing below 80°F but the plant thrives even into the 90s -- provide a sturdy trellis or fence, since a single plant can reach up to 30ft.
Leaf production	3	RHS and NC State both note that regular harvesting keeps the plant producing tender new leaves; keeping soil consistently moist through the season delays flowering, which both sources agree makes the leaves turn bitter once it starts.
Flowering	6	RHS: small white flowers, sometimes with purplish tints, appear in summer -- ornamental as well as a sign that leaf quality is starting to decline. Grown as a summer annual in the UK, since RHS's H1C rating means the plant will not survive a UK winter outdoors.

Harvest & Storage

When to pick: Harvest young leaves once vines are established; regular picking encourages continued leaf production (RHS). Keep soil consistently moist -- dry soil or extreme heat triggers flowering, after which leaves turn bitter (NC State).

Storage

Best used fresh, raw in salads or cooked in soups, stir-fries and stews (NC State).

Malabar-spinach, Seed to Harvest

Succulent, heart-shaped leaves

RHS describes Malabar spinach as succulent-leaved -- the thick, glossy texture is a clear giveaway compared with true spinach.

Leaves along the climbing stem

NC State notes growth is disappointing below 80°F but the plant thrives even into the 90s -- a genuinely heat-loving crop for a hot summer spot.

A trailing climber

NC State notes a single plant can reach up to 30ft trained on support -- a sturdy trellis or fence is worth planning for from the start.

The dark purple fruit

NC State notes the fruit's sap has traditionally been used as a natural food colouring -- a secondary use beyond the edible leaves.

A leaf held for scale

RHS gives a plant height of 1.5-2.5m in UK growing conditions, with individual leaves sized to match this vigorous climbing habit.

Seed for sowing

NC State recommends scarifying seed to hasten germination, then direct-sowing 2-3 weeks after the last frost once the soil has warmed.

Dense leaf growth

Both RHS and NC State note that regular harvesting keeps the vine producing tender new leaves rather than running to flower.

A well-established bed

RHS notes the plant is grown as a summer annual in Britain -- by midsummer, a well-fed, consistently watered planting fills out like this.

The flower spike

RHS describes small white flowers, sometimes with purplish tints -- both ornamental and a sign that leaf quality will soon start to decline as the plant sets seed.

What the research guides add

Malabar spinach is not related to spinach and likes the opposite weather: it wants heat.

• A vigorous climbing vine and frost-tender perennial grown as an annual, typically to six feet but often reaching 30 feet; it needs a sturdy trellis or fence. (NC State Extension)
• It needs well-drained, moisture-retentive soil rich in organic matter and a warm, sunny, sheltered position. (NC State Extension)
• It is well adapted to temperatures into the 90s°F, but growth is disappointing when temperatures stay below 80°F; it is very sensitive to frost and cool temperatures. (NC State Extension)
• Scarify seed to hasten germination. In zone 7 and warmer, direct sow 2 to 3 weeks after the last frost date. (NC State Extension)
• Dry soil or extremely high temperatures cause flowering, which leads to bitter leaves. (NC State Extension)

Sources for this section

• NC State Extension: Basella alba (Plant Toolbox)

Section researched and checked on 25 October 2026 by the SoilCommander Editorial Team. How we check facts: editorial policy.

References

1. North Carolina State University Extension (Plant Toolbox) - Basella alba (Basella, Ceylon Spinach, Indian Spinach, Malabar Spinach, Vine Spinach)

   Light: full sun (6+ hours). Soil: well-drained, moisture-retentive, enriched with organic matter; tolerates clay/loam/sand/high-organic-matter soils, acid to neutral pH; grows in poor soils but performs much better in rich ones. Size: 3-6ft typical (to 30ft trained on support), 2-3ft width. Hardiness: USDA zones 9a-11b, very frost-sensitive. Native range: tropical Asia, possibly Africa. Propagation: seed (scarify to hasten germination) or stem cuttings, which root where stems touch moist soil; direct-seed 2-3 weeks after last frost in zone 7+, warm soil essential for germination. Temperature: thrives in high heat (even 90s F), growth disappointing below 80°F. Pests/diseases: no known diseases or pests; dry soil or extreme heat triggers flowering and bitter leaves. Edible use: succulent leaves and stems eaten raw in salads or cooked in soups, stir-fries and stews; fruit sap used as natural food colouring; leaves have a mild thickening effect in cooked dishes.

2. Royal Horticultural Society - Basella alba (Ceylon spinach, East Indian spinach)

   Hardiness H1C (5-10°C minimum). Soil: loam, sand, clay, moist but well-drained, neutral to alkaline pH. Sun/aspect: full sun, south/west/east-facing. Exposure: sheltered. Size: 1.5-2.5m height, 0.1-0.5m spread. Propagation: grow from seed using standard vegetable-sowing methods; plant out after frost risk has passed. Pests/diseases: generally pest-free and disease-free. Edible use: young leaves harvested and used like spinach; regular picking encourages continued leaf production; grown as a summer annual in Britain; small white flowers, sometimes purplish-tinted, are both productive and ornamental.

2 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.