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Annual Biennial

Lactuca sativa 'Sioux'

lettuce 'Sioux'

A leafy biennial usually grown as an annual. This robust crisphead (iceberg type) lettuce has smooth, crisp, red-tinted leaves and a green heart. This cultivar is slow to bolt. Ready to harvest from June depending on sowing date

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Ultimate height

0.1–0.5 metres

Time to ultimate height

1 year

Ultimate spread

0.1–0.5 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Asteraceae
Native to the UK: No
Foliage: Deciduous
Habit: Bushy
Genus: Lactuca can be annuals, biennials, perennials or shrubs, with alternate leaves, milky white sap and daisy-like flowers in white, yellow or blue. The genus includes a wide range of wild plants, as well as species cultivated for their edible leaves (lettuce)
Name status: Accepted

How to grow

Cultivation

Grow in full sun on moisture-retentive soil. Sow a short row every fortnight to ensure continuity of cropping. Use cloches, plastic tunnels or horticultural fleece to protect early and late crops. See lettuce cultivation for more information

Propagation

Propagate by seed. See sowing vegetable seeds

Suggested planting locations and garden types

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to grey moulds and downy mildews

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