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Sempre Bianca — Lettuce | DarkGrow Seed Bank

Name: Sempre Bianca
Brand: DarkGrow Seed Bank

35days to harvest

7-10 daysdays to germinate

Z4–9USDA zones

Easydifficulty

Heirloom

Sowing

Direct sow after last frost when soil is workable, or start indoors 4-6 weeks before last frost and transplant at first true leaf stage

Cultivation

Sun: Full sun to partial shade (4-6+ hours)
Water: Regular, consistent moisture; prefers evenly moist soil without waterlogging
Soil: Well-draining loam amended with compost; prefers slightly acidic to neutral pH (6.0-7.0)
Spacing: 6-8 inches
Height: 10-24 inches
Season: Warm season annual

Appearance & flavour

Colour: Pale green
Shape: Upright rosette with narrow-stemmed, elongated leaves
Flavour: Mild, delicate, buttery with no bitterness; tender leaf structure provides soft mouthfeel

In the kitchen

Salad mixes, fresh green salads, plating garnish, color contrast element in composed salads

Pests, disease & resistance

Pests: Aphids, slugs, snails, flea beetles
Diseases: Downy mildew, lettuce mosaic virus, bottom rot (in excessive moisture)

Planting calendar by USDA zone

Zone	Start indoors	Transplant	Direct sow	Harvest
1	—	—	June – July	July – September
2	—	—	May – July	June – September
3	—	—	May – June	June – October
4	—	—	April – June	May – October
5	—	—	April – May	May – November
6	—	—	April – May	May – November
7	—	—	March – May	April – November
8	—	—	March – April	April – December
9	—	—	February – March	March – December
10	—	—	January – March	February – December
11	—	—	January – February	January – December
12	—	—	January – February	January – December
13	—	—	January – February	January – December

Companion planting

8 beneficial pairings indexed for this variety, 3 to avoid.

ChivesRepels aphids and improves lettuce flavor while providing natural pest deterrent

MarigoldsDeters nematodes, aphids, and other harmful insects while attracting beneficial predators

CarrotsDifferent root depths prevent competition and carrots help break up soil for lettuce roots

RadishesQuick-growing radishes break up soil and can be harvested before lettuce needs full space

SpinachSimilar growing requirements and harvest times, efficient use of garden space

GarlicNatural fungicide properties help prevent lettuce diseases and repels aphids

NasturtiumsActs as trap crop for aphids and cucumber beetles while adding edible flowers

DillAttracts beneficial insects like ladybugs and parasitic wasps that control lettuce pests

Avoid

BroccoliCompetes for similar nutrients and space, can shade lettuce and stunt growth

SunflowersAllelopathic effects inhibit lettuce germination and growth, plus creates excessive shade

FennelStrong allelopathic properties inhibit growth of lettuce and most other garden plants

Nutrition (per 100 g)

Protein (g): 0.742
Fat (g): 0.0738
Carbohydrate (g): 3.37
Vitamin K (µg): 20.5
Vitamin B6 (mg): 0.0401
Calcium (mg): 14.2
Iron (mg): 0.0332
Magnesium (mg): 6.31
Phosphorus (mg): 19.2
Potassium (mg): 139
Zinc (mg): 0.173

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Where to buy seed and equipment

Some links are affiliate links. If you buy through them we may earn a commission at no extra cost to you.

Growing it? There is a full cultivation guide at the lettuce growing guide.

Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.

Sempre Bianca

Sowing

Cultivation

Appearance & flavour

In the kitchen

Pests, disease & resistance

Planting calendar by USDA zone

Companion planting

Avoid

Nutrition (per 100 g)

Where to buy seed and equipment

Grown Sempre Bianca?

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