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Indigo — Lettuce | DarkGrow Seed Bank

Name: Indigo
Brand: DarkGrow Seed Bank

65days to harvest

7-10 daysdays to germinate

Z3–8USDA zones

Easydifficulty

F1 hybrid

Sowing

Direct sow after last frost or start indoors 4-6 weeks before transplanting

Cultivation

Sun: Full sun (6+ hours)
Water: Moderate — regular watering
Soil: Well-drained, fertile soil, slightly acidic to neutral pH
Spacing: 18-24 inches
Height: 3-4 feet
Season: Warm season annual

Appearance & flavour

Colour: Burgundy
Size: 4-5"
Shape: Round, compact heads, 4-5 inches diameter
Flavour: Mild with pleasant, slightly bitter undertones characteristic of quality radicchio; complex flavor that deepens in cooler seasons.

In the kitchen

Salads, grilling, braising, roasting, raw preparations

Pests, disease & resistance

Pests: Aphids, flea beetles, slugs, cabbage worms
Diseases: Bottom rot (resistant variety), tipburn (highly tolerant)

Planting calendar by USDA zone

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

Companion planting

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

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

MarigoldsRepel nematodes, aphids, and other pests that commonly attack lettuce

SpinachSimilar growing requirements and shallow roots make them compatible garden neighbors

GarlicNatural fungicide properties help prevent lettuce diseases and repel soft-bodied pests

NasturtiumsAct as trap crop for aphids and cucumber beetles while attracting beneficial insects

DillAttracts beneficial insects like ladybugs that prey on lettuce pests

ChivesRepels aphids and improves lettuce flavor while providing natural pest deterrent

CarrotsDeep roots don't compete with shallow lettuce roots, and carrots help loosen soil

Avoid

BroccoliLarge leaves create excessive shade and compete for nutrients, stunting lettuce growth

SunflowersAllelopathic compounds inhibit lettuce germination and growth

ParsleyCan attract similar pests and may compete for nutrients in the same soil layer

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.

Indigo

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 Indigo?

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