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Jericho — Lettuce | DarkGrow Seed Bank

Name: Jericho
Brand: DarkGrow Seed Bank

60-70days to harvest

7-14days to germinate

Z2–11USDA zones

Easy to moderatedifficulty

HeirloomContainer friendly

Sowing

Direct sow spring through early summer. Can succession plant every 3-4 weeks. Start indoors for early spring transplants.

Cultivation

Sun: Full sun to partial shade (4-6+ hours)
Water: 1-1.5 inches per week, consistent deep watering
Soil: Well-drained, fertile soil with good organic content
Soil pH: 6.2-6.8
Spacing: 8-12 inches
Height: 6-12 inches
Season: Warm season annual

Appearance & flavour

Colour: Deep green outer leaves with pale green to yellow hearts
Size: 10-12 inch tall heads, 4-5 inches wide
Shape: Classic upright romaine with well-filled hearts
Flavour: Crisp, sweet, and refreshing with excellent crunch and no bitterness

In the kitchen

Caesar salads, grilling, chopped salads. Excellent for cooking applications due to sturdy leaves.

Pests, disease & resistance

Pests: Aphids, leafminers, caterpillars
Diseases: Bacterial spot, lettuce drop, tipburn in extreme conditions
Resistance: Superior heat tolerance, excellent bolt resistance, good downy mildew resistance

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.

ChivesRepels aphids and improves lettuce flavor while providing natural pest deterrent

CarrotsDeep roots complement lettuce's shallow roots, maximizing soil use without competition

RadishesQuick-growing radishes loosen soil for lettuce and can be harvested before lettuce needs space

MarigoldsRepel nematodes, aphids, and other pests while attracting beneficial insects

GarlicNatural fungicide properties help prevent lettuce diseases and deter slugs

SpinachSimilar growing requirements and can provide mutual shade in hot weather

NasturtiumsAct as trap crop for aphids and cucumber beetles while repelling ants

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

Avoid

BroccoliLarge leaves create excessive shade and compete heavily for soil nutrients

SunflowersAllelopathic compounds inhibit lettuce germination and growth

FennelStrong allelopathic effects 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

← PreviousNevada Next →Lolla Rossa

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.

Jericho

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 Jericho?

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