Lettuce
21days to harvest
7-10 daysdays to germinate
Z5–9USDA zones
Easydifficulty
F1 hybrid

Sowing

Direct sow or start indoors 4-6 weeks before last frost; transplant or thin seedlings to proper spacing

Cultivation

Sun
Full sun to part shade
Water
High — consistent moisture needed
Soil
Well-drained, fertile soil rich in organic matter
Spacing
12-18 inches
Height
3 feet
Season
Warm season annual

Appearance & flavour

Colour
Medium to dark green
Shape
Broad, slightly cupped rounded leaves
Flavour
Mild, crisp, and tender with a clean lettuce flavor and good leaf texture.

In the kitchen

Fresh salads, lettuce wraps, mixed greens, sandwiches, garnish

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1——June – JulyJune – September
2——May – JulyJune – September
3——May – JuneMay – October
4——April – JuneMay – October
5——April – MayMay – November
6——April – MayApril – November
7——March – MayApril – November
8——March – AprilMarch – December
9——February – MarchFebruary – December
10——January – MarchFebruary – December
11——January – FebruaryJanuary – December
12——January – FebruaryJanuary – December
13——January – FebruaryJanuary – December

Companion planting

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

BasilRepels aphids and whiteflies, may improve flavor
ChivesDeters aphids and other soft-bodied pests that damage lettuce
MarigoldsRepels nematodes and aphids while attracting beneficial insects
CarrotsDeep roots don't compete with shallow lettuce roots, maximizes space
RadishesQuick-growing crop helps break up soil and can be harvested before lettuce needs space
NasturtiumsActs as trap crop for aphids and cucumber beetles, draws pests away from lettuce
GarlicNatural pest deterrent against aphids, slugs, and other lettuce pests
SpinachSimilar growing requirements and harvest timing, efficient use of garden space

Avoid

FennelReleases allelopathic compounds that inhibit lettuce growth and germination
BroccoliLarge leaves create too much shade and compete heavily for nutrients
SunflowersAllelopathic effects inhibit lettuce growth and massive size creates excessive shade

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

Where to buy seed and equipment

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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.

DarkGrow forum

Grown Green Giant?

Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.

Similar varieties

Other lettuce with a comparable time to harvest, so a season that suits Green Giant suits these too.

Browse all 110 lettuce