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

Sowing

Direct sow after last frost, or start indoors 4-6 weeks before planting out

Cultivation

Sun
Full sun to part shade
Water
High — consistent moisture needed
Soil
Well-draining loam, moderately fertile
Spacing
6-8 inches
Height
3 feet
Season
Warm season annual

Appearance & flavour

Colour
Bright green
Shape
Elongated stems with budding florets
Flavour
Sweet, tender stems with a mild, delicate flavor and crisp texture.

In the kitchen

Stir-fries, steamed dishes, soups

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.

ChivesRepels aphids and improves lettuce flavor while providing natural pest deterrent
CarrotsDeep roots don't compete with shallow lettuce roots and help break up soil
RadishesQuick-growing companion that loosens soil and deters flea beetles
MarigoldsRepels nematodes, aphids, and other harmful insects through natural compounds
SpinachSimilar growing requirements and provides ground cover to retain soil moisture
GarlicDeters aphids, slugs, and other pests while not competing for space
NasturtiumsActs as trap crop for aphids and cucumber beetles, drawing pests away from lettuce
DillAttracts beneficial insects like ladybugs and lacewings that control aphids

Avoid

BroccoliCompetes for similar nutrients and can shade lettuce, reducing growth
SunflowersAllelopathic compounds inhibit lettuce germination and growth
Walnut treesProduces juglone toxin that severely stunts or kills lettuce 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

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.

DarkGrow forum

Grown Green 70 D Improved?

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 70 D Improved suits these too.

Browse all 110 lettuce