Lettuce
52days to harvest
7-10days to germinate
Z2–11USDA zones
Easydifficulty
HeirloomContainer friendly

Sowing

Direct seed in spring through summer. Can be grown year-round in warm climates. Succession plant every 3-4 weeks for continuous harvest.

Cultivation

Sun
Full sun to partial shade (4-6+ hours)
Water
1-1.5 inches per week, tolerates some drought
Soil
Well-drained soil, adaptable to various conditions
Soil pH
6.0-7.5
Spacing
8-10 inches
Height
6-12 inches
Season
Warm season annual

Appearance & flavour

Colour
Medium green with some bronze tinting
Size
8-10 inches tall, 6-8 inches wide
Shape
Compact romaine-type with upright, slightly cupped leaves
Flavour
Sweet, mild, and crisp, maintains flavor in heat

In the kitchen

Fresh salads, Caesar salads, wraps, grilling, warm weather cooking

Pests, disease & resistance

Pests
Aphids, whiteflies, thrips
Diseases
Downy mildew, bacterial leaf spot
Resistance
Corky Root (Intermediate)

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1——June – JulyJuly – September
2—July – August——
3—June – August——
4—June – July——
5—May – July——
6—May – July——
7—May – June——
8—April – June——
9—March – May——
10—March – April——
11—February – March——
12——January – FebruaryFebruary – December
13——January – FebruaryFebruary – December

Companion planting

16 beneficial pairings indexed for this variety, 6 to avoid.

BasilRepels aphids and whiteflies, may improve lettuce flavor
ChivesDeters aphids and other soft-bodied insects with strong scent
CarrotsDeep roots don't compete with shallow lettuce roots, help break up soil
RadishesQuick harvest allows succession planting, helps break up compacted soil
MarigoldsRepel nematodes and various garden pests through natural compounds
SpinachSimilar growing requirements and can be interplanted for space efficiency
NasturtiumsAct as trap crop for aphids and cucumber beetles
GarlicNatural fungicide properties help prevent lettuce diseases
LavenderRepels aphids, moths, and other pests while attracting beneficial pollinators
MarigoldsDeters nematodes and aphids, adds vibrant color contrast to rose garden
CatmintRepels aphids, ants, and rodents while attracting beneficial insects
GarlicNatural fungicide properties help prevent black spot and powdery mildew on roses
AlliumsRepel aphids, thrips, and other rose pests through strong sulfur compounds
ClematisProvides vertical interest and shares similar soil and sun requirements
SalviaAttracts beneficial insects and provides complementary blue-purple blooms
HostasProvides ground cover and contrasting foliage texture at rose base

Avoid

FennelReleases allelopathic compounds that inhibit lettuce growth
BroccoliHeavy feeder that competes for nutrients and casts too much shade
ParsleyCan attract carrot flies which may damage lettuce roots
Black WalnutProduces juglone toxin that inhibits rose growth and can cause wilting
Large TreesCompete for nutrients and water while creating excessive shade that roses need
BrassicasHeavy feeders that compete for nutrients and may stunt rose growth

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 Tropicana?

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 Tropicana suits these too.

Browse all 110 lettuce