Brassicas
73days to harvest
7-14 daysdays to germinate
Z6–9USDA zones
Easydifficulty
F1 hybrid

Sowing

Start indoors 4-6 weeks before transplanting, or direct sow after last frost danger passes

Cultivation

Sun
Full sun to partial shade (4-6+ hours)
Water
Regular, consistent moisture; approximately 1.5-2 inches per week
Soil
Well-drained loam, slightly acidic to neutral pH (6.0-7.5)
Spacing
18-24 inches
Height
10-24 inches
Season
Warm season annual

Appearance & flavour

Colour
Green
Shape
Large, round, self-wrapping heads
Flavour
Mild, tender flavor with subtle sweetness when harvested at proper maturity.

In the kitchen

Fresh eating, slaws, stir-fries, steaming, fermenting into sauerkraut

Pests, disease & resistance

Pests
Cabbage worm, cabbage looper, imported cabbageworm, flea beetles, diamondback moth larvae
Diseases
Black rot, clubroot, yellows (fusarium wilt), powdery mildew

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1April – MayJune – JulyJune – JulyAugust – September
2April – MayJune – JulyMay – JulyJuly – September
3March – AprilMay – JuneMay – JuneJuly – October
4March – AprilMay – JuneApril – JuneJuly – October
5February – MarchApril – MayApril – MayJune – November
6February – MarchApril – MayApril – MayJune – November
7February – MarchApril – MayMarch – MayMay – November
8January – FebruaryMarch – AprilMarch – AprilMay – December
9JanuaryFebruary – MarchFebruary – MarchApril – December
10JanuaryFebruary – MarchJanuary – MarchMarch – December
11JanuaryJanuary – FebruaryJanuary – FebruaryFebruary – December
12JanuaryJanuary – FebruaryJanuary – FebruaryFebruary – December
13JanuaryJanuary – FebruaryJanuary – FebruaryFebruary – December

Companion planting

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

DillAttracts beneficial insects like parasitic wasps that control cabbage worms
NasturtiumsActs as trap crop for aphids and flea beetles, draws pests away from brassicas
OnionsRepels cabbage root maggots, aphids, and other brassica pests with strong sulfur compounds
MarigoldsDeters nematodes and aphids while attracting beneficial predatory insects
SpinachProvides ground cover and doesn't compete for nutrients, shares similar growing conditions
LettuceMakes efficient use of space as understory crop, matures quickly before brassica reaches full size
GarlicNatural fungicide properties help prevent clubroot and other soil-borne diseases
CeleryRepels cabbage white butterflies and other brassica-specific pests

Avoid

TomatoesCompete for similar nutrients and may inhibit brassica growth through root competition
StrawberriesBrassicas can inhibit strawberry growth and fruit production through allelopathic compounds
Pole BeansCan stunt brassica growth due to nitrogen competition and physical shading

Nutrition (per 100 g)

Calories (per 100 g)
31
Protein (g)
2.57
Fat (g)
0.34
Carbohydrate (g)
6.27
Fibre (g)
2.4
Vitamin A (µg)
8
Vitamin C (mg)
91.3
Vitamin E (mg)
0.15
Vitamin K (µg)
102
Vitamin B6 (mg)
0.191
Folate (µg)
65
Calcium (mg)
46
Iron (mg)
0.69
Magnesium (mg)
21
Phosphorus (mg)
67
Potassium (mg)
303
Zinc (mg)
0.42
Selenium (µg)
1.6

Where to buy seed and equipment

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Growing it? There is a full cultivation guide at the brassicas 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 Denali?

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

Similar varieties

Other brassicas with a comparable time to harvest, so a season that suits Denali suits these too.

Browse all 79 brassicas