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Synergy — Brassicas | DarkGrow Seed Bank

Name: Synergy
Brand: DarkGrow Seed Bank

60days to harvest

7-14 daysdays to germinate

Z6–9USDA zones

Easydifficulty

F1 hybrid

Sowing

Start indoors 6-8 weeks before transplanting, or direct sow in fall for autumn harvest

Cultivation

Sun: Full sun to partial shade (4-6+ hours)
Water: Regular, consistent moisture; approximately 1-1.5 inches per week
Soil: Well-drained loam, slightly acidic pH 6.0-7.5
Spacing: 18-24 inches
Height: 10-24 inches
Season: Warm season annual

Appearance & flavour

Colour: Green
Shape: Well-domed, round head
Flavour: Mild, sweet Brassica flavor with tender texture when harvested at proper maturity.

In the kitchen

Steaming, roasting, stir-frying, raw in salads, coleslaw, soups, grilled

Pests, disease & resistance

Pests: Cabbage loopers, diamondback moths, flea beetles, cabbage worms
Diseases: Clubroot, black rot, powdery mildew, yellows

Planting calendar by USDA zone

Zone	Start indoors	Transplant	Direct sow	Harvest
1	April – May	June – July	June – July	August – September
2	April – May	June – July	May – July	July – September
3	March – April	May – June	May – June	July – October
4	March – April	May – June	April – June	June – October
5	February – March	April – May	April – May	June – November
6	February – March	April – May	April – May	June – November
7	February – March	April – May	March – May	May – November
8	January – February	March – April	March – April	May – December
9	January	February – March	February – March	April – December
10	January	February – March	January – March	March – December
11	January	January – February	January – February	February – December
12	January	January – February	January – February	February – December
13	January	January – February	January – February	February – December

Companion planting

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

DillAttracts beneficial wasps that parasitize cabbage worms and aphids

OnionsStrong scent deters cabbage moths, aphids, and flea beetles

MarigoldsRepels cabbage worms, aphids, and other brassica pests with their pungent aroma

NasturtiumsActs as trap crop for aphids and flea beetles, drawing them away from brassicas

CeleryRepels cabbage white butterflies and improves growth through root zone compatibility

LettuceProvides ground cover and efficient space use without competing for nutrients

GarlicNatural fungicide properties help prevent clubroot and other soil-borne diseases

ThymeDeters cabbage worms and flea beetles while attracting beneficial pollinators

Avoid

StrawberriesCompete for similar nutrients and may inhibit brassica growth through root competition

TomatoesCan stunt brassica growth and both plants compete for similar soil nutrients

Pole BeansHeavy nitrogen fixation can cause excessive leaf growth in brassicas at expense of head formation

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

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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 brassicas growing guide.

Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.

Synergy

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 Synergy?

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