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Megaton — Onions & alliums | DarkGrow Seed Bank

Name: Megaton
Brand: DarkGrow Seed Bank

90days to harvest

7-10 daysdays to germinate

Z4–9USDA zones

Easydifficulty

F1 hybrid

Sowing

Start seeds indoors 6-8 weeks before last frost, or transplant sets directly in spring

Cultivation

Sun: Full sun to partial shade (4-6+ hours)
Water: Regular, consistent moisture throughout growing season
Soil: Well-drained loam, slightly acidic to neutral pH (6.0-7.0)
Spacing: 4-6 inches in rows 12-18 inches apart
Height: 1-3 feet

Appearance & flavour

Colour: Yellow-gold
Shape: Long, thick bulbs with prominent shanks
Flavour: Mild to moderately pungent onion flavor with good storage quality and excellent keeping ability.

In the kitchen

Fresh slicing, caramelizing, grilling, long-term storage, processing, dehydration

Pests, disease & resistance

Pests: Onion maggots, thrips, cutworms, wireworms
Diseases: Fusarium basal rot, pink root, downy mildew, white rot

Planting calendar by USDA zone

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

Companion planting

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

TomatoesAlliums repel aphids, hornworms, and other pests that damage tomatoes

CarrotsAlliums deter carrot fly while carrots help break up soil for allium bulbs

Brassicas (Cabbage/Broccoli)Alliums repel cabbage worms, aphids, and flea beetles that attack brassicas

LettuceAlliums provide pest protection while lettuce acts as living mulch

RosesAlliums deter aphids, thrips, and may reduce black spot disease

PeppersAlliums repel aphids and other soft-bodied insects that damage pepper plants

StrawberriesAlliums deter slugs, aphids, and nematodes that harm strawberry plants

MarigoldsBoth repel similar pests creating enhanced protection against nematodes and aphids

Avoid

BeansAlliums can inhibit nitrogen fixation by rhizobia bacteria in legume root nodules

PeasAllium compounds interfere with nitrogen-fixing bacteria essential for pea growth

AsparagusAlliums can stunt asparagus growth through allelopathic compounds in soil

Nutrition (per 100 g)

Calories (per 100 g): 40
Protein (g): 1.1
Fat (g): 0.1
Carbohydrate (g): 9.34
Fibre (g): 1.7
Sugars (g): 4.24
Vitamin A (µg): 0
Vitamin C (mg): 7.4
Vitamin E (mg): 0.02
Vitamin K (µg): 0.4
Vitamin B6 (mg): 0.12
Folate (µg): 19
Calcium (mg): 23
Iron (mg): 0.21
Magnesium (mg): 10
Phosphorus (mg): 29
Potassium (mg): 146
Zinc (mg): 0.17
Selenium (µg): 0.5

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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 onions & alliums growing guide.

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

Megaton

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 Megaton?

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