Grow it fast
Fertile soil, pH 6.0–7.5, and steady water for sweet bulbs.
Vegetable SeedsHSC-KOH-005-PKT
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Brassica oleracea var. gongylodes
80Days to maturity
A seed worth growing
Kossak (F1) Kohlrabi Seed
About this variety
A giant kohlrabi for storage.
Kossak is grown large: pick the bulbs when they are round and about 8" across, before they start to stretch. At that size the flesh is still sweet and tender and the bulbs store well.
In cold storage it keeps for up to about 4 months. Space plants about 10" apart.
About 80 days from sowing. F1 hybrid.
Specs
- Packet: 100 seeds
- Average 5,800 seeds per oz.
In stock — Packet
Current price
$6.45
Original price
Sale price
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Know before you sow
Quick Facts
Growing times vary with weather, soil and local conditions.
Growing guide
From seed to harvestSpace by type
4" for market bulbs, 10" for storage types.
Rotate
Keep it away from other brassicas for a few years.
Pull at size
2–3" for fresh market; about 8" for storage types.
Growing Information
Scientific name
Brassica oleracea var. gongylodes
Growing conditions
Kohlrabi likes mild, cool weather: all season in the North, and fall through winter in the South. Fertile soil at pH 6.0–7.5 and regular watering keep it growing fast, and fast growth gives the sweetest, most tender bulbs.
Days to maturity
Counted from direct sowing; transplants are ready about two weeks sooner.
Transplanting
For the earliest crop, start seed 4–6 weeks ahead, 3–4 seeds per inch in open flats or 2 per cell (thinned to one). Set plants 4–5" apart; give large storage types such as Kossak about 10".
Direct sowing
Sow about 15 seeds per foot, 1/4–1/2" deep, with 12–18" between rows. Thin market types to 4" and storage types to 10".
Seeding rate
At 15 seeds per foot in rows 18" apart: about 250 seeds per 16 ft., 1,000 per 66 ft. and 436,000 per acre.
Disease prevention
Prevention is the main tool: rotate away from cabbage-family crops for several years, start seedlings in clean mix and clean beds, and keep tools and fields sanitary.
Harvest
Pull market types at about 2–3" across and storage types at about 8".
Transplants
About 4,500 plants per oz., or 800 per 1,000 seeds.
Packet
100 seeds.
Seeds per oz.
About 5,800 on average.
Satisfaction Guarantee
We want every packet you buy from Hensley’s Seed Co. to grow well for you.
If anything you order from us doesn’t meet your expectations, just let us know and we’ll replace it or refund what you paid.
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