Winner F1

Family: Brassicaceae Brassica

Sweetly crisp and vividly tender, Winner F1 forms kohlrabi bulbs with a clean, creamy-green glow and a smooth, satiny skin that feels almost polished in the hand.

The flesh stays fine-grained and juicy as it matures, delivering a gentle, cabbage-like sweetness that shines in fresh salads and quick roasts. Grow it for reliable, uniform 60-day harvests—an elegant, garden-to-plate favorite when you want crunch with a mild, bright character.

Light: Full SunMaturity: 60 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 28th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 18th
Harvest Begins	Jun 17th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	75
Min Soil Temp (°F)	40
Min Night Temp (°F)	32
Harden Off (days)	6

Culinary Notes

Chef's Note

Winner F1 kohlrabi stays fine-grained and juicy as it size up, so it keeps its crunch under a light roast instead of going mealy. Use it where you want mild, bright brassica sweetness—thin raw shaves for snap, or wedges for a caramelized edge with a creamy center.

Best Uses

shave raw into salads where it stays snappy and satiny
quick-roast wedges until edges bronze but centers stay creamy
turn into a silky puree or mash to showcase its mild sweetness
blanch and toss with butter-lemon for a fast, glossy side

Flavor Profile

gentle cabbage sweetness sweet-tender crunch fine-grained, juicy bite mild, bright brassica finish

Kitchen Pairings

butter lemon tahini parmesan whole-grain mustard chives

Frequently Asked Questions

What pest or disease is most likely on Brassica oleracea var. gongylodes (kohlrabi), and how do I control it?

Watch for cabbage worms and aphids—both chew kohlrabi leaves and can stunt swollen stems. Use row cover right after sowing to block egg-laying, then inspect weekly and hand-pick small caterpillars; for aphids, spray off with a strong water jet and repeat every 2–3 days until they’re gone. If you see blackened, water-soaked seedlings or browning at the soil line, remove affected plants and avoid overwatering to reduce damping-off and related rot.

How often should I water kohlrabi during the main growth phase (bulb/stem swelling)?

From about the time the stem begins to thicken until harvest (~weeks 4–8), keep the soil evenly moist—aim for about 1 inch (2.5 cm) of water per week, adjusted for heat and rainfall. Water deeply, then let the top 1 inch (2.5 cm) dry slightly before the next watering to prevent stem cracking and reduce the chance of fungal leaf spots.

How can I tell when my kohlrabi is ready to harvest?

Harvest when the stem ‘bulb’ is firm and has reached about 2–3 inches (5–7.5 cm) across, typically around 60 days after sowing/consistent growth. If it gets larger and feels tough or woody, flavor turns stronger and texture becomes fibrous—pick promptly for the best crunch.