Kohlrabi Seeds - Giant

Kohlrabi seeds produce upright plants with enlarged, rounded stems that develop above the soil surface. Giant kohlrabi types are selected for extended growth periods, allowing plants to reach a larger mature size while maintaining a compact overall structure. These plants are well suited to cool season cultivation and perform best in mild to temperate climates. They adapt well to open ground, raised beds, and larger containers when grown in fertile, well drained soil with consistent moisture. Giant kohlrabi is commonly grown during spring and fall seasons where temperatures remain moderate.

Features

• Upright plant habit with enlarged stem development

• Suitable for cool season growing conditions

• Adaptable to garden beds, raised beds, and larger containers

• Performs well in mild and temperate climates

• Extended growth period compared to standard types

Specifications

• Scientific name: Brassica oleracea var. gongylodes

• Common name (US): Kohlrabi

• Seed type / variety: Giant

• Growth habit: Upright, compact with enlarged stem

• USDA hardiness zones: 3 to 10

• Planting season: Spring and fall

• Sowing season:

  • Zones 3 to 5: April to May; July to August

  • Zones 6 to 7: March to April; August to September

  • Zones 8 to 10: February to March; September to October

• Germination time and conditions: 7 to 14 days; optimal temperatures between 60 and 75 degrees Fahrenheit with even moisture

• Sunlight requirements: Full sun to partial sun

• Soil requirements: Well drained, fertile soil with moderate organic matter

• Watering needs: Regular watering to keep soil evenly moist

• Mature plant size: 18 to 24 inches in height, 14 to 18 inches spread

• Plant spacing: 12 to 18 inches between plants