Fennel Seeds - Grosfruchtiger (Foeniculum vulgare)

Grosfruchtiger Fennel (Foeniculum vulgare) is a large, vigorous bulb-forming fennel variety known for its thick, uniform bases and aromatic foliage. This strong-growing type produces swollen white bulbs that are round, crisp, and densely layered near the stem bottom. It thrives especially well in cool to mild climates and performs reliably in garden beds, containers, and raised growing areas.

Naturally Non-GMO and fast-growing in fertile, moist soil, Grosfruchtiger Fennel develops firm bulbs when provided full sun and steady moisture. Ideal for gardeners who want a hardy, productive fennel with excellent bulb size and consistent growth.

Features

• Large, vigorous bulb-forming fennel variety
• Produces round, thick, uniform white bases
• Non-GMO, natural and untreated fast-growing seeds
• Thrives in cool to mild climates with steady moisture
• Suitable for raised beds, outdoor plots, and large containers
• Hardy, reliable growth with strong leafy tops

Specifications

• Seed Type: Natural, untreated, Non-GMO annual or biennial depending on climate
• USDA Growing Zones: Ideal for Zones 5–10
• Sun Requirement: Full sun (minimum 6–8 hours)
• Best Growing Season: Early Spring or late Summer in cool weather
• Germination Time: 7–14 days
• Soil Requirement: Moist, fertile, well-drained soil rich in organic matter
• Plant Height: Approx. 24–48 inches tall
• Bulb Maturity: 70–110 days from sowing
• Growth Habit: Bulb-forming plant with feathery aromatic foliage
• Best For: Raised beds, garden soil, large containers, and cool-season planting

Planting Guide

• Sow directly outdoors or transplant carefully to prevent root disturbance
• Plant seeds 1/4 inch deep in rich, well-drained soil
• Maintain consistent moisture, especially during bulb development
• Provide full sunlight for strong foliage and firm bulbs
• Thin seedlings to 8–12 inches apart after establishment
• Avoid intense summer heat; sow during cool periods for best bulb formation
• Hill soil lightly around the base as bulbs begin to swell
• Harvest bulbs when firm and plump; snip leaves continuously for ongoing growth