Fennel Seeds

Fennel Seeds for Bulbs, Fronds, and Everything Between

Fennel splits into two very different plants depending on the variety, and this collection covers both. Whether you're after crisp, anise-flavored bulbs for the kitchen or feathery bronze fronds for texture and pollinator support, our fennel seeds come from High Mowing, MIgardener, and Southern Exposure, with a mix of organic and conventional options depending on the variety.

Bulb Fennel or Herb Fennel: Which Do You Want?

If you're growing for the kitchen, Florence Fennel and Fennel, Florence are the classic bulb varieties, prized for the swollen, crisp base used raw in salads or roasted as a vegetable. Preludio F1 Fennel is also a bulbing type, bred as a hybrid for more reliable, uniform bulb formation than open-pollinated varieties tend to offer. If you're after the herb side of fennel instead, Bronze Fennel and Bronze Leaf Fennel don't form a usable bulb at all, they're grown for their feathery, purplish-bronze foliage, which works beautifully in ornamental beds and is a favorite host plant for swallowtail butterfly caterpillars. Grosfruchtiger Leaf Fennel falls into that same herb category, grown for foliage and seed rather than bulb production.

Timing Bulb Fennel to Avoid Bolting

Bulb fennel is notoriously touchy about bolting, sending up a flower stalk instead of forming a bulb if it's stressed by heat, cold, or inconsistent watering at the wrong stage. The Seedtime garden planning software can help time your planting around your local frost dates so bulbs are maturing in cool, stable weather instead of a heat spike, and you can add any variety here to your calendar to map it out. Try it free, or compare paid plans for unlimited calendars and succession planning across your whole garden. Paid Seedtime members also get 20% off seed packets marked "Fulfilled by Seedtime."