Bulb Fennel


Measuring bulb fennel with a ruler

Bulb fennel is a cool-season plant that is grown as an annual crop and considered native to the Mediterranean region. Sicily, Italy, is the primary bulb fennel production region in Europe.The average temperature in Sicily during bulb fennel seeding (November–December) is 55 °F, and during harvest (March–May) it is 63 °F (Weatherbase, 2017). This is similar to the growing climate of Mount Vernon, WA, during the spring (52 °F) and summer (61 °F) production seasons (Washington State University, 2019). The high market value of bulb fennel is also supported by its significant health benefits.

Bulb Fennel Production Bulb fennel cover

This slide show includes temperature requirements, cultivar, planting design, and harvest of bulb fennel.

Research Report

This bulb fennel cultivars that are suitable for production in the Northwest United States.

Our pages provide links to external sites for the convenience of users. WSU Extension does not manage these external sites, nor does Extension review, control, or take responsibility for the content of these sites. These external sites do not implicitly or explicitly represent official positions and policies of WSU Extension.