Rich, well drained soil generously amended with compost. In clay soil, use raised beds.
Seedlings are frost tender, but mature plants tolerate light frost.
Feed every 3 weeks with a liquid organic fertilizer, and use a rich, biodegradable mulch such as grass clippings.
Single Plants: 11″ (30cm) each way (minimum)
Rows: 9″ (25cm) with 1′ 1″ (35cm) row gap (minimum)
Sow and Plant
Start seeds indoors, or sow in shallow furrows filled with potting soil. Thin seedlings to 12 inches apart when they are 3 weeks old. Chop the pulled seedlings into salads.
When the bulb is the size of an egg, surround it with 6 inches of loose mulch to help it plump up.
Snip tender young leaves as needed in the kitchen. When the bulbs reach 3 inches in diameter, pull them and store in the refrigerator.
Grows best in cool weather. In some climates, fennel grows better in fall than in spring.