Direct seed from mid– spring through early summer.Can also be transplanted with care as disturbing roots can cause bolting.Sow seeds .6-1 cm deep and keep moist. Space plants 15 cm. apart in rows spaced45 cmapart. Water and feed regularly for best results. Harvest foliage throughout the season and harvest bulbs when they swell to 7-10 cm. If bulbs become too large they begin to toughen.
(For leaf fennel: Harvest foliage throughout the season and harvest tasty seeds when they have dried and turned brown. Perennial zones 5-10)