Purchase healthy plants for a reliable nursery or garden center. Prepare the ground with a cultivator tool, making certain soil is well-drained. As soon as all danger of frost is past, plant bronze fennel two feet apart, adding plant food or fertilizer to the soil according to package directions. Three to four healthy young plants should make a border six to eight feet long.
If you plan to start your own seeds, follow the manufacturer's instructions on the back of the seed packet according to the dates listed in your growing zone.
Give the plants a good soaking immediately after planting to ensure they root properly. Check regularly and water as necessary. Keep the soil moist but well-drained. Watch for slugs and aphids, as bronze fennel is a favorite snack for both.
Trim leaves often for use in salads, egg dishes, vegetables or seafood. Use larger fronds for stunning accent foliage in cut flower arrangements.
Prune aggressively in the fall, deadheading plants before they reseed, otherwise you will need to do lots of thinning out in the spring. Mound up mulch around the base of the plant for added protection during winter months.