Selma Fino Fennel
A high-quality bulbing fennel with fine flavor and strong bolt resistance. Very white bulbs ready in 80 days, or less if you want to harvest over a long period. Bolt-resistance means you can plant in spring as well as fall, though fall crops are usually bigger. Generally, wild fennel and those grown for leaf or seed are perennial, while the bulbing fennels last only one season. Selma Fino is known for having some plants perennialize.
If you plan to experiment with perennializing, you will need to figure out how and when to harvest. It seems likely that the roots will overwinter after you cut the bulbs if the timing is right. You'll want to harvest before a hard freeze; fennel tops will freeze out at about 20 degrees. The bulbs will keep for a long time in the fridge after harvest. You might want to cut at various heights and ways, to see which works best. Grassroots research! I'd love to hear and share anything you find out.