How to grow Florence Fennel from the Supermarket. You’ll never need to buy fennel ever again. Florence fennel is closely related to the herb fennel but is grown for its delicious swollen stem. However the edible foliage has the same distinct aniseed flavour as the herb and is often used with fish dishes. It is unlikely your new florence fennel plant will produce a new swollen stem but you can keep cutting the foliage for flavouring food. #growyourgroceries #growyourownfood #gardening #florencefe