The Grow System
What can you plant along with fennel?
Plant fennel by your kennel to protect you pet from fleas
Fennel does not have many companion plants because its so aromatic
Fennel is often grown as a companion plant for other species. It attracts all kinds of beneficial insects, including many pollinators.
It can also attract certain predatory insects, like parasitic wasps and ladybugs. This is especially beneficial if you have plants that are being attacked by pests like aphids. The predators will feed upon the pests without you having to do any work on your part.
Otherwise, fennel isn’t a great companion plant for other plants in your garden in a traditional sense. It grows so large and aromatic that it can sometimes overpower nearby plants.