StrawberryFragaria × ananassacompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
What to plant with Fennel
Foeniculum vulgare
Fennel grows best when paired with plants that complement its needs. and 51 antagonists to avoid. Every pairing below cites its mechanism — pest deterrence, nitrogen fixing, allelopathy, or shared disease.
Want the full profile? See Fennel botanical profile →
Garden journal paused
Seed links are affiliate — we earn a small commission at no extra cost to you.
II
Keep away from these they fight
51 plantsAmaranthus cruentusAmaranthus cruentusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Cucumis sativusCucumis sativusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
CressLepidium sativuminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
AppleMalus domesticainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Wild CabbageBrassica oleraceainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
AsparagusAsparagus officinalisinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
PotatoSolanum tuberosuminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
RadishRaphanus sativusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Northern Highbush BlueberryVaccinium corymbosuminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Red raspberryRubus idaeusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
CeleryApium graveolensinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Pastinaca sativaPastinaca sativainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Sweet cherryPrunus aviuminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Lactuca sativaLactuca sativainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
TomatoSolanum lycopersicuminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Abelmoschus esculentusAbelmoschus esculentusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Wild StrawberryFragaria vescacompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
Common Grape VineVitis viniferainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
PigweedAmaranthus retroflexusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
SpinachSpinacia oleraceacompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
Daucus carotaDaucus carotacompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
Black elderberrySambucus nigrainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
TurnipBrassica rapainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
SpinachSpinacia oleraceainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Black currantRibes nigruminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Sour cherryPrunus cerasusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Amaranthus hypochondriacusAmaranthus hypochondriacusinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Daucus carotaDaucus carotainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
QuinceCydonia oblongainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Cucumis meloCucumis meloinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
ApricotPrunus armeniacainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Red currantRibes rubruminhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
European plumPrunus domesticainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
PeachPrunus persicainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Lactuca sativaLactuca sativacompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
RadishRaphanus sativuscompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
Coriandrum sativumCoriandrum sativuminhibits growth
Roots or leaves release chemicals that suppress neighbouring plants. Often a one-way problem (walnut → most vegetables).
Cucumis meloCucumis melocompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
Wild StrawberryFragaria vescainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
TurnipBrassica rapacompetes for resources
Management warning: vigorous spreaders or allelopathic plants are best isolated from productive beds unless contained.
PearPyrus communisinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
StrawberryFragaria × ananassainhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
Pumpkin / ZucchiniCucurbita pepoinhibits growth
Management warning: fennel is traditionally grown apart because it can inhibit neighbouring crops and disrupt guild balance.
TomatoSolanum lycopersicuminhibits growth
Fennel exudates inhibit most garden vegetables.
Lactuca sativaLactuca sativainhibits growth
Fennel can suppress tender leafy crops and should be isolated.
Cucumis sativusCucumis sativusinhibits growth
Fennel is best isolated; it can inhibit nearby vegetable growth.
Daucus carotaDaucus carotacompetes for resources
Fennel is an aggressive Apiaceae neighbour and is best grown apart from carrots.
Flat beanPhaseolus vulgarisinhibits growth
Roots or leaves release chemicals that suppress neighbouring plants. Often a one-way problem (walnut → most vegetables).
StrawberryFragaria × ananassainhibits growth
Fennel is isolated from strawberries in traditional companion charts.
Common Grape VineVitis viniferainhibits growth
Fennel is best kept out of productive beds and vineyard understories.
V
Frequently asked
What should I NOT plant near Fennel?
Avoid Strawberry, Amaranthus cruentus, Cucumis sativus, and 48 other antagonists. Reasons vary — allelopathy, shared pests, or resource competition. See the section above for each plant's specific issue.
Is companion planting scientifically proven?
Some mechanisms are well-documented (legume nitrogen fixation, allelopathy in walnut and fennel, nematode suppression by marigolds). Others are traditional pairings with anecdotal support. We cite both, but mark mechanism strength where available.
❦❦❦❦
Endpaper · archive updates
Get archive updates
Occasional email when substantial new content lands — plant profiles, seasonal growing notes, folk-remedy additions. Free, no tracking, unsubscribe anytime.
Newsletter returning soon.
We are rebuilding the update list around a lightweight editorial workflow. New dispatches will resume after the next content review cycle.