Sweet Fennel
Foeniculum vulgare, Apiaceae
Guild Roles
Growing Conditions
Sun
Water
Soil pH
5.5 – 7
Tolerances
Companion Plants
Antagonistic Plants
Fennel root exudates inhibit tomato growth
PotatoSolanum tuberosumFennel allelopathy inhibits potato growth
CucumberCucumis sativusFennel root exudates stunt cucumber growth
English PeaPisum sativumFennel root exudates inhibit pea growth
French TarragonArtemisia dracunculus var. sativaFennel's allelopathic compounds can inhibit French tarragon growth and development
Flat-Leaf ParsleyPetroselinum crispum var. neapolitanumFennel's allelopathic compounds can significantly reduce parsley growth and vigor
SpinachSpinacia oleraceaBronze fennel produces allelopathic compounds that inhibit growth of many vegetables including spinach
ChervilAnthriscus cerefoliumFennel's allelopathic properties particularly affect delicate herbs like chervil
WormwoodArtemisia absinthiumBoth wormwood and fennel produce strong allelopathic compounds that may interfere with each other
Common RueRuta graveolensRue and fennel both produce allelopathic compounds that can inhibit each other's growth
Winter SavorySatureja montanaWinter savory growth is suppressed by fennel's chemical inhibition
Common WheatTriticum aestivumFennel produces allelopathic compounds that can inhibit cereal grain growth
Canna LilyCanna × generalisFennel allelopathic effects may negatively impact ornamental plants like canna lilies
Fragrant HostaHosta plantagineaFennel allelopathic compounds can negatively affect hosta growth and development
CilantroCoriandrum sativumFennel produces allelopathic compounds that can inhibit the growth of cilantro and many other plants
DillAnethum graveolensFennel's allelopathic properties and aggressive root system can negatively impact dill growth
Garden CressLepidium sativumFennel's allelopathic effects negatively impact germination and growth of garden cress
Uses
Functions
Edible Parts
Common Questions
What zones does Sweet Fennel grow in?
Sweet Fennel grows in USDA hardiness zones 6a through 10b.
What are good companion plants for Sweet Fennel?
Good companions for Sweet Fennel include Garden Dahlia, Curry Plant, Garden Tulip, Stinging Nettle, Flaming Katy.
Design guilds with Sweet Fennel and see companion relationships visually.
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