What can you not plant with fennel
Mia Walsh
Published Apr 17, 2026
Fennel is a highly aromatic and slightly odd plant that is pretty much a poor companion plant for everything. Fennel companion planting generally only works when growing dill. However, even dill is a poor choice because the two herbs tend to cross-pollinate.
What can you not plant near fennel?
Fennel is a highly aromatic and slightly odd plant that is pretty much a poor companion plant for everything. Fennel companion planting generally only works when growing dill. However, even dill is a poor choice because the two herbs tend to cross-pollinate.
What grows near fennel?
One of the few plants that can survive with fennel is dill, which can offer a stabilizing effect for fennel seeds. Fennel also helps to deter aphids in the garden. Tomato + Basil: A classic culinary couple, tomato and basil also make an excellent pair for companion planting.
Does fennel hurt other plants?
Fennel is a poor companion plant for most herbs and vegetables. While it can grow near dill, the two plants tend to cross-pollinate. As a result, it’s usually best to grow fennel separately; keeping it in a container avoids any possible negative outcomes.Does fennel inhibit flower growth?
Fennel grows tall and will shade other parts of the garden. It also inhibits the growth of other plants, mostly herbs, including coriander and caraway. Fennel and dill are known to cross-pollinate, resulting in inferior quality of both, so keep them apart.
Is fennel an invasive species?
The extremely invasive Foeniculum vulgare is in the carrot (Apiaceae) family. It is native to Southern Europe and is problematic in coastal California and is also present throughout the western US all the way to Texas.
How far should fennel be from other plants?
Plant Type:Short-lived perennial aromatic herbYellow/green, bronzeSpacing:12-18 inchesWell-drainingPlanting Depth:1/4 inch (seeds)Beneficial pollinatorsTime to Maturity:60-90 daysOther Apiaceae family members, especially dillHeight:2-6 feet, depending on varietyApiaceae
Can I plant fennel with roses?
Planting fennel near your roses may keep aphids at bay. Herb fennel grows as high as 8 feet; plant it in the back of a vegetable or herb bed.Is fennel self pollinating?
Fennel plants are self-fertile and bear flowers with both male and female sex organs. Insects can also act as pollinators for fennel. Fennel is grown for flavorful seeds and young leaves that are used to flavor soups, sausages, breads, salads, dressing and other dishes.
Can I plant fennel with strawberries?Herbs – Dill, fennel, coriander, mint, sage and many others are excellent companions for strawberries, helping to repel slugs and other pests. Keep in mind that some herbs, especially mint, should be planted in containers as the plants are aggressive and can easily take over a strawberry patch.
Article first time published onWhat herbs can you plant with fennel?
Tilly’s Nest Guide to Companion Planting ©PlantBest FriendsFoesBasilPeppers, Tomatoes, , Oregano, AsparagusRosemary, SageBeetsBush Beans, Onion, Lettuces, Cabbage, BroccoliPole BeansBell PeppersTomatoes, Basil, Carrots, ParsleyFennel
Can you plant dill and fennel together?
Umbellifers: Dill should not be planted near other members of the Umbelliferae family, like angelica, caraway, carrots, and fennel. Dill can cross-pollinate with some of these plants, resulting in a poor-tasting hybrid.
Where can I plant fennel?
It’s a great option for growing in raised garden beds, containers, and in-ground gardens. Space fennel plants 4 to 12 inches apart, depending on the variety. Grow them in an area that gets at least 6 hours of sun and has fertile, well-drained soil.
Does fennel need fertilizer?
Common Name(s)Sweet or common fennel; Florence fennel, bulb fennel, finocchioLightFull sunWater:Regular, consistentSoilSandy loamFertilizerYoung plants: balanced NPK. Maturing bulbs: high nitrogen feed
Can fennel be planted with tomatoes?
According to our research on fennel, we don’t recommend planting beans and tomatoes nearby.
Does fennel grow back every year?
JanuaryFebruaryMarchSowAprilMayJuneSowSow HarvestSow HarvestJulyAugustSeptember
How do you know when fennel is ready to be picked?
Fennel is ready to harvest after approximately 90 days. Fennel leaves can be harvested as soon as the plant is well established. Only take a few leaves at a time to not cause harm to the plant. The bulb is ready for harvest once it reaches the size of a tennis ball.
Is fennel known by another name?
Several cultivars of Florence fennel are also known by several other names, notably the Italian name finocchio. In North American supermarkets, it is often mislabeled as “anise”.
Is fennel part of the onion family?
Fennel is a member of the carrot family, though it’s not a root vegetable. The base of its long stalks weave together to form a thick, crisp bulb that grows above ground. Above the bulb, at the tip of the stalks, it has light, feathery leaves that resemble dill.
Should fennel be cut back?
Fennel can be cut back early in the season to encourage bushier growth and should be deadheaded for seed harvest and to prevent over seeding of new plants. Harvest and dry seeds as the flower heads fade. … Once established, fennel herb doesn’t need much care.
How far apart should you plant dill and fennel?
Sow seeds in medium-rich soil, in a sunny, protected spot. Continue sowing seeds throughout spring and summer. Don’t plant near fennel as they may cross-pollinate. Thin seedling so they are 12 inches apart.
Can fennel survive frost?
Frost tolerant A short-lived hardy perennial, fennel will survive winter temperatures to 0F/-17C.
What garden plants grow well together?
Type of VegetableFriendsCabbageBeets, celery, chard, lettuce, spinach, onionsCarrotsBeans, lettuce, onions, peas, peppers, tomatoesCornClimbing beans, cucumber, marjoram, peas, pumpkins, squash, sunflowers, zucchiniOnionsCabbage, carrots, chard, lettuce, peppers, tomatoes
What kind of soil does fennel like?
Fennel benefits from a rich, well-drained soil, with a pH of 5.5-6.8. Plant in a sunny spot for best results. Bear in mind that fennel is a Mediterranean crop, a cool-weather short-lived perennial normally grown as an annual.
Why should you not plant cucumbers near tomatoes?
Cucumbers’ and Tomatoes’ Shared Diseases Phytophthora blight and root rot are more serious issues as these disease pathogens can ravage both cucumbers and tomatoes. Plants can be treated with commercial fungicides as a preventive measure, but it’s better to just use good cultivation practices.
What herbs can you not plant together?
- Keep fennel and wormwood isolated from other plants. …
- Rue should be kept away from sage, basil, and cabbages. …
- Anise and dill should not be planted near carrots. …
- Keep dill clear of tomatoes. …
- Sage makes a bad bedfellow with cucumber and onion.
Should I let fennel flower?
Don’t let your bulb fennel run to seed or ‘bolt’. The number one rule when growing this otherwise easy-care vegetable is that you must – and I mean must – keep the roots quenched (though never waterlogged). Water during any dry spells and apply a mulch of grass clippings or similar around the plants to lock it in.
Can you eat fennel leaves?
They’re Tasty! You can use fennel fronds like any tender herb. And if you already bought the fennel, they’re free!
Will deer eat fennel?
Deer usually also avoid root vegetables (which require digging) and prickly vegetables such as cucumbers and squashes with hairy leaves. Cultivars with strong odors such as onions, garlic and fennel are not palatable to deer. … Hungry deer are unpredictable and at times may eat even the most “deer-resistant” fare.
Does fennel like manure?
Florence fennel needs a position in full sun. Both grow best in a fertile, moist but well-drained soil. Dig in plenty of organic matter – such as garden compost, well-rotted manure or other soil improver – especially in very well-drained sandy soils to hold moisture.
What does fennel seeds do to the female body?
A review of 10 studies noted that fennel may improve sexual function and satisfaction in menopausal women, as well as relieve hot flashes, vaginal itching, dryness, pain during sex, and sleep disturbances ( 27 ).