Wild Fennel Plant Care
Ridolfia segetum Moris
Updated · Sources · How we source care data
Ridolfia segetum, called false fennel, corn parsley, or false caraway, is an annual weed of the Mediterranean region. Its height is 40–100 centimetres (16–39 in).
Every 4–7 days
Full sun to partial shade
60–80°F
40–70%
At a glance
How do you care for Wild Fennel?
Water Wild Fennel every 4–7 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–80°F (16–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
What Is the Wild Fennel?
Wild Fennel (Ridolfia segetum) belongs to the Apiaceae family within the Ridolfia genus.
Wild Fennel displays an upright, branching herb growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Wild Fennel produces small white clustered umbels.
Leaf size: approximately 4 inches.
How Often Should You Water a Wild Fennel?
Ridolfia segetum requires watering every 4–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 4–7 days
Let soil partially dry between waterings
What Light Does the Wild Fennel Need?
Wild Fennel thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Wild Fennel Prefer?
Ridolfia segetum grows best at temperatures of 60–80°F. Wild Fennel prefers humidity levels of 40–70%.
Temperature
60–80°F
Humidity
40–70%
What Soil Mix Works Best for a Wild Fennel?
Well-draining loamy soil with added organic matter. Good drainage is essential for Wild Fennel to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Wild Fennel?
Feed Wild Fennel every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Wild Fennel?
Repot every 1-2 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Wild Fennel?
Wild Fennel can be propagated through seeds, division.
Is the Wild Fennel Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Wild Fennel, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Wild Fennel?
Wild Fennel is susceptible to aphids, caterpillars, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Wild Fennel Need?
Wild Fennel grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Wild Fennel as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Wild Fennel is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Ridolfia genus — compare its care with other Ridolfia species on PlantoScan.
Ridolfia is part of the Apiaceae plant family — browse all Apiaceae genera and species.
Wild Fennel thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Ridolfia segetum Moris, family Apiaceae (first published in Index Seminum (TO, Taurinensis) 1841: 43 (1841)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Wild Fennel, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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