Giant Fennel (Ferula communis)
Ferula communis, or Giant Fennel, is a tall perennial herb featuring bright yellow, umbrella-like flower clusters. It thrives in full sun and well-drained soil, offering
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Sunlight
Requires full sun for optimal growth and flowering.
Watering
Drought-tolerant once established; water sparingly.
Soil
Well-drained, sandy, loamy, or rocky soil
Temperature
Prefers warm conditions but is hardy to moderate frosts.
Habitat
Outdoor
Fertilizer
Minimal fertilization needed; thrives in poor to average soils.
Care Requirements
Requires full sun for optimal growth and flowering.
Drought-tolerant once established; water sparingly.
Established plants
Well-drained, sandy, loamy, or rocky soil
Prefers warm conditions but is hardy to moderate frosts.
Growing season
Outdoor
Minimal fertilization needed; thrives in poor to average soils.
Early spring (optional)
Plant Overview
Plant Type
Herb
Plant Category
Ornamental
Plant Place Type
Ground, Garden
Plant Environment
Outdoor
Lifespan
Perennials
Plant Height
1.5-3 m
Spread
0.6-1 m
Growth Rate
Moderate to fast
Dormancy
Winter deciduous
Leaf Color
Green, Grey-green
Leaf Type
Finely dissected, fern-like
Flower Size
10-20 cm (umbel diameter)
Optimal Sunlight Lux
75000
Image Gallery
- kingdomPlantae
- divisionTracheophyta
- classMagnoliopsida
- orderApiales
- familyApiaceae
- genusFerula
- speciesFerula communis
Toxic for humans
Yes
Rating: 7/5
Toxic for pets
Yes
Rating: 8/5
Edible
No
All parts of Ferula communis contain coumarin derivatives, which are anticoagulant compounds. Ingestion can cause internal bleeding and hemorrhages, particularly in livestock, leading to a condition known as ferulosis. It is toxic to humans if ingested.