Skip to content
Vegetables

Fennel

Foeniculum vulgare

Fennel is a perennial herb with a bulbous base and feathery leaves. It is known for its aromatic seeds and edible bulb, which are used in culinary applications. Fennel is valued for its flavor, medicinal properties, and as a source of essential oils.

Calculate System for Fennel
400.00–600.00mm
Water Need
120 days
Season
30.00–60.00cm
Root Depth
25,000 kg/ha
Yield
20,000
Plants/ha

Growth Stages

Season: Mar – Aug (120 days)

Initial
Kc 0.400
30 days
Development
Kc 0.700
40 days
Mid-Season
Kc 1.000
60 days
Late
Kc 0.800
30 days

Fennel can be grown as an annual or biennial crop. Varieties include Florence fennel (bulb type) and common fennel (leaf type). It prefers full sun and can be sensitive to frost.

Water Requirements

Season Total: 400.00600.00 mm
Water Stress Sensitivity: High
Salt Tolerance: Moderate
Water Productivity: 15.500 kg/m³

Recommended Methods

Drip Irrigation90.00%Fixed Sprinkler70.00%

Soil Compatibility

Optimal pH range: 6.0 – 7.5

Sandy Loam
AWC100.00mm/m
Drainagegood
Drainage: Well-drained soils preferred
Organic Matter: 2.00%
Soil should be rich in organic matter. Incorporate compost before planting to improve soil structure and fertility.

Climate Compatibility

Temperature range: 15.0°C – 30.0°C

Temperate Continental
ETo: 1.006.00 mm/day
Temp: -20.0°C – 30.0°C
Frost: high
Mediterranean
ETo: 3.007.00 mm/day
Temp: 5.0°C – 35.0°C
Frost: low
Frost Tolerance: Low frost tolerance
Heat Tolerance: Moderate heat tolerance
Fennel thrives in warm climates. Protect young plants from frost and consider shade in extreme heat.

Planting Layout

100.00cm
Row Spacing
50.00cm
Plant Spacing
20,000
Plants per ha

Nutrient Requirements (kg/ha)

Nitrogen (N)150 kg/ha
Phosphorus (P)60 kg/ha
Potassium (K)180 kg/ha
40
Calcium (Ca) kg/ha
25
Magnesium (Mg) kg/ha
20
Sulfur (S) kg/ha
Schedule: Apply nitrogen in 3 splits during growing season
Organic Matter: 2-3% organic matter recommended

Yield Information

25,000
kg/ha
2.500
kg/plant
0.450
Harvest Index
Quality Factors: Size, color, sugar content

Design Your Fennel Irrigation System

Use our free calculators to plan water requirements, spacing, and system costs for your Fennel field.

Open Calculators

Related Guides

Introduction to Growing and Irrigating Fennel

Fennel, scientifically known as Foeniculum vulgare, is a versatile and aromatic herb that is widely used in culinary and medicinal applications. It is a hardy plant that can be grown in a variety of climates and soil conditions. In this article, we will explore the benefits of growing fennel economically and provide…

Read Guide
Newsletter

Stay ahead of the season.

Get irrigation tips, product launches, and exclusive offers — straight to your inbox.

  • Irrigation tips & guides
  • Product announcements
  • Exclusive discounts
  • Early access to new tools

No spam, unsubscribe anytime.