Co-1
Developed by Tamil Nadu Agricultural University, Coimbatore, released 1985, through reselection from PF-35 to suit southern growing conditions.
Quick facts
- Crop
- Saunf (Fennel)
- Type
- Open-pollinated
- Season
- Rabi
- Maturity period
- 160–180 days
- Seed rate
- 10–12 kg/ha for direct sowing
- Expected yield
- Medium
- Suitable soil
- Loam
- Release
- Released 1985 · Tamil Nadu Agricultural University, Coimbatore, reselection from PF-35
About this variety
Co-1 was developed by Tamil Nadu Agricultural University, Coimbatore, and released in 1985 through reselection from the foundational PF-35 line, adapting it to southern Indian growing conditions rather than the Gujarat–Rajasthan belt most fennel varieties target. It remains the standard recommendation for fennel growers in Tamil Nadu, at a duration of roughly 160 to 180 days similar to its PF-35 parent.
Key characteristics
Sowing & cultivation
- Sowing timeMid-September to mid-October
- Seed rate10–12 kg/ha for direct sowing
- Spacing45–60 cm between rows
Soil & climate
Soil
- Suitable soil
- Well-drained loam
Yield & maturity
Maturity period
160–180 days
Expected yield
Medium
Actual yield depends on sowing time, soil, irrigation, weather, seed quality and crop management.
Pest & disease considerations
Major diseases
- Moderate
Advantages & considerations
Why farmers may choose it
- The standard, locally adapted recommendation for fennel growers in Tamil Nadu and southern growing conditions.
Things to consider
- Only moderate disease tolerance and a medium yield ceiling next to the newer, specifically blight-resistant Ajmer releases.
Suitable regions
States this variety is recommended for — check locally, since a state can have more than one recommended zone.
- Tamil Nadu
Sourced from: Fennel (Foeniculum vulgare) — variety review. editorial policy.