Periwinkle vs Senna
Both are Medicinal. Each axis is a percentile across all 538 crops — 80 means higher than four-fifths of the table. Where an axis is missing, the crop genuinely is not measured that way.
Periwinkle
Senna
| Measure | Periwinkle | Senna |
|---|---|---|
| Season | Kharif | Kharif · Rabi |
| Sowing window | Jun–Jul | Jul, Oct |
| Days to harvest | 150–180 | 110–130 |
| Spacing | 45 × 30 cm | 45 × 30 cm |
| Soil pH | 5.5–7.5 | 7.0–8.5 |
| Water | 500–800 | 250–400 |
| Temperature °C | 20–32 | 20–35 |
| Seed rate | 2–3 kg | 15–20 kg |
| Yield | 3–4 t | 1–1.5 t leaf |
| Watch for | Dieback, aphid | Leaf spot, pod borer |