Arrowhead vs Watercress
Both are Aquatic. 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.
Arrowhead
Watercress
| Measure | Arrowhead | Watercress |
|---|---|---|
| Season | Kharif | Perennial |
| Sowing window | Apr–May | Sep–Oct |
| Days to harvest | 120–150 | 50–70 |
| Spacing | 45 × 45 cm | 20 × 15 cm |
| Soil pH | 6.0–7.5 | 6.5–7.5 |
| Water | Ponded 15–30 cm | Flowing water |
| Temperature °C | 18–30 | 10–20 |
| Seed rate | Corms | Cuttings |
| Yield | 8–12 t | 20–30 t |
| Watch for | Leaf beetle, rot | Leaf spot, aphid |