Spinach Water Requirement Calculator
Work out the seasonal and per-irrigation water requirement of spinach (palak) (FAO-56 ETc = ET₀ × Kc, peak Kc 1) for your field, climate, soil and irrigation method.
Irrigate every 3–4 days; leafy greens turn bitter and tough under stress. Water after each cutting to drive quick regrowth. Shallow roots need little but constant moisture.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Farmers and irrigation planners use the free Spinach Water Requirement Calculator to turn the FAO-56 crop coefficients for spinach (palak) into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Spinach Water Requirement Calculator
Multi-cut palak needs only 250–350 mm but very frequent light irrigation to keep leaves tender and fast-growing. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with spinach (palak)'s own crop coefficients (Kc 0.7 initial, 1 mid-season, 0.95 late) across a 60-day season. Pick your climate band (which sets reference ET₀), irrigation method (drip, sprinkler, pivot or surface — each with its own efficiency) and soil texture, and it returns the seasonal water need in cubic metres, the peak daily demand, the net depth per irrigation and how many days to wait between irrigations.
How to use Spinach Water Requirement Calculator
- 1Enter your field area and choose the climate band matching your season.
- 2Select your irrigation method and soil texture.
- 3Read the seasonal water volume, peak daily demand and irrigation interval, then follow the scheduling note.
Why use Spinach Water Requirement Calculator?
- ✓Uses spinach (palak)'s real FAO-56 Kc curve, not a flat factor
- ✓Accounts for drip / sprinkler / pivot / surface efficiency
- ✓Gives seasonal volume, peak daily need and an irrigation interval
- ✓Free, instant and fully in-browser — works offline in the field
Frequently asked questions
How much water does spinach (palak) need?+
Multi-cut palak needs only 250–350 mm but very frequent light irrigation to keep leaves tender and fast-growing. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 60-day growth stages for your conditions.
How often should palak be irrigated?+
Every 3–4 days — leafy greens have shallow roots and grow fast, so they need constant light moisture and watering right after each cut to regrow tender leaves.
How much water does spinach need?+
Only 250–350 mm over its short multi-cut life. The key is frequency, not volume — frequent light irrigation keeps the leaves soft and the regrowth quick.
What is ET₀ and Kc?+
ET₀ (reference evapotranspiration) is how fast a standard grass surface loses water in your climate. Kc (crop coefficient) scales it to a specific crop and growth stage. Crop water use ETc = ET₀ × Kc — the basis of FAO-56 irrigation scheduling.
Is this calculator free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline in the field and your data never leaves the device.
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