Garden pea Water Requirement Calculator
Work out the seasonal and per-irrigation water requirement of garden pea (FAO-56 ETc = ET₀ × Kc, peak Kc 1.05) for your field, climate, soil and irrigation method.
Protect flowering and pod-fill from stress — these set pod number and pea size. Avoid waterlogging at emergence and root rot in heavy soils. The cool-season crop needs little water in mild winter weather.
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 Garden pea Water Requirement Calculator to turn the FAO-56 crop coefficients for garden pea into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Garden pea Water Requirement Calculator
Garden pea needs 350–450 mm and is most sensitive to moisture stress at flowering and pod-filling. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with garden pea's own crop coefficients (Kc 0.5 initial, 1.05 mid-season, 0.9 late) across a 90-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 Garden pea 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 Garden pea Water Requirement Calculator?
- ✓Uses garden pea'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 garden pea need?+
Garden pea needs 350–450 mm and is most sensitive to moisture stress at flowering and pod-filling. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 90-day growth stages for your conditions.
When does garden pea most need water?+
At flowering and pod development. Moisture stress then reduces the number of pods and the size and sweetness of peas. Early vegetative and final drying stages are more tolerant.
How much water does a pea crop need?+
About 350–450 mm over its short cool-season life, peaking at flowering/podding (Kc ~1.05). In mild winters with some rain, only one or two irrigations may be needed at the critical stages.
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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