Rose Water Requirement Calculator
Work out the seasonal and per-irrigation water requirement of rose (FAO-56 ETc = ET₀ × Kc, peak Kc 0.95) for your field, climate, soil and irrigation method.
Drip irrigation keeping even moisture through each flush is standard; water demand peaks after pruning as new shoots and buds form. Keep foliage dry to limit black spot and mildew.
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 Rose Water Requirement Calculator to turn the FAO-56 crop coefficients for rose into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Rose Water Requirement Calculator
Commercial rose needs 600–900 mm a year of steady drip moisture, timed to bloom flushes after each pruning. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with rose's own crop coefficients (Kc 0.6 initial, 0.95 mid-season, 0.85 late) across a 360-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 Rose 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 Rose Water Requirement Calculator?
- ✓Uses rose'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 rose need?+
Commercial rose needs 600–900 mm a year of steady drip moisture, timed to bloom flushes after each pruning. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 360-day growth stages for your conditions.
How much water does a rose crop need?+
About 600–900 mm a year via drip for field roses, more under polyhouse. Demand peaks after each pruning when the flush of new growth and buds forms.
Why is drip preferred for roses?+
It keeps the root zone evenly moist for continuous flushing while keeping the foliage dry, which is essential to limit black spot and powdery mildew on roses.
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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