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The Kitchen Sill Calculator

Your basil isn't just a plant — it's a living calculation. Every leaf responds to light, humidity, and soil moisture with mathematical precision. This tool translates your window's conditions into a care plan your herbs can trust.

Close-up of flowering basil bush showing vibrant green leaves and delicate white blossoms

*Ocimum basilicum* in peak bloom — the target state for your kitchen garden

Enter Your Conditions

Your Basil's Regimen

Water Every
First Pinch Point
Expected First Harvest
How this works: Basil (*Ocimum basilicum*) maintains optimal growth at pH 6.0–7.5, temperatures 70–90°F (21–32°C), and relative humidity 40–60%. Transpiration rate scales with light exposure and vapor pressure deficit. This model calculates soil moisture depletion using the van den Honert water potential framework, adjusted for container geometry. Citation: USDA NRCS Plant Guide OCBA2; FAO Irrigation Paper 56.