Plant Vigor & Health Estimator

What it does

Despite the name, this does not identify a plant species or read a photo. You hand-enter a few things you can see — leaf shape, leaf color, plant height, and stem thickness — and it applies simple rules to gauge overall vigor, a rough nitrogen status, and how far along the plant is. Think of it as a structured version of a quick visual walk-through.

When to use it

For a fast, no-instrument gut-check on a crop during scouting when you have not yet pulled a tissue test. It is crop-agnostic and deliberately coarse. Do not use it to diagnose a specific deficiency or to identify an unknown plant — it does neither.

How it calculates

• A rule-based estimate from hand-entered traits (leaf color/shape, height, stem diameter); it does not analyze images or identify a species/cultivar.
• Leaf color is used as a rough nitrogen proxy — confirm with tissue or sap analysis before acting.

What you enter

Leaf Shape

Choose from: Broad / Ovate, Narrow / Lanceolate, Compound / Palmate, Lobed

Leaf Color

Choose from: Dark Green, Light Green, Yellow-Green, Purple/Red

Plant Height(cm)

Stem Diameter(mm)

Thickness of the main stem, measured with calipers just above the soil line.

What you get

Health Score(/100)

Growth Vigor(/10)

Est. Nitrogen Status

Maturity Index(%)

Reading the result

Health Score (/100) and Growth Vigor (/10) rise with a taller, thicker-stemmed, dark-green plant; a low score usually traces back to the leaf color you selected. Estimated Nitrogen Status comes straight from leaf color — dark green reads high, yellow-green reads low — which is only a proxy, so a low reading is a prompt to run a real tissue or sap test, not a confirmed diagnosis. Maturity Index is a size-based percentage, not a true growth-stage. Treat all four as directional flags to investigate, never as measured values.

Related calculators

• Plant Stress Snapshot
• Photosynthetic Rate Calculator
• Chlorophyll Fluorescence
• Crop Planner