How it works

Needs and health

Each day every living thing scores its needs; health follows the score.

Eight needs are scored every day: light, soil water, air humidity, temperature, pH, soil type, food and room.
Inside its comfortable range a need scores full marks; outside, the score falls smoothly with distance.
The scores combine so the worst one counts most.
Health drifts toward the combined score: fast for drought, heat and dry air, slowly for the rest.
Low health slows growth and pales leaves. It never kills on its own.

Stats