Houseplant watering calculator
Enter your pot size, material and plant type to get how much water to give and how often.
How to water indoor plants
Pick your plant and conditions to get a personalized watering interval, built on a baseline range for each species.
Water your African Violet every
5-7 days
Always confirm the topsoil is dry first. Push a finger about 2-3 cm into the soil; if it still feels damp, wait a day or two.
- Standard conditions: no adjustments applied
How the calculator works
Every species has a baseline rhythm: a monstera wants a real dry-down between drinks, while a Boston fern never wants to dry out completely. The calculator starts from that baseline (the growing-season range) and adjusts it for the four conditions that change how fast soil actually dries.
Bright light, small pots, and terracotta dry soil faster, so the interval gets shorter. Low light, large pots, and the fall and winter months slow everything down, so the interval gets longer. Winter alone can add half again as much time or more between waterings. The result is a range, not a rule.
Frequently asked questions
How accurate is a watering calculator?
It is a strong starting range, not a guarantee. Humidity, root health, and soil mix all shift the real interval, so confirm with a quick soil check before watering.
Why does the season change how often I water?
Most houseplants slow their growth in fall and winter and use far less water, while cooler, dimmer conditions dry the soil more slowly. The same plant can need water half as often in January as in July.