// Free tool
Plant watering calculator
A practical starting interval for your houseplant — based on what it is, the pot it lives in, the light it gets, and the season. No sign-up, nothing stored.
Every plant and home is different — treat this as a starting point, not a rule. The finger-in-the-soil test beats any schedule.
// The method
How the interval is worked out
Each plant type starts from a typical base interval — succulents store water and want long dry spells, tropical foliage prefers a steadier rhythm, herbs dry out fast.
The base is then adjusted for your conditions: small pots and bright light dry soil faster, large pots and low light slow it down, and almost everything drinks less in the dormant months. The result is a range, because the soil check always outranks the calendar.
What changes the rhythm
Drainage & soil
Free-draining mix and a drainage hole let you water confidently. Dense soil holds water — and risks rot.
Heat & humidity
Warm, dry rooms pull moisture out fast. Radiators and air conditioning both shorten the interval.
Season
Most houseplants slow down in autumn and winter and need noticeably less water than in the growing season.
// FAQ
Common questions
How often should I water my houseplants?
It depends on the plant, pot, light, and season — anywhere from every few days for herbs in summer to every three weeks for succulents in winter. The calculator above gives you a starting range for your setup.
Is it worse to overwater or underwater?
Overwatering kills more houseplants than underwatering. Roots sitting in wet soil rot, and the damage is hard to reverse — when in doubt, wait a day or two.
How do I know when the soil is dry?
Push a finger 2–3 cm into the soil. If it feels dry at that depth, water thoroughly until it drains; if it's still damp, check again in a couple of days.
Should I water on a fixed schedule?
Use the schedule as a reminder to check, not a command to pour. Conditions shift with weather and seasons, so the soil test makes the final call.