💧 Plant Watering Calculator

Find out exactly when and how much to water your houseplants. This free calculator considers your plant species, season, room humidity, and pot size to give you a personalized watering schedule.

How It Works

Different plants have very different water needs. Succulents store water in their leaves and need watering only every 2-3 weeks, while ferns prefer consistently moist soil and may need water every 2-3 days during summer.

This calculator combines four key factors:

• Plant Species — Base watering frequency (succulents vs tropical plants)
• Season — Plants drink more during growing season (spring/summer) and less when dormant (winter)
• Room Humidity — Low humidity means faster soil drying, more frequent watering
• Pot Size — Larger pots hold more water, so they need less frequent watering

Signs of Overwatering vs Underwatering

Overwatering (most common plant killer):

• Yellow leaves starting from the bottom
• Soft, mushy stems
• Soil that stays wet for days
• Fungus gnats in the soil

Underwatering:

• Crispy brown leaf edges
• Drooping, limp leaves
• Soil pulling away from pot edges
• Leaves curling inward

For more plant care tips, check out our low light plant guide or how to revive a dying plant.