How a Self-Watering Flowerpot Design Works

A 1947 patent for a flowerpot design that uses a built-in reservoir to keep plant soil consistently moist.

What it covers

The patent describes a flowerpot structure featuring a hollow base that acts as a water reservoir. A porous or absorbent material connects the reservoir to the soil above, allowing water to move upward through capillary action. This ensures the plant receives a steady supply of moisture without the need for constant surface watering.

What it doesn't cover

• —Does not cover electronic or sensor-based irrigation systems.
• —Does not cover pots that rely solely on gravity-fed top-down watering.
• —Does not cover hydroponic systems that lack soil-based growing mediums.

The clever bit

The use of a passive capillary wick system to regulate soil moisture levels without requiring any moving parts or electricity.

Why it matters

This design addressed the common problem of plant death due to inconsistent manual watering. It represents an early step in consumer-focused horticultural convenience, influencing how indoor gardening products are designed today.

Real-world examples

• 1.Self-watering indoor planters
• 2.Herb garden kits for kitchens
• 3.Window box reservoirs