Plant roots and soil use capillary action to absorb water from Cowbell's ceramic spike.

When roots are thirsty, capillary action creates a suction on the Cowbell spike, which causes the pressure inside the Cowbell reservoir to change.

Cowbells are not drip irrigation systems that supply a constant drip over a set time with no regard for each plant's needs.

Cowbells water only as your plants need it.

The speed of watering depends on hundreds of physics and biology variables like plant species, plant height, strength and depth of roots, soil type, temperature, season, sunlight conditions, and even container type (eg terracotta will wick faster than plastic pots).

• Classic 750mL is best for over 6" pots
• Mini 250mL is best for under 6" pots
• Use our free calculator to find the best size
• Or click the lower right chat icon for a custom recommendation

(Note: Your plants will drink more during hot, growing seasons than cold, dormant seasons.)