Please review our handy plant container sizing guide below. In general, one 750 mL Cowbell should keep most houseplants in up to 8" planters hydrated for at least 2 weeks.
Cowbell may require a refill before 2 weeks if your plant has been chronically underwatered or is in full direct sun.
Cowbell will not overwater your plant. Plants trained on Cowbell only drink when thirsty. That means more Cowbells per plant offers more even water distribution and keeps your plant hydrated longer, so 2 Cowbells in a 6” x 6” planter could last over a month.
We recommend more Cowbells if your plant is tropical or flowering.