Completely biodegradable & plastic-free color-changing moisture meter for plants!  It's a fun and vivid visual guide to houseplant watering - perfect for new plant parents and anyone learning about how moisture affects their plants' health.
 
It works by absorbing water from the soil just like plants do. When the soil is wet, PlantDoc absorbs the moisture and changes color from white to a green Rhaphidophora tetrasperma design. As the soil dries out, it returns back to white from top to bottom.