After watering the Sustee device absorbs moisture at root level, just like your plant. When the level of absorbed water rises, the indicator gradually turns from white to blue.
It takes about 10 minutes to turn completely blue after watering. You will know it's time to water when the colour changes from blue to white. It's really that simple!
Sustee stays in place so it does not disturb your growing roots.
What size is right for me?
- Sustee size S is best for small or shallow pots with plant roots about 5cm
- Sustee size M is best for pots 12-18cm (4.7 to 7 inches) in diameter
- Sustee size L is best for pots more than 18cm (7 inches) in diameter