Keep a small capillary-mat tray watered – Automatically!
The surface Blumat sensor rests on the capillary mat and supplies water from the attached plastic globe, adding moisture only as the mat begins to dry. It doesn't hold as much water as the glass version but saves some of the cost.
It also gives small plants a simple, low-maintenance water supply without guessing, frequent hand-watering, pumps, or electricity. If you do add water manually, this will help you see when to add more and how long the tray has gone without water. You can also use a plastic bottle.
