The single biggest challenge of any Bonsai enthusiast is getting the watering right, and most Bonsai enthusiasts we know use a moisture meter to help them out.
This Active Air Three Way Meter is perfect for measuring not only moisture levels, but the pH level of your soil and the light level of your tree in lumens as well.
Don't skip getting one of these...they're inexpensive and easy to use. This amazing meter doesn't requite batteries and will last forever. They can be used to detect humidity levels in any soil...even the front yard.