I have to agree with Dutch.

I get better results letting my soil get pretty dry between waterings. You avoid suffocating the roots by keeping them constantly wet.

This is just a thought, but I suspect keeping the soil dry encourages the roots to spread out more in search of moisture.
stinkyattic Reviewed by stinkyattic on . Soil Moisture Meter I just bought a Rapidtest Soil Moisture Meter that has a range from 1-4 with 4 being the wettest, and 1 the driest. What range would be good for my special plants? On the back it suggests 2-3 for vegetables, and even up to a 4 for tomatos......???????:rasta: Rating: 5