Jjgrow420
Well-Known Member
Blumat Digital Soil Moisture Meter
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If you want to know actual specific osmotic pressure/turgor pressure you need a proper tensiometer which measures in millibars. This one's pretty decent and easy to read. The higher the number the drier the soil. You can find the optimal number (usually between 80-120 millibars) and keep it around that. Good luck.