Keep in mind, that 110% is technically a range from Allowed Depletion (standard set at 50%) up. So 0% on the moisture graph is actually matches the 50% allowed depletion (or whatever you have AD set at. Again, these are values based off some really fancy algorithms in Rachio that a couple people in the past (with systems dialed in) have found to be pretty darn accurate. In the link below, you can see that @gaustin used some really nice commercial equipment to show that when Rachio saw 0% moisture and 110% moisture, what that actually correlated to in soil moisture. Your soil is filled with air, soil, and water, so the only way to have a true 100% would be to measure under water…Your soil probe is going to show totally different percentages than Rachio.
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