Hi Kathie,
As a rule the EasyBloom sensor's siren only goes off when your soil moisture is below the recommended threshold for that plant. My suspicion is that you either did not water all the way down to the root zone, or that your soil may be so sandy that the water drains too quickly. As for the thumbs up you alluded to, the soil indicator is actually just referring to how well your soil drains. Also, any feedback you may get before the 24 hours are up is not reliable and should not be used to diagnose your plant. Sorry for the inconvenience. Let me know if you have any further questions! Cheers, Noam / EasyBloom Support