... heft the pot and see,.. remember how it weighed when first made up and well moistened? I;'m guessing it's been too dry, too often, and that's as bad or worse than overwatering,... give her a good, slow thorough watering, to significant run-off.. ....too dry will cause worse nute salt build-up over time, and that starts a whole new shit-show! Some milder wet-dry cycling is OK, but wider extremes are not wise,... roots hate it, soil 'crobes hate it, pH hates it (big drifts), osmotic hell from lack of moisture and the relative spiking if nute conc. (less water, less dilute)....