water it!!
looks like wilt. Stop feeding when unsure, but never stop watering.
so, saturate it fully. It may be difficult if very dry in spots.. make sure it is evenly wet -- check weight to see if normal. After that water or fertilize when top 1" is dry.. easy as pie.
Now, since it all evaporated, i would stick to water-only and at a correct pH range for the first irrigation. (assuming this is soil.. if coco, you do not wait for top 1" to dry.. go by weight. keep it a little moist on top or just the top layer turning that lighter brown with coco.)