I have had an orange tree (Valencia Orange) for roughly a year now, and it is currently a 30-something inches sapling.
It so far was looking healthy, but in the past couple days, some new leaves it had been making appear to be drooping (is wilting the right term? See picture below)
Is it because it needs more water? (I have it indoors, in my office, and winter in New York can be quite dry. The temperature itself is never too cold, as it's indoors; and for the past week or so I have started misting the leaves 2-3 times a day with a spray filled with plain water.) Or could it be a lack of nutrients, or something else?