I have a volunteer who’s lovely moringa plant, in a span of two days, changed from growing nicely full of green leaves to looking like this, . My natural assumption would be that it’s too wet, as we’re in the rainy season here in Panama, and moringa here are prone to leaf drop and yellowing due to the stress during the wet season. But this one seemed a little different-- the uniform yellowing/browning and wilty all at once, when it has been raining here for the last 5 months. Most of the trees I know here when suffering from (too much) water stress seem to lose parts of leaves/yellow in certain sections as it gets wetter and wetter.
The plants in question were planted from seed a couple months ago.
Any other thoughts on what it might be, or most likely water stress as I’m thinking?