Well, I guess in my case the point would be to trigger to grow new leaves a poor meyer lemon that has severe spider mite damage and not too many leaves
. But I'm not sure if I'm going to try it now, because I'm hoping that that tree will start growing on it's own, because it bloomed recently so it should (hopefully) start a new flush soon. It has healthy roots and definitely more than needed to support the poor canopy...
If it doesn't start flushing say after a month, when it's outside I might try this out of desperation. For now I'm just going to prune the ends of branches (therefore remove auxins which means an increase in cytokinins which then should give a new flush).
But if spraying would work, it would be a very good way to get more growing flushes in areas where the season is very short. Because citrus tend to rest between flushes, and it would be great if you could just spray it and cause it to immediately put out new leaves. It would be very nice in a short season outside (say from middle of May till middle of Sept.) to get 3-4 flushes instead of just 2-3, because the leaves on citrus grow much nicer outside compared to indoors. But I guess it's only possible in a perfect world
.
On a side note: has anyone noticed that it's hard for citrus to adapt back from being grown under artificial lighting? This meyer lemon is my third citrus that is not feeling so good after artificial lighting, before it there were two limequats that are out in the trash now...