Plants are slower to get IDs than some other taxa, for various reasons. One of the best ways to increase the likelihood of identifications is by taking the time to make sure that the images IDers are working with are adequate.
This is a handy tutorial https://forum.inaturalist.org/t/presentation-how-to-photograph-plants-and-more-by-lena-struwe-and-peter-nitzsche/15143 . There are others.