IDK. Couldn't find any nute schedule on GH's site that remotely looked like yours, for the Flora series. They all show using it in veg. As long as you are sure you're not overdosing on the micro's.
Seems like you would need the primary nutes in the gro formula that aren't present in the micro formula. Otherwise, why get the gro in the first place? Why make it?
Again...IDK. This hydro stuff is way beyond me.

Glad to hear they are looking better, tho.:thumbsup: