Getting close will instantly improve your flower foreground…most of the time.
There are scenarios where I’ll decide to back off.
One, if it’s windy. With gusting winds, flowers aren’t staying still and I like to look for compositions a little further off to ensure my flowers are sharp (wind also wreaks havoc with focus stacking, see below).
Two, although I enjoy getting super close to flowers, I try not to get blinders on for that type of scene/composition. I always assess the entire area, because there may just be a better composition that includes the flowers, but doesn’t require me to be right on top of them.
Getting close does have challenges as well, like managing depth of field (more on that below).
The image below is a good example of not needing to get your lens tight to flowers –