I don't use or know anything about FF products, so I couldn't say.

Based however upon the size, you probably don't want to feed much at all.

Wait until the flower hairs show up at the budsites...then you will have an idea as to timing and so forth. You will want a diff. food at that time and then they can use the nutrition.

IT wont be long now, let them grow, and nature's clock is winding down.

FLowering will start soon.