That will depend on how many clones you get rooted(small plant like htat not many), the lenght of time you let them veg after cutting. If you go straight from clone to Flower you will probably get a zip or less per plant. And that is 60 + days away.
It's ready to flower, but it's on the small side. Choosing to flower is largely a decision dictated by your flowering space. You don't want to overgrow your lighting or space, but you want to take advantage of it.