The flowers forming is a slow process. It might take another 6 weeks or more before you see a bloom. And yes, it will slow down what you want it to do, that is grow roots. 6 weeks without roots could be trouble in other ways, for one rotting. But I have never had the heart to pluck off the inflo. (flower buds) Unfortunately, inflo will not continue it's blooming cycle once plucked. Keep us posted on your new plumeria.