Just flip straight to bloom, ONE extra feeding of growth feed isn't going to be detrimental to the outcome.
They WILL drink maybe 2x as much feed while in bloom, or so it seems anyway so just keep an eye on your soil before feeding again.
Wont be a problem until you near week 2 of flower, but when that happens just make sure the soil isn't wet before feeding them, as some days they will suck the soil/medium dry and others they wont suck as hard.
Listen to your plants rather than reducing/increasing the amount or how often you feed, if they are doing fine one feed per day then don't increase but if the soil is always dry after hours or work then don't be afraid to re-feed i find myself feeding before work and by the time i get home my coco is dry as a nun so i feed again.