I hear ya, alot of times im so excited to see what happens only to be let down. Not cool.
I picked the petals from 5 or 6 large glowers who were dipping really bad. This took a couple weeks, so I froze all the petals until I was ready to transfer into the secondary.
On transfer day I racked onto whatever hops my recipe called for, as well as the petals. I didnt bother defrosting them first, I didnt see the need.
I waited a week or two, pulled out the bags, drained them as best I could (trying to get that sweet hop nectar out) sealed it up for another few days and bottled.
Like I said, I wasn't expecting a sunflower flavor, it was more for the novelty for the wedding. But I am super proud to say everyone loved both beers.