First two weeks of flower goes really slow?

I don't know what the deal is, my first week or two seems to start off really slow. From what pictures I have seen on the problem fixing pages it looks like zinc deficiency. seems to happen often. I was thinking maybe dropping my PH a couple days before I throw it in flower?? Read the zinc def happens from too high ph. Was thinking of going to 5.5 PH right at the start of flower, what do you think? What is your first two weeks(or even week before flower) of flower consist of?

You won't see much for the first couple weeks. I had my larger plants showing sex 3-4 days after going on 12/12, with the rest showing sex not long after. I didn't start seeing nice clusters of pistils on my buds until about 2 weeks in. For a little bit I was afraid I had too much light leaking in because they took so long for the buds to develop.