First grow ever: micro Hindu Kush Auto

The plant now totally entered flowering stage and is stretching a lot (growing almost 2cm a day...). I switched to the flowering nutrients, on a light concentration at first but I did notice what I identified as the beginning of a phosphorus deficiency right after. Since I have kept my nutes really diluted after a small nitrogen toxicity at the beginning of the grow, I excluded the cause to be some mineral built up in the medium. I came to the conclusion that I needed to increase my concentration of nutes. So I doubled the concentration on the next feeding (which was still half the recommandation from the manufacturer so we're pretty far from really high concentration). The plant seems to like it and is doing really well. I defoliated lightly (only 5 or 6 big leaves), in order to get light to some bud sites. I'm a bit worried about the relative humidity though... Weather got really wet where I live and it's becoming really hard to control RH. It is spiking at more than 70% on some days and I'm really worried that it will be a problem if I don't find a quick solution. I'm amazed by the quantity of potential bud sites this plant is producing... I'm hoping that my light will be strong enough to turn all of them on some quality flowers. Even if this is my first grow, these last weeks confort my optimism and I'm really hoping for a decent yield.