Day 30, a lot of small buds start to appear. Do yo...

Hi, In reply to your question, yes you should switch over nutrients while still giving a very, very low dose of Nitrogen as plants are still growing vertically during the first 3 weeks of flower, know as the 'flower stretch'. Plants require a higher amount of phosphorus (P) and potassium (K) during flower in order to sustain your plants needs in growing nice buds. Just remember to start off with the nutrients on half or even quarter strength of what your nutrient line up recommend and gradually build it up over time, LESS is more. From looking at your picture your soil looks very wet, so to me it looks like you're over watering and those leaves look full. Just make sure you're giving your soil enough time to dry out properly in between waterings as you don't want to suffocate the roots and see how you go. Maybe in the mean time back of the nutrients while you assess whats going on, an just feed with plain pH'd water when the soil has dried out. Hope this somewhat can help you answer the question you asked. Happy growing!

I know this isn’t answering your question but she is showin a lot of signs that she has too many nutes and too much water now. So to me you should eliminate the feed for a few weeks and cut back on the waterings

Hey there I've read many people on here recommend giving both bloom and grow together for a short while, yes lower the amount of grow nute you put in..but not to eliminate completely, yet. Also foxfarm has a week by week guide like every other company and they also recommend the joint usage for a couple weeks in early flowering, at a lower dose of N, and then eliminate.

Short answer : Yes! You need to lower your Nitrogen doses and start giving her blooming nutrients. Start with low doses and see how she reacts. I'll be around, good luck with this beauty!