I stick to my normal feeding schedule with biobizz, switching to flowering nutes as usual. Once you have pollinated, there is a slight uptick in Nitrogen need as the seeds are setting up, but the biobizz schedule maintains a low 'grow' dosage along with the bloom anyway.
That Chernobyl is something else. Original cut was sourced by @GGGhe has been quiet on 420sa but one of the OG’s. He flowered this cut for 14 weeks. Some of the best smoke I have had.