4 week flowering advice

I have been using only the botanicare line since I started and I made it to the 4th week of flowering with only minor lime color ontop of plants with moderate budgrowth for Atrain. so anyways they told me Budswell worked well from the guano company but my nutrient store doesnt have that so I got roots organics HPK 0-5-4 is this a safe product? the budswell was 0-7-0 do I need the pottasium am I gonna kill my plants Ive heard there very finicky. does anyone have any ideas what else I could use she had like bud candy bud blossom and some other thing I also got sweet and the original pure blend metablic bloom formula 0.5-0.5-1.0 I think this is just the pureblend bloom not sure though. Some charts say to cut down on the pure blend at the end but the bottle says use whole time. agian any info on any of these subjects much appreciated

black strap molasses is good really helps plants get fatter buds

I read somewhere that the hpk is for finishing and last 4 weeks thats 2 weeks away should I take the time to get a high phoshpate nutrient0-7-0 our just start them on the HPK ???

Thats it wtf so ur saying none of these nutrients I even need is the bat guano phosphorous not good just molasses??? what about sweet can I use that when im flushing

26 day of flowering leaves still lime little crispy added sweet aquashield hp2 0-4-0 karma and botan flowering buds seem to grow but still all white hairs said 65 days flowering im not so sure wish someone with some knowledge of root organics HPK 0-5-4 would respond and can I use sweet botanicare when Im flushing thanx