I've got a 'Bloom' fert for soil with NPK of 15-7-30. My buds aren't very big after 5 weeks of flowering. Is the NPK balance right? easy...
go with something that has a higher middle # like a 10-60-10 or a 15-30-15 The first # represents Noitrogen which aids in fast green growth The middle # represents phosphorous which aids in bigger, better brighter, blooms and flowers The third # reps potassium which aids in root structure, stem structure and overall good plant growth.
10-52-10 or I also use KABLOOM! which is organic. The second one is quite expensive bud works remarkably well.
seriously Sid, its the best damn bloom product I have ever used and leaves no taste of chemical or anything else for that matter. Used it once right up until 5 days before harvest. Did not inhibit the pot in tast or the way it burned. Bloody expensive though. Its around $45 Canadian for about 500Kg package. I pay about $40 for a 25LB sack of 10-52-10.