Megabud THC PK 50-34 when to use? how much?

If I were you , I would just try to google the product , or if you have some instructions follow them Can't say I used so high P-K ratio , but 13/14 ratio I did use , My instructions were : Add in last 4 weeks of flowering , first by 1.5ml/l water , can increase slowly dosage after a week if no nutrient burn or any issues As high as that you have there, probably around 0.5-0.7ml/l water . See what you find about product and use my 1.5ml/l water ratio for 13/14 PK ratio , I didn't have any issues with this ratio