Stick answered grow question 4 years ago Hi @NOJON! As mentioned by @Athos, these are quite the same, the only difference is that PK13-14 is slightly more concentrated (0-13-14 VS 0-9-10). I would go with GreenSensation, just to stick with Plagron products range. You can start using GreenSensation from the 4th week of flowering (week 11 for you), with 1ml/L of water, and keep going until the flush. Hope this will help, keep us up-to-date and happy growing :facepunch: