These are looking brand new now Paul, jobs a good en. Ive always used pk13/14 and when i tried summink else pk wise i always tend to go back to it, i use it for last 3 weeks before they go on water its always been best stuff in pk range i find, that said on another note though my current grow ive used a product called shooting powder for last 2 weeks before i flush and im quite impressed with how plants have reacted to it, this stuff is some crazy mofo high pk booster summink like 39P/25K and it supposed to send plants into overdrive and tbh i think it may have done what it says on packet this time for change i can really see a difference in bud size. I got 5 packs for under £20 on e-bay, House & Garden do the original stuff but ive used this company who made this for time now and it was a lot cheaper, same stuff different maker basically.  Shall defo be using this stuff again if bud smokes nicely
Other vitamin, hormone, enzyme and amino typo boosts to use alongside it well theirs loads and they usually cost a fortune the robbing gits. These days i use seaweed juice which costs pennies in comparison.

E-Bay about a tenner. What with it being organic I wouldn`t let a mix stand for over 5 days with this stuff, usually my mix is gone in 2 to 3 days i then don`t repeat till week after so 2 to 3 days with and 4 or 5 without, tbh it only needs a blast once or twice weekly with the stuff, it goes a long way. A great root tonic for seedlings too, i also do the wet paper towel thing with this stuff and water mix to crack seeds.