I did.5 ml to a gallon as it instructed but I only had 2 plants at the time which a gallon at .5 ml is enough to feed 25 plants as a folia feed, so I kind of did my own measurement which I cut that in half to 2.5 ml to a half gallon cause the it says to not let it sit for later use, so at 2.5 ml to a half gallon I was able to spray and used the half gallon misting my two plants until it was empty to prevent waste, but I did not saturate the buds I sprayed under the leaves into the stomata and did it in a manner to where the plants was not dripping from over spray, now your moderator say not to used it but I had great results with it and I believe Hammer noticed a big difference in his plants as well, but it's how I used the product . Many will say don't that have not tried it, and many will say don't cause of the chance of causing bud rot being it's a foliar spray, but if you have a lot of air moving in your grow space to where after misting your plants can dry in about 2 hours it should not cause much issues for as bud rot, but I moved 435 cfm with a 6 inch and I had 190 cfm bringing fresh cool air in the balance my pressure inside the small tent I had when I was growing, but as long as you spray when your lights first come on and you don't saturate your plant or buds and has enough air moving for them to dry within 2-3 hours your plants should be fine, and double check for moisture after spraying and if you have to shake the plants to remove excess is a good measure to take to be safe, but it can be done as long as you don't allow your buds to stay wet to long are in dark hours. Just keep in mind to much over spray or moisture can cause bud rot so take added measure to remove excess if need be and try not to over spray and if a half gallon at 2.5 ml is still to much for foliar mix, than reduce it to a liter, hope this helps and you see the results I had when I used the product. Happy growing!!!