I will say on other threads I have knocked the PH meter too. But that’s only for Organic soil that I create and balance out. I wouldn’t use the PH meter to measure runoff, for the same reason RHarris is somewhat stating. It just sends you down a rabbit hole of problems. Instead I lean to check and read problems ahead of time.The reason we notice these things is because the plant is telling you something is up. This happens with everyone if they are using the meter or not. Obviously… Cause it sounds like the majority do.
But growing in supersoil that I created, there is no quick fix, there is time when growing photoperiods, but with autos you do not get that luxury. So I’ve had to learn to get quick judgments on my own grow. Only because I know what I put in the soil and what’s lacking. So the meters really does me no good. I do use the stem meters a lot because I know what’s in the soil already so I have learned how to read it by sticking it in the soil and I have one that measures nutrients, no it will not tell you what you are missing, but when I do top dressing soil separately. I know what nutrients it’s measuring out. Same for veg nutrients. I don’t add all the extra in during feed, just ph’ed water.
Then I top dress twice. Once 2 weeks before flower. Then again 2 weeks into flower adding in micros in the form of booster. This is the only time I use anything other than regular water. Then I go back to just ph’ed water week 7. Does the meter accurately measure runoff, I say no if you are growing organic, if you are doing Coco/perlite for a medium I do feel it is necessary. On another note why grow in an organic medium, if you still plan to shove all the extra money into nutrients. If you need all the extra then something is wrong with your soil in my opinion.
I agree Fox Farms is crap. They even tell you that their measurements are off for nutrients, and their soil is inconsistent and crap. Learn how to build your own soil. I also recommend that you have a bin with the ingredients you will need for top dress done as soon as you start your grow. This way you can keep the bloom ingredients where you need them. I am not a professional, me and Dbrn jave had a few disagreements on a process or two. But regardless I respect his knowledge and he has been right wayyy more time then off. I do agree that RHarris has said some things that had me scratching my head and I also agree with some things he said.
But what Dbrn was trying to tell you RHarris is your orginal measurements should be precise of you are feeding, because the roots are pulling the ph’ed feed almost instantly, all the salts that were built up will wash down. If those salts and oter readings are high. Your root system may not be pulling everything in. If it wahses too low you would need to increase. I always say, if you can do autos in your organic soil all the way through, you have found your soil balance. So now you can determine if it’s lights, temp, humidity, ect.
During this grow I only used Ph’ed water until second week of flower. I top dressed for flower during week 3 since they are autos. For photos I do it one week before flipping to flower then on both I do it again in the second week of flower. The second top dress I star with boosters. I use
Big Bud till week 6 and B-52
Week 6, I swith to Overdrive B-52, and bud candy up to the end of week 7. From there I just returned to water no longer ph’ed because I am hoping to lock-up the roots. Or I flush. But I am experimenting with the flush, personally I am liking it because in my opinion and everyone else’s says I’m crazy, but after the flust with Flawless finish, my trichomes seems to redden a little faster. But it could be wishful thinking on my end. But hey it makes me feel better😅