OGlover1224
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I already told you that you wouldn't be able to lower your ph at this point...i've had the SAME exact problem and you cant fix the ph by flushing, you are just going to stress your plants loosing potency and yield...finish this round without over under feeding (look at the runoff ppm NOT ph) and water when needed...
If you really want to know the reason i would start reading something about base-acid equilibrium outside the cannabis forums...for example many are still convinced that for lowering the ph is enough to water with 5, 6 ph...and this is ridicolous thinking about the complexity of the reactions that happen in soil...even watering too much or too little can drastically affect the ph...
If you want a simple and effective solution to avoid this problems in your next grow:
a) use only pure ro water
b) don't overfeed
c) change to another soil
or keep it simple and USE COCO...This is a very reactive medium and you will be able to change the ph with just one or two phd waterings...
I was actually considering coco before but I don't want to add yet a new element to my newb growing quite yet. But thanks for the tips and I will def keep them in mind for next run. I appreciate all the help I'm getting here and is exactly what I'm looking for to better my growing skills.
I actually see a few issues going on. First and foremost, digital meters do not work with organic nutrients. Digital meters are reading levels of metals in the solution. Organic nutrients, while they do contain metals, they also contain a significant amount of carbon and other particles with a neutral charge, and therefore will not be read accurately by the meters. Now this brings up the good question of how do you check pH in soil? Well that's a good question, and my answer really has been that I don't bother checking when in soil and using organic nutes. Now this is not to say I have not had issues, but I don't fret about them as my results have still always come out where I would like.
On the topic of nutrients, 12 mL per gallon just seems like WAY too much food in a single dose. I see that Bio Bizz actually recommend about 15 mL per gallon at the heavy feeding stages, but I personally would not go that high, unless my plants are totally blowing up. So I don't know if that is any part of your issues, but I always like the idiom "less is more". And if you are trying to flush out excess salts you are actually trying to bring the pH up. Remember 7 is a neutral pH and Cannabis needs a slightly acidic environment. So if you are removing the nutrients that are keeping the pH below 7 the pH will rise, regardless of what the pH of the water you are flushing with is. If the pH drops below the ideal zone, then a flush is what is needed, but if the pH is too high it is likely a lack of nutrient retention within the soil.
Since we are talking about soil, Light Warrior is designed for seedlings and fresh cuttings, it was not really designed for mature plants. It was not meant to hold nutrients the same way regular potting soils would. I would highly recommend a change of soil, in the future, for your mature plants. If you are set on Fox Farm soils, and they are very good soils, I would recommend Ocean Forest. It does already have perlite in it, but more is not going to hurt. In fact I tend to add perlite to any bagged soil I buy. More aeration is not going to hurt my plants, so I am not shy with the perlite. I usually like to have almost a 1/3 of my soils to be perlite, the results for me have been great root growth from my plants. Ocean forest also has a good amount of food for plants, so in the veg and early bloom phase you can use less bottled nutes.
You bring up some interesting points. I didn't know that about the meter but will probably still get one that is under $60. On the bio bizz bottle it recommends 2-5ml per litre so 12 is right at 3ml per L kind of in the middle but since then I've decided to lower that number down to around 8ml per gallon. I also did not know that about light warrior. I knew that it was for seedlings but though the only difference was the mychorizzae and less nutes than ocean forest. But next time I will be using a mix of LW and OF + perlite.
It's a shame that I'm having these problems but at the same time I've learned a lot from this grow and all your guys responses.
Now ill throw out a long shot here and see what you guys think about it. Last run I had used botonicare bloom one time and it shot my ph down quite a bit so I flushed and went out and got the bio bizz I have now. Do you guys think its worth a shot to feed with the botonicare and see if it will lower my soil ph or should I just continue to use bio bizz until flush?