So i had slow growing autoflowers on day 80. Im gonna allow upto 100days before harvest so the buds have a little extra time to bulk up,
So I checked my run off ppm at 3000’s on all plants with an average runoff PH at 6.5.
So i decided to correct this by flushing all the plants with PH 6.2 water.
So after the flushing the plants the runoff readings came down to 800-1000ppm on all plants but the issue is the runoff PH spiked to ph7.4. And the more i flushed the runoff ph spiked more even tho i was using ph6.2 / 45ppm water to flush them
How sould i respond to this issue. Now im waiting for the soil to dry so i can add nutes tomorrow once soil drys. But now the soil ph is at 7.4
What should i do to rectify this issue. Currently the runoff ppm is down to 800’s and but PH has spiked and now is at 7.4.
So when i add nutes tomorrow im gonna make sure its 6.2ph. How is this gonna affect the nutrient uptake on the plants.
What is the ph value i should use for the nutrient feeding tomorrow.
My grow in non-organic. With a soil and coco hybrid medium.
@Storm please help out.
From what ive read, you need to get the flush down to 300-400 to correct pH.
You don’t need to worry about ph’ing water if you’re doing a severe flush. That would be a lot of work. Just follow the flush with a lower ph and about 1/2 strength nutes.
I know really nothing with coco besides ph is lower and water a lot. I am a dirty farmer. The coco/mix folk will chime in.
Should i be concerned about 7.4 soil ph runoff with flushing twice the pot capacity in ph 6.2 balanced water. Yet the ph run off kept spiking as i flushed. Soil ph started at ph6.5 in the first phase drainging runoff. So the flushing somehow increased the soil ph. Yet dropped the ppm levels to 1000 from 3000s, Should i let it dry off for few days and check runoff on a few plants randomly to see condition of the dry out medium ph before going in with the nutrient feeding. Will i need to balance off the feeding water ph levels to balance off existing soil ph or should i just go with default ph 6.2 i stick with for the feedings?
Just consider your giving advice on a fully soil medium grown with non-organic nutes. I have compost in the soil as well.
Should i.add some urea to bring soil ph down?
Any inputs and views are highly appreciated.
@OGIncognito , @Lostgirl
Guys i would love your opinions too. Please do jump in
You have some of the best with you already. I am pretty specialized. I can getem up…hehe… fix most soil issues and ph adjustments but lose usable advice outside of pure organic/living soil mediums other than pure basics… I NEVER flush and am stupid simple. From the replies and the people replying I have almost nothing to offer but agreement with them on the parts I can attest to.
Ty for the tag. Always feels good to be included. Cali has been around an age…sirry Cali we are older…
…and Mr Straighty has been pretty tight on simple fixes. Cali is here so the crew will show…lol.
Could you be a little more specific on the brand name of this hybrid coco soil?
With 20 days and this late in flower I wouldn’t worry about it Grow Bro. I water feed the last 2 weeks and don’t PH my water source down and it’s 7.1 
Not using any brands per se. Just generic soil i mixed up, with rich dark soil, compost, coco, vermiculite and small cut coconut husks.
Should i just go with 6.2 ph when feeding nutrients the next time. Or should i rectify and compensate for the 7.4 ph soil with feeding with 5.5ph water so.it buffers to a middle range of about a 6.8ph once added to the soil.
@Caligurl , @OGIncognito , @Mrstraighty
I’m not sure of your mixture of each component but I’ve seen the uncontrollable high pH that no matter what you do will not bring it down past 7.2 and it’s from mixing coco with soil.
I’ve helped several people with this in the last couple of years. However, their mixtures where at least 70% soil 30% coco and/or higher in coco.
Once again I’m not sure if this is your scenario but what happens Is after a certain period of time feeding the soil and coco swings high and stays there no matter if you pH to 4.0 going in it’s still comes out 7.0 plus
The two mediums are not made to work together due to their different pH buffering.
I agree 100% with @OGIncognito , you’re so late in flower you’re about ready to switch over to pure water anyway. I wouldn’t even sweat it.
In the future, I wouldn’t mix coco and soil together. It normally leads to a recipe of disaster. There’s excellent sources of both out there that are cannabis friendly and I would choose one or the other.
So I would consider perlite over vermiculite for drainage as vermiculite retains water.
Best of luck to you
I’m kind of filthy myself
@Caligurl , @OGIncognito , @Mrstraighty ,
Flushing vs not flushing 2 weeks before harvest. Opinions people? 
Personally never could tell a difference, I water feed only the last week or 2. This kind of serves a mini flush
Im only flushing for lockout or to make any pH corrections. Since you are having issues I would probably do it once. Then let it dry out and just straight water til the end.
Wirh this mix, youre nearing a hybrid type soil. The coco and husk are basically a hydroponic type medium. They require a lower pH. Im in str8 coco and watering down around 5.2-5.5 in (I dont monitor out #'s) with no issues. You might want the pH down closer to 5.8-6.0 going in as you water to the end?
This one is a bit longer but it starts around 36 minutes with darkness before harvest
And here he talks about Light before harvest… not dark
Not sure where to start a topic…
I am using 3gal bags, ffhf ocean forest soil. Do i need to add nutrients like dutchpro? Ive done hydro previously, first time using soil. Any advise is appreciated.
I am pretty simple. Organic soil. Worm castings. Perlite. Dry ammendments. Life.