Fox Farms soil pH?

[Emilya Green]

If my runoff is reading 3000ppm should I flush soft ph water until the readings are lower to get some of that salt build up out from the hard water or should I water as normal with a tad bit of runoff? Soil is fox farm with a little royal gold and natures living soil mixed in the bottom layer. Thank you! You been a big help and I appreciate it

I don't know anything about your runoff and can not interpret anything from your number. Measuring runoff ppm or pH in soil is a meaningless number. Based on that arbitrary number I would not take any action. Just water as normal at the proper pH with a little bit of runoff, and if you start noticing a slowdown in water uptake due to a salt buildup, then flush with 3x the container size of water.

 

[Cannalove420]

Thank you

 

[Oldgrower54]

If your still gathering info, Pulled a slurry test 10/5/19, distilled H2O(7.1pH/0ppm, Happy Frog @ 2:1, set 24 hrs, strained thru tea,coffee filter once. 6.8pH/611ppm.
I'm using a 10g fabric pot, and put it out in a 2 day drizzle,( 6.5p/4ppm) the soil was damp with very little run-off, slurry test results,10/25/19 6.6pH/707ppm.Don't know if this is residual or not, Hope this helped.
I have a couple questions please:
FFHF is recognized as a"cradle to grave" medium on every site I've visited. Going further, most growers on forums don't apply til week 5/6 into the veg, FF's schedule has application from almost day one. Being green to indoor growing, you'll pardon my confusion.
I'd like to drop my soil pH a few more points. I have on hand: fast acting Sulphur(Ca12%/S33%),Aluminum Sulfate(S 16%). What would be your choice?
I read your opinion on using well water vs RO, My tap 7.1pH/298ppm. I'm sold on the RO, You mentioned citric acid as a lowering agent, will grape juice concentrate work? Do either affect the "microcritters" living in the soil?

 

[Newbie1212]

FFOF & PH runoff in mid-5's. Added perlite & dolomite lime - about 5 TBSP per 5 gallon soil, then top-dressed with 3 more TBSP and the soil PH WILL NOT COME UP!! Have 5 week old autos that I fed 1/4 dose of medi-one and cannot get PH up whatever I do. Semi-flush with 7.2 water and PH still came out at 5.5! Really discouraging. Last run with same soil, perlite and no dolomite had no issue.

 

[Newbie1212]

FFOF & PH runoff in mid-5's. Added perlite & dolomite lime - about 5 TBSP per 5 gallon soil, then top-dressed with 3 more TBSP and the soil PH WILL NOT COME UP!! Have 5 week old autos that I fed 1/4 dose of medi-one and cannot get PH up whatever I do. Semi-flush with 7.2 water and PH still came out at 5.5! Really discouraging. Last run with same soil, perlite and no dolomite had no issue.

 

[013]

Hey VG,

It looks like there may be issues already with folks testing runoff and reporting that info and not doing a proper slurry test. I would be suspicious of readings taken from soil probe type ph meters. You might need to define the proper slurry test protocols to get accurate input.

Edit to add:

Hey newbie1212, this is an old post from last year, I jumped in on another grave digger post without checking dates

 

[Newbie1212]

My plants that have a better PH run off reading are doing much better than the ones with extremely low PH runoff, so I would say that runoff does mean something! Slurry test is not so easy to do when there isn't a ton of soil to spare in the pots.

Edited to add that these older posts still show up on google searches and are still helpful to people!

 

[013]

No need to search there, its all here!

 

[SmokingWings]

No need to search there, its all here!

Most people find out about here after starting a search there.

 

[SmokingWings]

My plants that have a better PH run off reading are doing much better than the ones with extremely low PH runoff, so I would say that runoff does mean something! Slurry test is not so easy to do when there isn't a ton of soil to spare in the pots.

Edited to add that these older posts still show up on google searches and are still helpful to people!

Is there a reason why the soil used in the slurry test cannot be put back?