Edinburgh said:

At this time of year nursery pots hold water longer, and the sides of fabric pots sometimes dry out, but you can lower your pH by putting a small splash of white vinegar in a 16oz cup of water stir and give plant, go easy you can always repeat, to raise pH a bit of baking soda stirred in a 16oz cup of water same drill, or you can go to your hydro store or net and buy pH up/down.

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i have ph up and down. according to a few
on this post they say dont mess
with either. im in soil on a few and usually ph to about 6.4 on feeding days i have to use the ph up and on water days i have tonuse the down as i use RO water. but i am use it a cheap soil ph meter. probably not at all accurate. it says mid 7 to 8 for soil ph and im all like “sheesh! i just fed year and the ph of that was 6.4…how
in the hell did it go up in one day!?”

TSD said:

I personally alternate nutes and plain water.

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and you do not use any ph up or down? so one day it will be mid 5’s (nutes) and the other probably a mid 7 (plain water)?

JodolphBitler said:

and you do not use any ph up or down? so one day it will be mid 5’s (nutes) and the other probably a mid 7 (plain water)?

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No, but I'm only indoors for like 3 months till spring. If I were indoors for a full cycle, who knows, maybe I'd run into issues and need to worry more about Ph. My well water is around 6.5 out of the tap. Water from the rain isn't getting PH up or down and plants seem to be fine with that lol. Not saying PH isn't important, it is, just less so in a good soil than coco.

JodolphBitler said:

hey y’all. im growing indoor in fabric 3 gallon and 5 gallon bags in soil. mother earth terecraft. since i have switched from plastic pots I usually don’t have watering runoff. plants look greats with no deficiencies as i can tell. i do a feed feed water cycle. I ph to 6.4. i bought a ph moisture and light meter for the soil to keep tabs. the next day or days after a feeding or watering the
ph is always anout 7.3- 7.8. why is this? i have even lowered my feeding ph to 5.9-6.0 thinking this would help but the next day it goes back up. is this because the plant is actually using up all the nutrients and leaving the remaining moisture? i use GH flora series. great white mycorrhiza and flower fuel and unsulfered molasses. be worried or just natural. thanks.

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I use Coco I know 7.0 is where you should be watering in soil . It's pretty common for soil . If you have no runoff , the nutrients are building up crystallizing salts etc. I,d seriously do 7.0 pH water only with 20% runoff check your ppms and your pH of runoff . I don't know how long they've been growing but if you've had no run off and they're in 5 gallon pots I bet your PPM meter will say ERRER check your runoff It will tell you exactly what's going on , remember you watering the pot not the plant , does that make sense

In your first post you mention your plants look great with no deficiencies!

Why would you even worry yourself about it. I've grown pretty much last 20 years (minus a few years) and have never used a Ph meter until recently.

Soil likes Ph between 6.5-7.0. My water here is high alkaline at 7.6 ph. If I used my tap water calcium would eventually clog the roots but before that I would have ph lockout.

Some nutrients won't metabolize over 7 ph. I used Walmart spring water for twenty years but now they gotta change it to neutral 7 ph (7.10 actually).

A friend of mine went to adjusting his ph all the time and eventually got ph lockout enough times and they died.

If it ain't broken don't try and fix it. Sometimes less is more.

IMO worry about the ph you put in and if no prob showing up on leaves don't worry about what is coming out. With Hydro different and those guys the experts on ph.

I decided since can't use my tap water and can't buy 6.7ph water anymore and wasn't about to ph down my regular water daily I bought a countertop reverse osmosis machine for like $250 from Apec. Takes 17 minutes to make a gallon but my plants love it.

I get 600-800 gallons before I have to change a filter (more like 500 for our water here). But been paying $1 a gallon so after 250 gallons my water just got a lot less expensive.

If you know the ph is good then don't have to test because you know you are putting in the correct ph water. Mine with very small amount of Epsom salt is 6.5 -6.7 ph.

Hope this helps.