Need help please. Getting worse brown spots yellow leaves

Hey there guys. I’ve been trying to identify the problem here for a couple weeks now and it’s still slowly getting worse.

Noticed some yellowing of leaves and then noticed the whole plant has turned lighter green than its sister of the same strain since the beginning of flowering.

I have been using distilled water so after posting here a week or two ago I got some Cali-magic and have been feeding with that since. Next I checked my ph after a good flush a few days ago and she was sitting 6.5.
They are under a 900w led in 5 gallon fabric pots in soil.
I’ve been using “the stuff” bloom nutes (1.1-1.7-4.2) since day 14 of flower. It is now day 32. Oddly enough the buds on the affected plant are growing fatter than the other plant (but I did defoliate the sick plant more).

Here is some pics. The hydro store guy says a PH problem other are saying magnesium, calcium. Please help?

Looks like you're overfeeding, tone it back until the clawing goes away.

I know I overwatered the last feeding a few days ago to get the ph’d water in and get a reading from the runoff. I typically wouldn’t water until the pots were pretty light. Same regimen for the sister and she is looking good.

ZERO REASON to check runoff if you “ range “ the ph to the proper ph needed for the medium used.
If it’s good going in ... then you are fine.

When you water to the point of runoff , you are ACTUALLY overwatering just to get runoff.
I hate that distilled bullshit water ..... your house plants don’t need it , so why would your weed.
Calmag is a good toolbox fix “ when needed “ but if you are starting with stripped water and trying to add what’s missing just complicates shit. I use strictly tap .... most municipal water sources have calcium and mag in it , so tweaking is minimal , if at all.

Only the ph of it will need to be adjusted for use. Leave the distilled water for your steam irons .

Does your lawn need or use distilled ?

Leaves WILL fade from bottom first ( older ) during flower as plant pulls from its reserves.
Since you are technically LEACHING your medium just to “ check “ it creates unbalanced issues in medium . This is what is causing the leaf issues. As the medium is being rinsed .... it strips it.
The tip burn is nominal and is an indicator that feed is about right.

Led / blurple require less feed and watering as plant does not transpire as quickly as with say hps lights .... so watering and feeding can be spread out more INSTEAD of being on a schedule.

After about 3 weeks of actual flower you can go with a bloom nute ( low N ) as it will want more PK instead. This is about the time stretch and branching have pretty much slowed and flowers are bulking. By week 6 , a very large portion of N is pretty much done as it will not be making any leaves or branches anyways. Then in later weeks before harvest , you can ween down the feed so it can be a cleaner product without excessive feeding. Believe it or not the medium will have enough to finish it even with a water only diet the week before chop.

It’s really simple.

Budzbuddha said:

ZERO REASON to check runoff if you “ range “ the ph to the proper ph needed for the medium used.
If it’s good going in ... then you are fine.

When you water to the point of runoff , you are ACTUALLY overwatering just to get runoff.
I hate that distilled bullshit water ..... your house plants don’t need it , so why would your weed.
Calmag is a good toolbox fix “ when needed “ but if you are starting with stripped water and trying to add what’s missing just complicates shit. I use strictly tap .... most municipal water sources have calcium and mag in it , so tweaking is minimal , if at all.

Only the ph of it will need to be adjusted for use. Leave the distilled water for your steam irons .

Does your lawn need or use distilled ?

Leaves WILL fade from bottom first ( older ) during flower as plant pulls from its reserves.
Since you are technically LEACHING your medium just to “ check “ it creates unbalanced issues in medium . This is what is causing the leaf issues. As the medium is being rinsed .... it strips it.
The tip burn is nominal and is an indicator that feed is about right.

Led / blurple require less feed and watering as plant does not transpire as quickly as with say hps lights .... so watering and feeding can be spread out more INSTEAD of being on a schedule.

After about 3 weeks of actual flower you can go with a bloom nute ( low N ) as it will want more PK instead. This is about the time stretch and branching have pretty much slowed and flowers are bulking. By week 6 , a very large portion of N is pretty much done as it will not be making any leaves or branches anyways. Then in later weeks before harvest , you can ween down the feed so it can be a cleaner product without excessive feeding. Believe it or not the medium will have enough to finish it even with a water only diet the week before chop.

It’s really simple.

Click to expand...

Way to break it down compared to my two liner, lol.

Thanks for the replies but let me clear up some confusion. I did not overwater until about 3 days ago. Before that I only watered when they needed it. No schedule.

I had not checked ph of water at all until the “flush” the other day as recommended by the guy at the hydro store. That’s why I wanted to check the soil PH to be sure I could rule it out. This issue has been present for 2-3 weeks.

The red spots and yellow leaves are spreading. That is my concern. It is not from stripping the medium as this problem was present far before that. I wait until the pots are light and I can’t feel moisture in the top 3-4 inches. To water.

It seems once one of the leaves gets those spots it and then begins to yellow out.

IMO
Let her dry out.... a lot
Ph and ppm your tap water, adjust to high 6’s add 1/2 teaspoon of a calmag and feed her that..... about a solo cup full.... trim her back some to get air flow...
FIRST RECALIBRATE YOUR METER... this can cause major problems. Good luck

Another fact to consider, the pH of runoff does not give an accurate representation of the pH of the soil itself.
There can be drastically different readings from, runoff, and say a slurry test, or a pH reading from a quality digital soil pH probe.
Runoff pH in soil is extremely misleading, and should be ignored.

Heatstroke said:

the “flush” the other day as recommended by the guy at the hydro store.

Click to expand...

Don't listen to "The Guy" at the hydro store.

The only green the hydro store guy is interested in is your cash.

Excess calcium can cause the issue you are posting about.