Can any one help with diagnosing yellowing leaves

[Dasnuggster]

Some of my leaves have been turning yellow. Started yesterday. Some are just turning others are full yellow. I tried taking pics before lights got too bright but they all pretty much look like the more clear pics. Some more yellow than others and it looks like its starting from the bottom moving up.

Its roots organics soil. I feed water feed always water when its fully dry. Using roots organic products following their feeding schedule. I couldnt get their hpk so adding a little seaweed extract. Been feeding that since flowering. Itll be five weeks tomorrow. This just started yesterday.
Water with ph between 6.5-6.8. Last watering was at 6.75.
Temps between 70-82
Rh 40-55
Ones a northern lights the other amnesia haze. Both have it.
Kinda slow moving. Affected a cpuple leaves here and there and hasnt progressed too much since. But its only been like 2 days

 

[Pbass]

Hiya @Dasnuggster I'm no pro but that looks like Cal/Mag defficiency. Is that included in your feed or are you adding it?

I'm sure it's close to your water, but do you happen to know the soil ph?

I managed to lock my plants out before causing this yellow/drying by having high soil ph and more importantly less than stellar watering habits. Are you letting them dry thoroughly between feedings?

 

[Dasnuggster]

Yea im adding cal/mag as a top dress.

Not sure the soil ph but i water with 6.5 and the run off comes out like 7.8.

Yea i let the dry pretty well. Dry about 2 inches down and when it feel light when i pick it up.

Yea i thought maybe it was nutrient lock out or lacking nitrogen but the small brown spots on some of them made start thinking it could be something else

 

[Pbass]

Hmm 7.8 runoff seems to me that indicates your soil is hot? We should be down around 7 or a bit lower I think. That could be locking out your girls from taking up the nutes right.

I'm not experienced with top dress, but I can tell you my girls need LOTS of cal/mag under the indoor lights. I don't know how fast or well that absorbs compared to liquid.

AS far as watering goes, water level and weight is a bit relitive to what you are used to. How often do you water?

 

[Dasnuggster]

Yea i was thinking of just getting some liquid cal/mag so i know how much and how fast they are taking it.

Im watering about every 4 days right now. Also idk if it made a difference or its just coincidence but i was watering with declorinated tap water up until the last 2 watering. I used bottled spring water for the last 2 waterings.

 

[Pbass]

I'd say you need get a handle on your PH, how I am not sure. I also think it could be related to overwatering; even though you are being thoughtful and measured, i suspect your soil is staying too wet on the lower root levels. But, being pretty new myself, let's get some other opinions! @Emilya comes to mind as a great place to start, she helped me fix this exact scenario about 9 months ago.

Before I did or heard anything further though I'd let them dry till it was like the sahara desert up in there! I'd seriously let them go so dry the plants start to droop. I think you need to get the bottom of that pot dry!

 

[Dasnuggster]

Alrught. Ill let them dry until the leaves begin to drop a bit and in also going to switch to liquid cal/mag to be sure thats not it also. While im out getting the calmag ill get a spoil ph tester to get an accurate reading. Definitely want to figure this out i dont want it to affect my yields so close to harvest.