Plants turning bad fast and I'm not sure what it is.... help

Day 23 of flower ....


The yellowing is getting worse fast, like this ^ leaf was only yellow this morning and now its curling and browning. Any help would be much appericated!!

Soil
Fabric pots
and these are all the nutes I use

What is your temps and ppm ? Also oh and humidity in the room?

What ration are u using..u have to give a little more detail about set up...from looks it seems room temp swings or nute difficiency

Room temps swings
79f-89f
38%-40%RH
As for ratios I do what’s on the back of the bottles
1tsp/gal. FloraGro
2tsp/gal. Mirco (first)
3tsp/gal. Bloom
And finally 2ml of pHdown (last)
Water is tap = 135ppm (before nuts)

I rarely give CalMag. I think I gave it a shot 1tsp
Last weeks feeding for the first time

In the beginning I used my ppm meter but I haven’t in a month bc things seem to going fine

This problem is about 4 days old. the dark purplish leave only just started 2 days ago

Sorry to keep posting but I didn't realize deficiencies came on so fast! Unless its not a deficiency...

when i look very close I see small clusters of black spots, very tiny. Pin head needle in size.

my phone camera sucks but thats the best i can show. These clusters are on a 3 different leaves and very small clusters.

I've read it could be a fungal problem or maybe even bugs! But i havent seen one bug flying around and no webs or holes in the leaves... So i'm not sure. I do notice that the closet (and room) smells a but musty and planty if that makes sense....
Thanks again for any help!

You need to cut your nutes in half or just use the Lucas formula. I only use 4 ml micro and 8 ml bloom per gallon and they stay nice and green. I'm only half of Lucas formula and you are over double Lucas formula.

The first pic the on the left is healthy, no yellowing or purple and they're both on the same feeding regiment and the same
bagseed. I figured if I was feeding them wrong they'd both be showing signs

Whats your pH running?

This feed works great for me, you can skip the Armor Si. If you do use it, add first. Add order, Si, Calmag, Micro, Grow, Bloom. pH to 6.5 - 6.7

Renfro said:

Whats your pH running?

Click to expand...

i dont have ph meter (color changing drops and 5ml tubes), but the color my tap water shows is light green which I assume is 6.8-7.0

I add 2ml pH down a gallon which usually brings it to a yellow which is 6.0 - 6.5? Im hoping anyway.

things have been going pretty good so far up til this point....

(edited) After reading your 2nd post do you think its signs of toxicity rather than deficiency?
Also forgot to mention before that the plant thats healthy looks more like a sativa with its leaves
and the indica looking one is suffering, but both are from the same grower (they were given to me from outdoor when they were babies)

Looks like a phosphorous issue to me. Do a google search on "phosphorous deficiency cannabis" and look at the pics.

The P def could be caused by pH or just a weak feed. I did the numbers on what you are running and the PPM on an EC pen is probably less than 600 not including water overhead. I would get it up to 1000.

https://www.growweedeasy.com/cannabis-plant-problems/phosphorus-deficiency

Renfro said:

The P def could be caused by pH or just a weak feed. I did the numbers on what you are running and the PPM on an EC pen is probably less than 600 not including water overhead. I would get it up to 1000.

https://www.growweedeasy.com/cannabis-plant-problems/phosphorus-deficiency

Click to expand...

Thank you Renfro. I really appreciate the help! you, sourpower and natureboy thank you! I have one more concern thou and its this...



the black spots are on more leaves than i thought and after looking it up it seems like bugs! The spots are in clusters on some fan leaves
The leaves don't have this black stuff on the underside of the leaf, only the top.
The girls are sleeping now but Ill check if i can wipe them off with water or not in the morning.

well do the "bugs move"?

get a better closeup where we can see them in more detail. I don't see any signs of mites eating the leaves. do you see that anywhere? may be predator mites? could be dirt.

not under the leaves, makes me think dirt.

So the black spots come off if I rub hard enough they don’t move but they seem to be anywhere there’s some leaf damage and apparently it’s on all my girls
I thought maybe it was like poop from bugs I’m not seeing

Ur room is getting to hot don't let it get past 82 with hps if ur using led not past 85..room humidity is to low at least 50 minimum.better to be at 60..as people have said ur feed is to low as well...if u don't see bugs likely it's a combination of room environment and nute feed from what u described..