Plants yellowing and brown spots...

[Bzy]

So I started out 10 plants from seed:

Jelly Rancher
ALL GAS OG
Blueberry

They all were going great, good colors etc up until about the third or fourth week of veg, some of the leaves started turning yellow and getting brown spots, it eventually took a few leaves and started to get worse. Now it's about 4-8 weeks in and it doesnt seem to be stopping.

PROMIX BX
Tap Water PPM: 120
Tap Water PH: 6.5
Water PPM with nutrients: 800-900PPM
Water PH with nutrients: 6.1-6.3
Water PPM Runoff (RO) 1200
Water PH Runoff 6.1-6.2
Slurry Test: 500PPM
Slurry Test: 6.5PH
Temp: 75-80F
Hum: 50-65%

So everythings all over the place, trying to gather and piece information from sites/forums to try to correct this issue. It's only really one plant thats bad but the others are starting to show it now too. I checked for bugs, no sign of any bugs... So I'm unsure what to do next...

 

[GNick55]

looks like it could be your watering practices along with the light being too close?
how much/often do you water?
kind of light/distance?

 

[Bzy]

looks like it could be your watering practices along with the light being too close?
how much/often do you water?
kind of light/distance?

Running a 480W KingBrite QB @ 60% about 24" from canopy. I water when the soils dry about once every 3-4 days.

 

[GNick55]

pro mix bx the silver bag?
if so no need to be ph ing.. it has ph buffer.
anyhoo, what size bags and how much water do you give?

 

[Bzy]

pro mix bx the silver bag?
if so no need to be ph ing.. it has ph buffer.
anyhoo, what size bags and how much water do you give?

Its like the white and black bag. 2 gallon pots and about half a gallon each till runoff.

 

[GNick55]

Its like the white and black bag. 2 gallon pots and about half a gallon each till runoff.

ok sounds about the right amount.
what nutrients are you feeding and how much per gallon of water?

 

[seed2green]

Not sure if this is the culprit or not, but 24" may be too close for your lights during veg. I usually place my lights around 4 feet away during veg and allow my plants room to grow upward.

 

[Bzy]

ok sounds about the right amount.
what nutrients are you feeding and how much per gallon of water?

Frontrow AG A+B 2-2.5 grams per gallon.

 

[Bzy]

Also I planted 10 more Super Skunk seeds and they popped and everything, saw rooting coming from the rockwool so I transplanted to solo cup now a few of them look like this... They are droopy and turning yellow...? The soil I put them in is Promix BX fed with PH 6.2 water.

 

[GNick55]

i think your good with the nutes, though i did a quick research so i could be wrong.
my only diagnosis is it’s your watering practices, i see a meter in the soil is that how you gauge to water or not?
are you sure your letting it completely dry out? as the very middle center would be the last area to dry and it’s the area with the most condensed root mass.
i welcome any other help here! if i’m wrong..

so just hold off on doing anything!
until other replies.

 

[Madbud]

I’d get some air under the bags, grates or wood strips to get the roots dry.

 

[3 balls]

I would lean watering issues like Gnick says, familiarizing yourself with the weight of the pots could help. Madbuds got good stuff too, I love my pot elevators. As far as Frontrow charts go, you seem to be on a hard water/amended soil dose but personally I think of promix as closer to inert like coco which could be leaving you a little light.

 

[Bzy]

I lift pots to test water they seem dry i water to runoff.

 

[GNick55]

I lift pots to test water they seem dry i water to runoff.

ok those nutrients, is there a feeding chart thing on the back?
your giving 2/2.5 gm?- is it powder or liquid?

 

[Bzy]

ok those nutrients, is there a feeding chart thing on the back?
your giving 2/2.5 gm?- is it powder or liquid?

It's powder that I mix with water. and yes 2-2.5g per gallon of Part A and Part B frontrow. I'll check the bag.

 

[Bubbah]

Classic signs of needing 2 things, PH all water and mute solutions...even cal mag will alter PH

Also, add Call Mag.

Bubbah

 

[Bzy]

Classic signs of needing 2 things, PH all water and mute solutions...even cal mag will alter PH

Also, add Call Mag.

Bubbah

I ph my water to 6.1-6.3 with a Milwaukee MW102? I also do use calmag sometimes, I have nutrients that gave calcium , magnesium I also run 120PPM tapwater so it already has some. So I dont use calmag often if at all. I always PH before and after nutrients to around 800ppm/1.6EC @ 6.1-6.3ph. I was told not to use calmag with my nutrients as it already has it.

 

[TheBadChoice]

I ph my water to 6.1-6.3 with a Milwaukee MW102? I also do use calmag sometimes, I have nutrients that gave calcium , magnesium I also run 120PPM tapwater so it already has some. So I dont use calmag often if at all. I always PH before and after nutrients to around 800ppm/1.6EC @ 6.1-6.3ph. I was told not to use calmag with my nutrients as it already has it.

120ppm tap but that’s not all just cal and mag their gonna be other sources in that so your gonna need cal mag every nute mixing at about 1 to 1.2ml per gallon

 

[3 balls]

It does contain the micros but like I said your feeding at amended soil levels. I feel like you would be better feeding hard coco dose.

_Direct to Reservoir - GR/GAL (US) - Google Drive

drive.google.com

 

[TheBadChoice]

Also your in early stages of veg reduce your over all ppms you can see the burn from the nute