Help!! :)

Hey ive already read through alot of the posts about plant issues but cant seem to come to a conclusion, any help would be much appreciated.

Symptoms : yellowing started on older leaves, at bottom and has progressed to mid way up plant over last 2 weeks, a few leaves have gone totally yellow and are showing necrosis. Yellowing starts blotchy forming in circles before enveloping full leaf. The yellowing has continued since adding CM+ to the feed last week thinking it might be nitrogen def.

Medium : sunblaster soil, no added nutes to soil

Temps : steady 26 degrees Celsius with lights on, 24 degrees with lights off

Humidity : 52%-68%

Container : In a 3 gal pot, replanting april 10 (tomorrow) to a 5gal pot

Water cycle : feed every week or when soil become dry, watering on the 3rd days, so it would be monday feed, friday water and feed again on monday, altering it as needed to ensure it doesnt become totally dry.

Ferts : sensi grow a&b 3-0-0 & 1-2-6 @ 95% strength, b-52 2-1-4 @ 90% strength, pro-silicate 0-0-4 @ 75% strength. (Added CM+ 3-0-0 to last feed to see if it might correct nitrogen def. But the problem presists and has become worse.

Lighting : 600w LED true watage @ 236ish 2 feet above canopy, and 1000w LED true wattage 178ish 3.5 feet from canopy.

Transplanted 30 days ago.

Any help is much appreciated check out my pics. And ill try and answer any questions if ive forgotten something as quick as possible.

I would say for sure, you're not short on N. Your plant is plenty green as is the newer growth. Not to mention the fading of the leaves would be more uniform in my mind.

Can you elaborate on your feed pH, and what makes up your soil? When you feed / water, do you get any sort of run off? I have seen in times past, if at a particular moment in time, I wasn't giving a plant what it wanted, that the leaves and plant structure at that time will reflect what they were being shorted on, and when I corrected things, those leaves didn't fix themselves, but the new growth was good. Sort of like rings in a tree, will show good times and bad....perhaps when those leaves were growing they were shorted with something that isn't missing now?

How are you addressing Mg in your feed? Are you feeding micros? Have you considered dropping all the extras and just running with the A & B until you get things sorted? Perhaps you're over doing her a bit and it's locking out something? Just thoughts to consider.

Looks like nitrogen deficiency to me. The yellow is spot on for it. Straight yellow starting from bottom up. Also your purpling stem is another probable sign of deficiency. Usually potassium. The growth tips look funky and you got the droop on upper leaves suggesting built up water in bottom of pot or needs a transplant. Looks like it needs a transplant to stretch out it’s legs.

CannaCountry said:

I would say for sure, you're not short on N. Your plant is plenty green as is the newer growth. Not to mention the fading of the leaves would be more uniform in my mind.

Can you elaborate on your feed pH, and what makes up your soil? When you feed / water, do you get any sort of run off? I have seen in times past, if at a particular moment in time, I wasn't giving a plant what it wanted, that the leaves and plant structure at that time will reflect what they were being shorted on, and when I corrected things, those leaves didn't fix themselves, but the new growth was good. Sort of like rings in a tree, will show good times and bad....perhaps when those leaves were growing they were shorted with something that isn't missing now?

How are you addressing Mg in your feed? Are you feeding micros? Have you considered dropping all the extras and just running with the A & B until you get things sorted? Perhaps you're over doing her a bit and it's locking out something? Just thoughts to consider.

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Just transplanted into a 5gal pot, and gave it a decent flush to try and clear out any built up salts, and will return to feeding in a few days again. Id rather let it starve then drown it in nutes.

Checked the ph of my water and its low for sure 5.2, my feed ph is 5.7 (a&b has a ph buffer) and the run off today from the flush was 5.1, going to go get some ph up for my water cycle.

The medium is a soil perlite and pete moss blend not sure of the exact ratios but its great stuff.

I just find it strange i have 2 plants in the same tent under the same conditions, same genetics, although the one with yellowing fell over about a month ago and lost a few branches, which slowed growth so maybe were its no longer as big as the other i should have stepped down the nutes for it. Bellow is the good one with almost 0 yellowing on it beside a few leavss on the 1st-3rd node where light doesnt reach anymore.

danjac82 said:

Looks like nitrogen deficiency to me. The yellow is spot on for it. Straight yellow starting from bottom up. Also your purpling stem is another probable sign of deficiency. Usually potassium. The growth tips look funky and you got the droop on upper leaves suggesting built up water in bottom of pot or needs a transplant. Looks like it needs a transplant to stretch out it’s legs.

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The droppy leaves i believe were from drying out, i recently increased airflow into the tent and have been trying to adjust watering times, but had lost track of what day it was and forgot to water. And it was in need of a transplant, was in the 3gal for 30 days, up from a 1.5gal, just put it in a 5gal today and going to flip it to flower in a week.

Hoping to correct the issue by then

Meatball3 said:

The droppy leaves i believe were from drying out, i recently increased airflow into the tent and have been trying to adjust watering times, but had lost track of what day it was and forgot to water. And it was in need of a transplant, was in the 3gal for 30 days, up from a 1.5gal, just put it in a 5gal today and going to flip it to flower in a week.

Hoping to correct the issue by then

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The plant looks good and I bet it picks up once you feed it. Could have been ph issue causing uptake problems as you mentioned. Plants are definitely hungry. From that angle I can see it definitely wants phosphorous. Purpling stem and petioles going toward growth tip. Nitrogen deficiency going on as well. Dropping at top could be cause it needed repot.

You don’t add lime to your mix?

danjac82 said:

You don’t add lime to your mix?

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I havnt been, could u suggest a brand? I think what i was doing for my last few grows (that i just realised) was adding pro-silicate to the waterings, and not using it with the feed, to raise the ph and add a little potassium.

Over watered if you ask me, causing your issue. lots of droopy leaves. chill with the watering

Meatball3 said:

Just transplanted into a 5gal pot, and gave it a decent flush to try and clear out any built up salts, and will return to feeding in a few days again. Id rather let it starve then drown it in nutes.

Checked the ph of my water and its low for sure 5.2, my feed ph is 5.7 (a&b has a ph buffer) and the run off today from the flush was 5.1, going to go get some ph up for my water cycle.

The medium is a soil perlite and pete moss blend not sure of the exact ratios but its great stuff.

I just find it strange i have 2 plants in the same tent under the same conditions, same genetics, although the one with yellowing fell over about a month ago and lost a few branches, which slowed growth so maybe were its no longer as big as the other i should have stepped down the nutes for it. Bellow is the good one with almost 0 yellowing on it beside a few leavss on the 1st-3rd node where light doesnt reach anymore.View attachment 4315591

Click to expand...

Reel in your pH and I bet you find a completely different plant than what you're dealing with now...5.7 is too low for your style of grow. Good luck friend.