Severe discolouration of lower leaves and cracking

[Canublay]

Please can somebody help me diagnose this j

 

[Red eyed c]

Hey mate can you give us some more details please.do you know your soil ph? What are you feeding and what's the ph of your feeds? :smokebuds:

 

[low_and_slow]

Can you provide some more information? Initially I'd guess a combo of overwatering and pH problems...this is from the top of the infirmary forum, basically we need some additional info to help diagnose:

1) Any and all soil / reservoir / lighting / ph information - especially changes in the last 24 - 72 hours if using liquid nutes... and in the last 0-14 days if using organics (guanos etc)

2) pictures (preferably under normal camera lights for proper color/contrast)

3) Specify whether you are in soil or Hydro

4) Please use the "search" in the upper right hand corner - sometimes the answer is already right there.

 

[Canublay]

I am using john innes no.1, two 125watt cfls, watering with ph 6.5. Bio grow and magnesium flakes so far. (Very little amount). I do not think I have over watered I gave her two litres on day 28 it is now day 34 and she has had no more water. The rest of her all seems very healthy? Its just her bottom leaves :s

 

[Muddy]

Watering at 6.5 is okay, but what is the pH of your run off? I suspect it's either too high or low, causing a nutrient lock out situation. If that's the case, it usually shows on the bottom leaves first, then works up.

 

[Canublay]

Okay i just checked run off and it was at 7, so i watered with 3 gallons of ph 6 water. Then an additional 2 litres with a tsp of magnesium flakes and 2mlI of bio grow as i am worried she isnt getting enough nutes. Im quite confused really. I have no idea whats going on

 

[low_and_slow]

Adding nutes or supplements will probably not do much to help. Take a look at some of the threads regarding pH problems in the new grower's forum. If the soil pH is off, all the nutes in the world won't cure the problem.

https://www.autoflower.org/f42/ph-potential-hydrogen-manual-polled-12594.html
https://www.autoflower.org/f42/fds-starter-guide-nutrients-autos-noobs-please-read-11549.html
https://www.autoflower.org/f42/ph-nutrients-uptake-charts-7754.html
https://www.autoflower.org/f42/guides-plant-problems-1944.html
https://www.autoflower.org/f42/beginners-guide-ph-control-14611.html

^good place to start reading^