Trying to learn Identifying deficiencies

[Quadscrusher]

Hello I have 2 plants growing in FFOF showing 2 different symptoms I was wondering if anyone can tell me what they think is wrong

Using philzon 2000w cob led

speckles on one leaf from cookies autoflower thats in week 4 of flower

And 2 blotches on green gelato leaf week 6 veg

Both 24 hr light cycle
Watered with tap water ( usually sitting at 6.8 -7.0 ph) in well ventilated room with oscillating fan sitting around 50RH and 70-80 degrees


Please see pictures
And appreciate all the help i can get trying to learn more about growing conditions...

 

[NinoGrows420]

I think with that soil your not supposed to feed for a couple months. Are you giving her extra nutes? Do you let the soil dry out before watering again?

 

[NinoGrows420]

I saved this hopefully it helps.

 

[oldskol4evr]

check for bugs,also way to much n in my opinion,the one big brown spots looks like a splash with light on

 

[cemchris]

Dutch Masters has a real good writeup and reference to it I use from time to time. Top of the chart and the understanding of mobile and immobile helps a ton. Also if using soil understanding how immobile P actually is in composted material helps a bunch. Just be warned it's a rabbit hole if you want to go down it. Most of the really good info you have to dig for and search on google scholar. It will be hidden away in the PDF's of commercial AG injection systems for example.

Deficiency & Toxicity

Knowing how to spot particular symptoms of nutrient deficiency or excess can help save an entire crop from impending failure. Growers beware, nutrient problems are not always as they seem! There are many potential causes for both deficiencies and toxicities. Just because it looks like a...

dutchmasternutrients.com

 

[nicolajanjak]

Hello I have 2 plants growing in FFOF showing 2 different symptoms I was wondering if anyone can tell me what they think is wrong

Using philzon 2000w cob led

speckles on one leaf from cookies autoflower thats in week 4 of flower

And 2 blotches on green gelato leaf week 6 veg

Both 24 hr light cycle
Watered with tap water ( usually sitting at 6.8 -7.0 ph) in well ventilated room with oscillating fan sitting around 50RH and 70-80 degrees


Please see pictures
And appreciate all the help i can get trying to learn more about growing conditions...

first your leaves look very dark green .. much nitrogen .. too much i think

these spots on the leaves remind me calcium deficiency ..

my guess is that your soil is too hot ( too much fetilizers) .. that would explain the N overdose and the blocking of calcium maybe caused by another element that is also too abondant .. p or k probably ..

i guess your tap must have enough cal/mag in it (calcar) so i dont think its a problem of tap