Can anyone tell me what's wrong?

[hoots123]

I'm about 45-50 days into flowering.
I'm in coco
Using RO water.
Been feeding extra calmag
Humidity is too high In the tent but not sure that's the problem also have a few gnats.

Attached is a few photos shouldnt be rusty yellowing this quick...

 

[Greengrower87]

I'm about 45-50 days into flowering.
I'm in coco
Using RO water.
Been feeding extra calmag
Humidity is too high In the tent but not sure that's the problem also have a few gnats.
Check iron I was reading about it on here I attached a screen shot of what I was reading
Attached is a few photos shouldnt be rusty yellowing this quick...

 

[Merlin1147]

Without a lot of info I’m guessing Zn, Mn, Fe deficiency. What is your ph? Has it been fluctuating or running high? Have you been pushing P? That will lock out many micros. The rest of the plant looks really dark, but that could be the lighting in the pic.

 

[Aussieaceae]

Got progressively worse adding extra calmag, not better?

Check your waste next feeding. Both ph and ec / ppm.

If the ph isn't far too low, or ec / ppms far too high in your waste. Or both, then i'd say it's most likely the calmag causing a lockout.

Calmag definitely isn't the magic tonic it's made out to be, it's still a supplement and should be treated as so.

Get the waste readings, post back here.

Good luck.

 

[3rd Monkey]

That is 100% copper def and you need to fix it fast. You're using RO, so make sure your nutes have copper, but it's most likely ph. It's going to severely stunt your buds if you don't get on it quick.

When you get it fixed, the leaves won't recover, but it'll stop spreading. Good luck.

Also, stop giving extra calmag. Your copper is competing with calcium and losing.

 

[yosim]

overfed

 

[hoots123]

just been flushing for the last few days but its only gotten worse.. the ph on runoff is a bit high around 6.8 the PPM is around 1200 which is high too.
have alot of buds coming in they seem alright still. but the plant is just converting to rusty/yellow by the day...

would you just grow this out to the end? not sure what to do now.

The picture doesnt do justice its alot worse

 

[SPLFreak808]

just been flushing for the last few days but its only gotten worse.. the ph on runoff is a bit high around 6.8 the PPM is around 1200 which is high too.
have alot of buds coming in they seem alright still. but the plant is just converting to rusty/yellow by the day...

would you just grow this out to the end? not sure what to do now.

The picture doesnt do justice its alot worse

Im thinking 3rd monkey might be on to something here bro, if its not lockout/imbalance & you dont have trace minerals covered then you are short on copper.

 

[OldMedUser]

If I were to point my finger at one particular missing nutrient it would be sulfur deficiency if anything. Not even closely resembling low Cu.

Sulfur is the 'secret' ingredient in bloom boosters like Big Bud as the plants use a lot of it for resin production and many other functions.





If pH is too high it could be causing a lockout of micros too.

 

[3rd Monkey]

If I were to point my finger at one particular missing nutrient it would be sulfur deficiency if anything. Not even closely resembling low Cu.

Sulfur is the 'secret' ingredient in bloom boosters like Big Bud as the plants use a lot of it for resin production and many other functions.

View attachment 4333609

View attachment 4333612

If pH is too high it could be causing a lockout of micros too.

View attachment 4333615

Except that sulfur starts at the base, copper at the tips.

I've done it... it's copper.

Edit: Also those charts suck in my opinion.

 

[Owsley1975]

Trace mineral lockout from too high ph. Probably from the coco. 6.8 is 10x the optimum of 5.8. Almost all of these trace mineral deficiencies can be traced back to ph lockout. Iron and Copper deficiencies on their own are very rare since all nutes have more than enough trace minerals.

 

[3rd Monkey]

Trace mineral lockout from too high ph. Probably from the coco. 6.8 is 10x the optimum of 5.8. Almost all of these trace mineral deficiencies can be traced back to ph lockout. Iron and Copper deficiencies on their own are very rare since all nutes have more than enough trace minerals.

Copper, calcium, magnesium and iron all have a 2+ valence. Growing in coco, where K (1+) notoriously clings well, feeding extra calcium and magnesium... copper and iron are the oddballs out.