Phosphorus, overwatering, or moisture stress?

[xIPhobiaIx]

Bottom leaves curling up and turning patchy brown/blackish before wilting on falling off.

Any help would be appreciated!

 

[hotrodharley]

Phosphorus deficiency.

 

[Budzbuddha]

Growth is kinda off. Are these clones ?

They seem genetically weak. No real lateral growth.
You have all the lighting they need but for some reason they seem weak. It looks like you have a couple of them showing issue. With the number of plants going you could just cull them.

 

[hotrodharley]

Fill those containers to the top. Keep them topped off as the medium breaks down.

 

[Tangerine_]

Are those clones?
Poor lighting?
Root stress?

 

[xIPhobiaIx]

Growth is kinda off. Are these clones ?

They seem genetically weak. No real lateral growth.
You have all the lighting they need but for some reason they seem weak. It looks like you have a couple of them showing issue. With the number of plants going you could just cull them.

They were just brought in and not yet topped

 

[ComfortCreator]

Do you have fans blowing on them?

 

[xIPhobiaIx]

Do you have fans blowing on them?

Why do you ask? What is interesting about your question is no I do not. I am adding a bottom row of fans tomorrow to get some air movement.

 

[Hollatchaboy]

Need more info. Medium, nutes, light, stats?

 

[Tangerine_]

They were just brought in and not yet topped

They probably just need a chance to acclimate to their new environment.

 

[Nutty sKunK]

P def is easy to identify. It goes grey/grown and no yellowing on the older leaves progressing to new fan leaves. Which is what you have.

Question is what medium, feed are u giving them?!

 

[TaoRich]

How is the drainage of your soil?
And how compacted is it?

Root stress?

Could be a lack of oxygen to the roots, and that can present as a nutrient deficiency. Not because your medium doesn't have what's needed, but unhappy inefficient roots can't supply it when and where needed.

 

[calvin.m16]

Looks like more than 1 issue here dude. Did you spray the plants with something??

Room Temperature?
Room Humidity?
Airflow?
How often are you watering?