Major problem affecting all my plants!!!

sup guys, the bottom of my plants are curling, turning brown and very crispy. It is not affecting nre growth but as it ages affects the older growth. the temp is at 90. Is there any other reason for this than temp?

over nuting.
had the exact same problem this last crop.
if your doin ebb & flow.
clean out your rez weekly.
all the nutes not used just build up and progressively get more concentrated.

more info needed

smokeybandit22 said:

more info needed

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growing in pro-mix soil, no nutes given. Watered every 2-4 days. got 138watts of cfl on them and they are now in flower since 3 days ago

At the end of veg into the start of flower they will start to loose older, larger leaves. The lower leaves are the first to go. Use a flower nute with nitro in it and the older leaves will stay green longer.

couldnt agree more with Bubba, just keep the nitrogen light and you would want to stop maybe halfway through and than they and other fans will continue to yellow till harvest which is what you want. the plant needs those big fans in early to mid flower more than ever.
to rule out any possible defeciencies can you post some pics or describe in detail the nature of the leaf changing to what you describe better?

nah, the plants are very small about on their third node i had to go into flower now due to a small space. This problem occured before i went into flower. Click this link for pics before i went into flower as you can see the problem started but now it is throu-out the whole bottom leafs and they are very crispy i pinched one and it crumbled in my hand.

https://www.rollitup.org/marijuana-plant-problems/123425-ice-grow-fuckn-up-help.html

thanks for help guys

help plz!!

From the pics you link to, it looks like a pH problem. What is the pH of your water?

rolla8 said:

From the pics you link to, it looks like a pH problem. What is the pH of your water?

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no idea i use a naya bottle

Is that spring water? If it is, switch to filtered water and get yourself a pH test kit. That's the only way you're going to be able to correct a pH problem. Spring water frequently has a high pH and needs to be buffered before it is suitable to use for growing. Even store-bought filtered water often has a slightly high pH, because of the minerals they add for flavor. That's why you need a pH test kit. They cost less than $10 and you can get one at any pharmacy or garden center.