Yellow drying leaves with brown spots - seems to be spreading?

First time grower - no clue what I’m doing.
I have two plants, auto blue dreams. One planted about a week before the other so it’s bigger and it’s been smooth sailing but a couple days ago I noticed a very dry yellow leaf with brown spots. I assumed it’s nitrogen deficiency based on what I’ve read which some say isn’t a huge problem when the plant is flowering? However, I noticed some other leaves have brown spots as well and it’s the newer ones on top.

About the plant - it’s day 42, using biobizz light mix soil, general hydrophonics trio, watering every 2 days with every other having nutes. Humidity in grow space has been pretty high - 55%. Using a LED light. Flowers are coming in. Just tested the runoff water and pH is just under 6.

Any ideas what it might be? Should I get rid of the bad leaf?
Thank you for any suggestions.

Looks to be lower growth combined with a blurple. My guess is some leaves lower down that aren't getting any light are just dying off. Pluck the ones that are 50% dead or more.

What's your EC that you feed? It's hard to tell with the blurple but it looks a bit wonky. If anything id drop your feed a bit

Hashishh said:

What's your EC that you feed? It's hard to tell with the blurple but it looks a bit wonky. If anything id drop your feed a bit

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What’s EC? Sorry total noob here.. and thank you for answering! I did wonder if I was feeding too often.. I just hope the buds won’t get affected

Nat.oaks said:

What’s EC? Sorry total noob here.. and thank you for answering! I did wonder if I was feeding too often.. I just hope the buds won’t get affected

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Take a look through this;

Hashishh said:

Take a look through this;

PPM: What It Is and How To Track It | Grow Weed Easy

PPM is a unit of measurement for tracking how much "stuff" is in your water. This is useful for growing cannabis as well as making sure your water is safe!

www.growweedeasy.com

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Ah I see, I actually got a TDS meter with my pH meter - didn’t know it would come in useful.
Cheers

Nat.oaks said:

Ah I see, I actually got a TDS meter with my pH meter - didn’t know it would come in useful.
Cheers

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Take advantage. Find that sweet spot and roll with it. I'm under a fairly strong light and feed at 800ec with soilless. Someone with actual soil might get away with just water or a water, water, light feed, water, etc.

Try just water for a bit and see if they turn around.

Hashishh said:

Take advantage. Find that sweet spot and roll with it. I'm under a fairly strong light and feed at 800ec with soilless. Someone with actual soil might get away with just water or a water, water, light feed, water, etc.

Try just water for a bit and see if they turn around.

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I’ll give that a go thank you

I got the same thing on week 4 from seed also using a burple. I watered and added .5 gram per gal of Epsom. Was feeding peters 20 20 20 every water at 1/3rd stength last two weeks. I need more light I guess.

rijkmus1 said:

I got the same thing on week 4 from seed also using a burple. I watered and added .5 gram per gal of Epsom. Was feeding peters 20 20 20 every water at 1/3rd stength last two weeks. I need more light I guess.

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Did you get to harvest ok?

No these are to be placed outdoors mid to end of May.

My screen is stuck on purple