First Grow - Problems with top leaves

KirkB

Member
Hey guys, I am in the middle of my first grow. My gals are beginning their fourth week of veg. I am growing in soil and am having some problems with the top leaves. I have attached pictures. I am using the foxfarm nutirient line and feeding schedule. I am watering with ph 6.2 RO water every other day with nuts one feeding and simply calmeg the other. Giving them four cups each to achieve a small amount of run off. Also, have them one a 20/4 light schedule.

The top canopy of my leaves have started to lose alot of their green. Alot of the leaves are becoming a more neon green with some yellow. Alot of them are not growing full anymore with narrow leaves that are curled together like a canoe. Also, some of the leaves are simply browning out with a few turning purple. Also, all the leaves of the plants below this top canopy are still a rich dark and I assume healthy green. Pics are attached below for reference.

Pics 86-87: Neon green leaves with canoe shape and not fully growing/forming

Pic 88: Border is actually alot more purple then picture suggests.

Pic 89-92: Drying out and dieing of leaves.

IMG_0089.jpgIMG_0090.jpgIMG_0093.jpgIMG_0087.jpgIMG_0091.jpgIMG_0086.jpgIMG_0092.jpgIMG_0088.jpg

Thank you very much for any help. Look forward to learning from you guys and hopefully down the road be able to help other newbies like me.
 

KirkB

Member
My temps are staying with in a degree or two of 80. I am running alot of light fyi. This room has 6 1k bulbs running covering the entire grow. I had a heat problem a week ago where temps got to the 87 range but for the last week that has been fixed and the temp has been a very stable 80. I am running CO2 for 15 mins every two hours to get the PPM up to ~1500.

I took a few more pics. The canopy right below my new grow looks really healthy, but this newest layer of growth really is not happy.

Thank you for the quick replies so far.

IMG_0096.jpgIMG_0094.jpgIMG_0095.jpgIMG_0097.jpg
 

Snow Crash

Well-Known Member
I should have caught that earlier.

Why are so many soil growers using this pH level? Where are you getting it from? I'm dead serious. I dunno where.

Everything I've ever read and heard says the proper pH for soil is 6.5 to 7.0.
 

KirkB

Member
Thank you all for the responses. I am going to run my ro water at 6.7-6.8 and add some more fans across the top canopy. After hearing everyones responses I think it is heat stress. The more I look at the plants the ones closers to the AC seem to be doing a little better then the more damaged ones that seem to be further away from the AC. But just to be careful I am also going to go 1/2 to 3/4 strength nuits as well.
 

pointswest

Active Member
Your lights are too close and causing the heat stress. Leaves cup up to try and reduce the amount of light they are receiving.
 
Top