Hello All,
New to the forum and growing too. I'm hoping to get some help with identifying my problem and any help would be greatly appreciated. I have researched and have the Cannabis Encyclopedia by Jorge Cervantes and still can't figure out my problem.
First, I started two seeds four weeks ago. Only one sprouted so I started another a week later. I am using Fox Farms Ocean Forest with a 75/25 blend with additional perlite. I have a PH pen, a TDS meter, and am using RO water with a starting PPM of 0-1. I am also using 300W of Vero 29 gen7 COBs. Temps are running 78-82F with a humidity around 40%. PH of water in is around 6.5 - 6.8. Runoff is around 6.5.
Everything was going good until the second to third week from sprout and I started to get brown/red spots on the lower leaves. After researching I suspected a cal/mag issue to be the culprit because of the RO water. I didn't think I would have to add the cal mag until the soil was exhausted. So, I started adding 3.5 ml/gal of calimagic to bring the PPM up around 270. Then I starting reading that FFOF was a hot soil and tested the runoff to be around 1300 PPM. WOW! I flushed the oldest plant as that is the only one that was having this issue. The ending PPM was around 400. Now I'm at four weeks and the problem is slowly progressing to the next set of leaves. The tips started to look like nute burn and now they are crispy.
The first three pictures are the oldest plant. Now the youngest plant is starting to show the same signs (pictures 4 & 5). Is this a calmag issue? Nute burn? Or could it be fusarium wilt?
Any help would be greatly appreciated.
Thank you!
New to the forum and growing too. I'm hoping to get some help with identifying my problem and any help would be greatly appreciated. I have researched and have the Cannabis Encyclopedia by Jorge Cervantes and still can't figure out my problem.
First, I started two seeds four weeks ago. Only one sprouted so I started another a week later. I am using Fox Farms Ocean Forest with a 75/25 blend with additional perlite. I have a PH pen, a TDS meter, and am using RO water with a starting PPM of 0-1. I am also using 300W of Vero 29 gen7 COBs. Temps are running 78-82F with a humidity around 40%. PH of water in is around 6.5 - 6.8. Runoff is around 6.5.
Everything was going good until the second to third week from sprout and I started to get brown/red spots on the lower leaves. After researching I suspected a cal/mag issue to be the culprit because of the RO water. I didn't think I would have to add the cal mag until the soil was exhausted. So, I started adding 3.5 ml/gal of calimagic to bring the PPM up around 270. Then I starting reading that FFOF was a hot soil and tested the runoff to be around 1300 PPM. WOW! I flushed the oldest plant as that is the only one that was having this issue. The ending PPM was around 400. Now I'm at four weeks and the problem is slowly progressing to the next set of leaves. The tips started to look like nute burn and now they are crispy.
The first three pictures are the oldest plant. Now the youngest plant is starting to show the same signs (pictures 4 & 5). Is this a calmag issue? Nute burn? Or could it be fusarium wilt?
Any help would be greatly appreciated.
Thank you!
