Hey gang,
First hydro grow. Top leaves are spotting. Can anyone identify the issue by sight? The ph for the entire grow has been between 5.4 and 6 (usually stays around 5.5), so no big swings. The humidity did jump way up for a bit due to rainy weather. There are 3 plants in hydro all showing signs on top leaves. I have 2 autos flowering in soil in the tent also and they do not have any of the issues. Thanks for looking and for your suggestions.
Hydro system. Jacks 3-2-1. Growers choice e720 w/UV (under 70% power) 18-24in. above canopy. There is a large tower fan, a fan above the light, and exhaust fan in the tent.
Could high humidity cause this issue? It has been way too high lately and the one area I know has been off.
What EC is your feed going in? Looks like calcium deficiency. Burnt serrations appear potassium deficiency. Suspect phosphorus deficiency as well. Are you using the mag sulfate?