yellow spots fan leaves

Hello guys, I have been noticing an issue with my grow recently. I started growing this plant about a month and a half ago and it was growing beautifully, but then it started showing signs that something was not right with it. Some leaves have light yellow spots and the other leaves are turning...

I defoliated the sick looking leaves off the plant and noticed the spots are more pronounced in older leaves. They start as white spots along the edges and slowly turn yellow and it almost looks as if the spots eventually eat away at the leaf. Any ideas on what this might be, I thought a calcium...

Have two wifi x cherry alien about 45 days old from seed. Have had them on 24 hour a day light on schedule but am planning to reduce to 18 6 once I get a new timer for my light which I’m now thinking will be very soon. Plants have been very healthy and are now showing some minor stress signs...

Could someone please help me figure out why these 2 1/2 week olds are not doing as well as I’d like? On a 18/6 light schedule 400w metal halide bulb 22inches away from top of plants, I water every 2 days (about a 1/4-1/3 a solo cup of water) ph around 6ish, the soil I’m using is the soil in the...

What's up everyone,can someone please lead in the right direction, I'm getting terrible spots on some of plants... I'm in coco,and my ph meter for soil is reading 6.7 to 7.0 and I thought it might be a lack of something ,or maybe excess, or maybe light burn ,I'm running a mars hydro ts-2000,and...

Hi there I've started using Coco coir mostly and some soil. My new grow of ultra lemon haze started off so beautifully, but for some reason this problem has started where a few spots on the big fan leaves is causing them to shrivel and die. Initially I thought it was watering on the leaves but...