Hi, I have a single plant setup in a kind of screenless SCROG / LST as pictured. It's a Sensi 'Mexican Sativa'. It was under 4 x 2 ft (96W) fluoros for veg and the first two weeks of flowering, and is now under a 150W HPS, and is six weeks into flowering.
It's in a 22 L fabric pot with Biobizz light mix. I fed 2 mL/L fish mix and 2 mL/L Alg a mic from about a month into veg, and then the same but with 2 mL/L bloom (so all Biobizz nutes too) when I switched to the HPS.
At the moment temps are 17°C min, 27°C max, read on the tent floor.
I'm now getting yellowing, necrosis, and curled crispy leaf tips, worse on lower leaves but affecting all levels as pictured.
I'm ashamed to say I did under-water it a bit, allowing it to fully wilt a couple of times a few weeks ago, my only excuse being that I have a busy life!
Does this look like nutrient burn, or a deficiency, or something else? Whilst the occasions of underwatering weren't ideal I didn't think that could cause symptoms like this, especially several weeks layer, and they seem to be getting worse... Any help would be greatly appreciated.
It's in a 22 L fabric pot with Biobizz light mix. I fed 2 mL/L fish mix and 2 mL/L Alg a mic from about a month into veg, and then the same but with 2 mL/L bloom (so all Biobizz nutes too) when I switched to the HPS.
At the moment temps are 17°C min, 27°C max, read on the tent floor.
I'm now getting yellowing, necrosis, and curled crispy leaf tips, worse on lower leaves but affecting all levels as pictured.
I'm ashamed to say I did under-water it a bit, allowing it to fully wilt a couple of times a few weeks ago, my only excuse being that I have a busy life!
Does this look like nutrient burn, or a deficiency, or something else? Whilst the occasions of underwatering weren't ideal I didn't think that could cause symptoms like this, especially several weeks layer, and they seem to be getting worse... Any help would be greatly appreciated.