I've been growing this spumoni from the plug seedbank. In coco, around 27/28C temp. Humidity little low around 35-40% Feeding using canna grow guide high strength feeding option. Using coco a and b, rhizotonic and shogun nutrients calmag. Hard water area. I have these brown spots just starting to show past day or 2 with the tips of the leaves curling. On a few leaves but only one plant, I've been watering every 2 days but havent really been watering to run off as I felt like id be drowning the roots. Can anyone help as it's not very bad at the minute and I don't want it to get any worse? Thanks in advance
PH is off or could be a Cal/mag deficiency. Check the charts for reference. Google Marijuana Deficiencies.
Thanks. I've been watering at 6.2 but like I said not been getting run off so could I possibly have some salt buildup? Only my 3rd grow and trying to learn as much as I can