OG Kush - Season 3

Ok first I would say your mother needs replacing she seems to have lost her vigour. Cannabis is an annual and is programmed to last a season pushes it beyond a year by cloning over and over and over and over just makes her very tired. Although looking closer at it it could be a moisture problem causing a mould to eat the tip out. I wouldn't be too worried as the main leaves are alive and rather a nice colour so they are not dry or they would be drooping ..instead they seem to be showing positive tropism which is a sign there is life beneath the soil. so have patience it may take a couple weeks but it will bounce back eventually. Best spectrum for roots is blue as said below...best spectrum for new clones is purple...a nice mix of red and blue is the best overall light for new clones. Or your could plant a new mum and start again which is also fun. I hope that helps and wish you the stickiest of buds!

Prune the remaining leaves back about 50%-75% each and put a dome over the whole plant to help hold in moisture. She's drying out. Also, use a spray bottle set on mist to give it water. Spray the clipped leaves, the stem, and the soil. But, don't saturate the soil completely. If you are able to, start giving it more blue spectrum. Blue spectrums help grow roots and solidify great root balls. Clones that are in the process of rooting can be finicky and fragile. I hope this helps.

Never take grow advice from stoners.