dead plant

This plant is one of the two I had given to me they are big and we're ready to bud but just kept dying and wilting. I cut I down and got them in the right kind of pot to drain the water. I don't have any fancy growers tools. Can someone help me? It's such a shame to see it die it was so big

Hello all hope your well ! I appreciate the time your taking to look at this. So first I’m wondering how and why this plant may have died ? It was fine 6 days ago and I checked it today and looks Like this I am also find some PM spots on leaves of my other plants that are doing well. They are...