Hypothetical question here.Lets say a friend brought a few mothers that were in the trunk of the car,and it was cold out.Could of been 2 day trip.Now the plants are showing yellowing and black necrotic spots on the leaves,mostly on the sucker leaves.Is it just shock from the cold locking out the nute's?Are they salvagable?have a idea of how to revive them ,but would love some input!