Your female will technically reach sexual maturity at 6 months, but shouldn't be bred until AT LEAST 8 months. I would really wait until she is 10-12 months old. It will be a lot safer for her.
I am not sure of an exact healthy weight. I have actually never weighed my chameleons. However, as long as you keep her on the proper feeding schedule with vitamins and calcium then she will be an apropriate weight for breeding by the time she is a year old.
The new cage that you got will be perfect to house the adult panther in.
I mostly use pothos hung on one of the sides of my reptariums. They are impossible to kill, grow like weeds, and have sturdy vines. Of course you have to use some fake branches among the pothos to give them extra support, but my chameleons usually crawl through the pothos without any trouble.
Hibiscus are also good live plants to use for chameleons. They flower and are pretty hardy. Occasionally you have to fetilize them *very lightly* and give them some sun.
As for the substrates, in my opinion, by far the best is just plain 'ol newspaper. It makes cleaning very easy. Just pull out the paper then replace. If you have a mesh bottom that drains into a resevoir, that is fine too, but may make cleaning the poop tedious. You may even be able to combine the two by putting a thin layer of newspaper on the mesh bottom, just enough to hold the feces, then the water can drain through so it won't flood the tank or become stagnant. Just remember, that the cage should be spot cleaned every day and any poop should be removed.
Just don't use any sort of loose substrate like dirt, bark chips, moss, etc. Feeder insects can hide in the loose suff, or even worse, the chameleon will end up ingesting it when it shoots it's very sticky tounge at an insect. That can cause not only damage and blocking, but sometimes even death.
As for breeding, I do not change the temperature at all there are a lot of details when it comes to breeding though. The female needs to be on a resticted diet with a strict feeding schedule prior to, and after mating. What I suggest is that you e-mail a freind of mine who is a genius when it comes to panthers. He can give you a proper feeding schedule and a care sheet for you female when she becomes gravid (pregnant).
You can contact him at
bluebeastreptile@aol.com and his name is Tyler Stewart. Let him know I sent you, And good luck to you!