Hello, welcome to the forum!
Shellcior wrote:I plan of making shelves to place these plants just above the feeding areas but off of the ground.
Good idea! That way the plants do not become a snack.
Shellcior wrote:There are flies that congregate there and I tried fly strips last year and that did not help much. I want a natural way to keep the insects at a minimum as I don't use insecticides near my tortoises.
Carnivorous plants are a lot of fun to grow, but they are not
a significant solution to insect infestations. I would recommend a sarracenia (north american pitcher plant), but even they won't solve your problem very efficiently.
I would recommend one of the fly bag traps. Hang it a little ways away from your tortoises (so that the flies will leave the tortoise area), and the flies will go crazy; killing themselves in the process. I use bag traps for keeping livestock fly-free, as they make a very noticeable dent in the population.
"Complaining about a problem without posing a solution is called whining." - Theodore Roosevelt