Wayne Clark has huge calves. He jumps 50 inches.
There's also this bald guy in the gym with huge calves, he can jump 10 inches.
I think great calf strength is key when you couple them with great hip strength. At the same time, if you apply great upperleg strength (quad/glute) into the ground it has to travel through the calves to get there. They can't help but adapt (grow).
So increasing your squat and applying that new strength into the field (plyos, dunking, playing etc) should have a carryover into calf hypertrophy as well. It's going to take time though.
my calfs were up an inch during that month of very high rep tuck jumps, they were around 14" last I recall, not sure what they are now.
In my experience calf size seems largely due to genetics, it is one of the most areas to develop, precisely why it is not uncommon for bodybuilders to get calf implants. Just stick to pants, and no one will be the wiser..
i once met a guy who was ALL implants, pecs, traps, biceps, triceps, abs, calfs, everything.. my aunt new him in miami. talk about twisted.
but ya calf's are hard to grow, because they really can handle a massive amount of force/weight, so getting them to grow is usually hindered by how much weight you can put on your back etc.. strict calf raises & reactive work are best imo, i wouldn't mess with negatives or anything on that level.
pc