I've only made one knife with a cherry handle. I had the same trouble with it splitting. It was a full tang and I cracked 4 out of 6 handle slabs getting it fitted up. Two actually cracked as I was drilling the pin holes. One cracked as I was setting the pins. One cracked in the vise on my drill press before I even began to drill the holes. It was a lot of work. The cherry came from a friends orchard, from a tree that had been struck by lightning. I was making the knife for him, so the cherry had sentimental value to him. Plus, I had plenty of cherry to replace what was cracking. It turned out nice....eventually.
I've wondered how the patina of that knife has changed over the years. I've lost contact with him in the past three years. I think I'll try contacting him again.