You can mix any two clowns and they have the ability to pair and mate. That being said, it does not mean they are likely to or will do so. Tomatoes would probably do best with other tomatoes, cinnamons, red saddles, or something that could hold its own, like a clarkii, maroon, black saddle. You can and I've seen tomatoes with percs and occs before, but this is a craps-shoot.