Forgive my stupidity here, these are infra-red right?
If so, how are you getting them? I remember years ago when I was doing 35mm photography you could buy infra red film but have never seen this option on any digital camera. If they are not infra-red then how are you getting the colours?
Would love to know your technique as your gallery is one of the most amazing I have ever seen - anywhere!
Professionally modify your dslr for about $300 to shoot in the full electromagnetic spectrum. Then, play with different colored filters on your camera. Then, adjust the image based on your creative impulse.