Swapping between my screw on filters I see the plants I take pictures of in many views. They dont all look as cool as the Infrared or Ultraviolet photos. But looking at the pictures can help explain what is happening to my modified camera.
Above the Raspberry plant photographed in Visual light 380 nanometers through 750 nanometers, by using my screw on IR/UV cut filter and setting my White balance I can isolate the light to just normal colors that most of us see.
In the overhead picture I have taken off the IR/UV cut filter. Which opens up the cameras sensor to light between 300 nanometers and 1200 nanometers roughly. Dipping into the near Infrared and UV-A/UV-B wavelengths. The image is washed out by a bright summer day, lots of infrared and ultraviolet showing up as red and white all over the image. Hah.. the plant is doing a good job reflecting it back away, stopping it from drying out.
Lastly I screw on my Infrared passthrough filter, roughly only allowing 720 nanometer wavelength light into my sensor. Giving us infrared images as a result.. Funny how easily you can see the dirt on the plant in both full spectrum and infrared.