An ideal category image is 300px X 300px. Also, make sure the image is compressed to a 50% compression level on this website:
http://jpeg-optimizer.com/
Update Image
Images are compressed and resized to 600 X 600. Make sure you are starting with a square image that is at least this size please.
-herb-1665579152.jpg)
-lime)-philodendron-1706647839.jpg)
