growing light green crystal marijuana without red hairs

Hello,
i was wondering if any body grows light green very crystally marijuana that has pretty much no brown or red hairs. Most people from alberta canada would know this type of marijuana as "hemp star". i just finished cropping out two different strains. one was white widow crossed with big bud and the second was critical mass. i waited for the hairs on both of them to turn about 3/4 red before cropping out but i wanted to get that light green look that "hemp star" consists of and not the more brown or dark weed that i ended up with. I was wondering if any body knows how this type of weed is grown. My understanding was that a properly matured bud has red hairs so does the grower crop out early before properly matured to keep their hairs light?
if any body knows i would much appreciate the help
thank you.
 
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