Genetics possibly? I'm still new and learning, but I happen to have a white widow about the same age now, it's the most finicky plant I've ever grown (I've grown alot of photos, new to autos). My widow is white as snow, outside of a lockout that discolored all the fan leaves. Hopefully someone smarter than myself can give you a proper answer.
My white widow is also from ilgm, but like I said my buds are snow white, weird we just never know what's going to come out of the seedsSeeds are from ILGM. The one thing that comes to mind is the high temps I was battling but isn't purple brought out by lowering temps? q
Ya but environment controls if purple or not and genes to a certain extent my widow didn't purple but was good. Some purple strains will purple regardless thoMine also were from ILGM. Weird!
I also grow lots of vegetables and if I bought seeds for a pumpkin and the picture on the package showed an orange pumpkin and then I grew it and it was white……I’d be pissed.