Hi @Loobylou. I tried the Herbatint dye about 8 weeks after chemo on my platinum grey regrowth and it hardly did a thing.
I then waited another month and went to my hairdresser for my usual ash blonde colour but same result really. The new hair just didn't want to know about getting dyed! :D
Another 6 weeks on and the colour took hip hip hooray!
A friend gave me Benefit 'Gimme Brow' eyebrow gel when I started to get my eyebrows back and I've been hooked since.
Its expensive but cheaper in the States (used to be haven't checked since our dollar went south!)so I always ask any friends or family to grab me one if they're travelling over there.
Stay well and all the best xox