I grew Reeferman’s Willie Nelson a while back and it was a lot of fun. Being a Vietnamese / Nepalese hybrid it fits my tastes rather well. Of course being a sativa you are looking at roughly around 70 to 75 days, roughly 10 weeks, for flower and they do grow tall so they are not for everyone.
Edit: Now that I think about it more I believe mine ended up going more like 80 or 85 days. I do remember that it did take a little longer than the flowering time that was given for Willie Nelson at the time.