According to Carlos Fuente Jr and a few other manufactures in publicized interviews, it's the other way around. High magnesium = white ash.
I've been smoking cigars for 18 years with about a 5 or 6 year break in the middle and you want to know what I've found about ash color?
It doesn't mean jack shit. I've had great cigars with white ashes, gray ashes, black ashes and horrid cigars with white ashes, black ashes and gray ashes. Certain tobaccos, grown under certain conditions, produce ash of _____ color. Take that same tobacco, grow it somewhere else, pump the same nutrients into the soil (and tobacco needs TONS of fertilizer and nutrients - it is a very hungry plant, one of hungriest actually), and it tastes a bit different, but equally good, now it has an ash that's kind of ______ in color.
Thunder.Gerbil wrote: