I have about 6in of new growth because i dyed my whole head cherrywood last summer and ive let it grow out since. My natural hair color is dark dark brown. This summer i want to touch up my 6 inches of new growth with the same cherrywood dye but ive realized that the parts of my hair that were dyed last summer are slightly faded and im worried once i dye my 6in of new growth it wont match the faded hair from last summer,
should i dye my 6in of new growth for 30min then apply the dye also to my faded areas for 10 min? or should i just dye the new growth and hope for the best?

helpp!