You could be experiencing some root rot, are they drying out prior to watering?
Purple Daddy Reviewed by Purple Daddy on . help dyeing plants HELP started growing on porch in soil doing very good 3ft tall started 2 dye on bottom going up took dyeing buds off started 2 grow on bottom still dyeing in middle tops for now doing good but haft of plant is dying no bugs had ints but no more Rating: 5