I want to henna my hair for the pretty red color and for the strengthening that I have heard it lends to hair strands.  I have, however, about 2 inches of new growth.  I have heard that henna can make it hard for commercial dyes to 'take';  does it also make it hard for a relaxer to take?  I am on a six month stretch, so I plan to tex-lax my hair in two  months.
Thanks.
				
			Thanks.