I've been using Lush henna on my hair for the best part of a year now - I started with rouge and then moved onto marron.
Whilst I love the colour it gives to my hair, I don't particularly like the hassle of actually dying it! Plus, whilst I do love the colour the henna gives me, I'm getting a bit bored of the few limited shades (I don't want to use the brun or noir henna as I'm a natural red head and really dark hair doesn't suit me!)
So... I haven't henna'd my hair for a good few months, and it is fading to red, (which actually looks quite nice, but not the shade I'm after atm) and have about 2 inches of roots...
Is there any way to dye over the henna without spending a fortune?