I get my hair colored every 5 weeks, and I get it trimmed every third through fifth time. My hair guy just does it when the hair needs it. He did say that if I wanted to grow it out, it'd be a lot harder to do if I got it trimmed every time I had it colored. If the ends look fine, I'd leave it.
Kiva! Microfinance works.

Med/Coarse, porous curly.