About 2 months before my wedding my hair dresser moved and left all of my information with another girl at the salon.  I went in for my normal highlights and the new girl ruined my hair   When she took off the highlight solution my hair was yellow and white   After 5 hours she was able to get it back to a almost natural looking shade of blonde.

Now after my wedding I want to go back as close as possiable to my original hair color.  But I can't stand how my hair looks when it starts to grow out.   Can anyone give me a suggestion as to how to grow this blonde color out and not have the freakish line that is showing where my natural color starts??? 
Any suggestions??

Thanks Rapunzel for the advice.  I will call the owner of the shop tomorrow and talk with her about putting in low-lights.

I really didn't want to cut the length off my hair since it is half way down my back. This will be the only way that I can keep the length and get my hair back as close as I can to the original dirty blonde color.