help: wilting plants and purple stems

one of my plants is wilting and the top leaf stems are turning purple. this is the only plant that turned out like this while the others seem to be doing fine. anyone know whats going on? and is this plant savable?

thanks a lot!

Do you have any pics cause theres different types of problems depending on how it is wilting using epsom salt can help the purple stems about 1 tsp. per gal

Here is a good site to check out your plant problems. You should really post some pics in the future so we have a better idea of what the problem is. Anyway, good luck. Marijuana Plants Problems - Yellow Leaves, brown spots, nutrient shortage etc.