My short hair goes from being artfully piecey to a crunchy, dried out rat's nest in mere hours, thanks to a recent foray into platinum blonde-ness. I love the color, and I love the texture the color gives me, but I definitely don't like how dried out it gets. It sucks up hair serum by the gallon.
This Sally Hershberger Hyper Hydration spray that I've recently discovered is helping--I've been using it on my wet hair every time I shower and before I dry it. It's much better than some leave-in conditioners I've tried, because short hair can get really weighed down and greasy-looking--which is almost worse than the rat's nest scenario. And I don't know if this is how you're supposed to use it, but I spritz it on during the day, too, if things are starting to look a little arid on top of my head.
Get it here.