Deep Purple Sword are almost as hardy as regular Amazon Swords. These plants ROCK. It requires a bit more iron and nutrients to maintain its dark, lush red color. Obviously, I have always only kept them in a dirted tank. However I know Bryan keeps his in a non- dirted tank just fine with the proper dosing. (He actually had a runner he gave me of one) So either way. (non-dirt users could try a hunk of clay under the roots of one.) As a basic rule, red plants tend to like a little more iron so keep that in mind. These Deep Purple Swords are awesome and they don't last long. Grab a Deep Purple Sword.