There's a trick to growing the Cobra plant at home: Cold, purified water. Because this Pacific Northwest native grows in waters fed by cold mountain springs, it does best when its roots are kept cooler than the rest of the plant. For a refreshing treat on a hot day, there's nothing this carnivorous plant likes more than a couple ice cubes of purified water placed directly atop its soil. Well alright, then! Available on Amazon; $2.00 for 10 seeds.