Water Soldier Stratiotes Aloidesthis Is A Useful & Efficient Oxygenating Plant With Spreading Clumps Of Spiky Leaves. Water Soldiers Over Winter At The Bottom Of The Pond To Reappear Every Spring.floating Plants Shade The Pond & Reduce Algae While Providing Valuable Cover For Pond Life. these Plants Float On Top Of The Waterheight 10cm/4in.spread 30cm/12in. flowers June-august