I have concrete, so a water barrel surrounded with stones and terracotta pots, plus two large bits of tree trunks i want to biodegrade to encourage nature.I would like a small water lily (pink/white) but what nice grass can i also include in the barrel and maybe a third different shaped plant? also in the surrounding pots i hope to plant plants that will ‘wander and creep’ over all things, including the trunks. I have bought some sedums and also ‘golden oats’ I love textures so that is what i want to create around this feature.7