We've recently got our patio paved and it's at a height. Surrounding it I would like some lovely little plants at feet and ankle as shin bright max. We've got tons of those little plastic plant pots and they fill out the lowered border of the raised patio beautifully. What plants would suit in those tiny pots? Like 5-7 CM's? Individual annuals or perhaps lavender? Would like perennials ideally but something lovely and smelly :) thanks in advance!