border color colour England english flowers garden gravel Great Britain greenhouse nature path perennial petals plants shingle stems summer blooms bright cheerful cultivar dahlia flamboyant head passionate plant pompom red sanguine showy Anagallis arvensis flora herb natural orange Pembrokeshire scarlet pimpernel spring wales welsh wild bulbs February Galanthus hanging pendulant perennials snowdrops Sussex white Cardamine pratensis Cruciferae Lady's smock mauve Australian bloom bush bush plant colorful colourful doplets drops flower full bloom grevillea loops loopy native rain shrub stamen strange tendrils unusual unusual shape water culinary edible marjoram oregano Origanum vulgare South Downs Cornus suecica Dwarf Cornel green leaf leaves montane norway norwegian rock Buckinghamshire Dark Mullein Scrophulariaceae spikes Verbascum nigrum yellow