bloom blooming color colorful colors colour colourful cultivar dark flora floral flower flowers garden-flower garden-plant gold golden horticultural horticulture light nature perennial petals plant plants rose rose-bush yellow burn hazel burn nettle burn weed herb herbaceous perennial herbs itching leaf leaves medical plant medication medicine natural nettle nettles pain painful stems stinging nettle sunlight sunshine urtica dioica blooms colours annuals array budding buds cluster display foliage garden flower garden plant geranium pelargonium pink red variety white furry green hairy brown flattish garden gardens hardy iris-like pale patch summer summer flowering tough stems yellowish bright cheerful cultivars dahlia diversity flamboyant heads mixed orange perennials purple showy various botany California Tree Poppy Coulter's Matilija Poppy England english Great Britain Herbaceous plant Romneya coulteri bulbs early February Galanthus group hanging pendulant snowdrops spring Sussex