aluminium climber England english flowers frame garden glass Great Britain green greenhouse grow hobby leisure pastime plants strut wisteria architecture border building flagstones hedge home house path Polesden Lacy shutters Surrey windows aggressive-grower allium-triquetrum Amaryllidaceae blooming blooms bulbous-flowering-plant edible fast-spreading flower-stalks flowering introduced invasive leaves Mediterranean-import onion-weed profusion snowbell stalks three-cornered-leek white color colour gravel nature perennial petals shingle stems summer bright cheerful cultivar dahlia flamboyant head passionate plant pompom red sanguine showy bedding flower lilac natural purple.mauve see through slender slim tall thin verbena innocence innocent pure purity rosa rose wiltshire Australian beautiful blossoms creation gardening illustration love native pretty scrapbooking syzygium tree yellow bulbs February Galanthus hanging pendulant perennials snowdrops spring Sussex box Buxus dutch elegance elegant formal hedging shaped style topiary wall walled