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Biennials live for 2 years, whereas perennials live for longer. As a general rule, biennial and perennial seeds should be sown in spring, but some can be sown in autumn as well. Many varieties will self-seed after flowering, giving you even more plants!
Zantedeschia aethiopica, Calla LilyMore info
Rudbeckia occidentalis 'Green Wizard'
Western ConeflowerA very curious and extraordinary plant for the back of borders. Bright green sepals, where most plants have petals and a central, almost black cone. An unusual fresh cut flower, long lasting in water, or use in dried arrangements. Easy to grow, quickly forming a good sized plant with plenty of lush green foliage and always a talking point. Flowers summer. Height: 120-152cm (4-5ft). More info
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