Disa thodei, a rare orchid native to South Africa, up to 30 cm height with strongly scented white-mauve flowers mottled pink. USDA zone 7. The orchid family is one of the largest families of flowering plants with more than 20000 species worldwide. Orchids are growing from the tropics to the subarctic zone. Native to South Africa are over 450 orchid species.
Germination Techniques: Botanists use two techniques to germinate orchid seeds. The first, symbiotic germination, is a complicated process that requires use of mycorrhizal fungi, as described above. The second, asymbiotic germination, involves germinating seeds in vitro, using agar, a jellylike substance that contains necessary nutrients and growth hormones. Asymbiotic germination, also known as flasking, is easier, quicker, and more reliable for growing orchids from seed at home.
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