Echinopsis Werdermannianus is a columnar cactus species that is very closely related to E. Terscheckii. Both are in the Trichocereus or Echinopsis family of cactus. The two species are so close in appearance that they are often difficult to tell apart. Oftentimes, E. Werdermannianus seeds are sold as E. Terscheckii. Werdermannianus is sometimes considered a Bolivian variant or subspecies of Terscheckii. At maturity, plants may reach around 16 feet high and around 2 feet diameter with yellow to yellowish brown spines. Flowers are large and white, comparable to most Trichocereus species, especially similar to E. Terscheckii. This plant thrives best in USDA Hardiness Zone of 8 to 10.
Echinopsis Werdermannianus seeds should be spread across the surface of a sterilized cactus substrate mix. Cover the seeds with a thin layer of substrate mix and mist the surface to settle down the soil and seeds. Cover with a humidity bag, dome, or plastic wrap. Keep in a warm place with partial shade. Seeds will germinate best with high temp in the day and low temp at night. Seeds should germinate within 7-20 days. Mist or bottom water when the soil is almost dry. Even with optimal conditions, some seeds may have slow and sporadic germination. Place established plants in full sun to partial shade. Too much shade will make cactus and succulents etiolate during growth.
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