Schick and Paramount hybrids bloom in repeated flushes, the first typically in April with successive flushes in May-July and sometimes into August-October;
Growing & propagation
Schick and Paramount hybrids bloom in repeated flushes, the first typically in April with successive flushes in May-July and sometimes into August-October; at the Huntington stray flowers have been recorded in every month of the year, and flower form/color can vary with the temperature at which a bloom opens. [https://media.huntington.org/Schick/catalogintro.html]
History
Bob (Robert) Schick of Northridge, California built on Harry Johnson's Paramount work, repeatedly crossing and re-crossing plants in his backyard nursery; Johnson's hybrids frequently served as parents to Schick's hybrids and the two corresponded. [https://www.huntington.org/verso/echinopsis-queen-day; https://freakycacti.com/info/harry-johnsons-paramount-echinopsis-lobivia-trichocereus-cactus-hybrids/]
Robert Schick introduced 128 named hybrids through The Huntington's International Succulent Introductions (ISI) program from 1986 through 2004, establishing one of the most widely distributed bodies of named Echinopsis/Trichocereus flowering hybrids. [https://www.huntington.org/verso/echinopsis-queen-day; https://media.huntington.org/Schick/abouthybrids.html; https://media.huntington.org/Schick/catalogintro.html]
Clone genealogy
Schick's provenance system gives each hybrid three tracking numbers: an ISI number (introduction year and sequence), an HBG number (Huntington accession, consecutive since 1930), and a Schick cross number plus clone designation (e.g., E. 'Rosalie', Schick #77-4); typically fewer than 50 seedlings germinate per cross and are numbered cross#-clone#, with most discarded and only exceptional clones named. [https://media.huntington.org/Schick/abouthybrids.html]