Querkle has two main phenotypes: one pheno is shorter and more purple, while the other trends toward the Space Queen and lacks the coloration and also has more of a Sativa effect. It's a moderate to heavy yielder, especially if it gets a long veg time and lots of root space.
Romulan and C-99 are both legendary strains despite existing on near-opposite sides of the cannabis spectrum. Striving to create a grape-tasting plant with a quicker flowering time than the original Urkle mom, TGA/Subcool opted to cross it with their Space Queen, a potent hybrid of C-99 and Romulan. This shortened flowering time and helped stabilize the plant, creating a variety with only two standard phenotypes and mostly retaining the taste/aroma of the mother.
Much like the Urkle mom, it smells of musky yet sweet grape and dark fruits — the Space Queen-leaning pheno can have notes of the C-99 sharpness as well.
Moderately sweet but with a lovely sharp quality, the flavor is much like the smell, consisting of candy grapes and musky, almost Kush-like flavors.
Depends on the phenotype — the Space Queen-dominant one generally offers a slightly more heady Sativa experience. Normally though, you can expect a relatively sedating experience with major mood elevation, body relaxation, and sleep aid at higher doses.
Subcool recommends vegging it to a large bush or growing it untopped via the SCROG method for best yield.