Wikipedia defines a ruderal species as "a plant species that is first to colonize disturbed lands." Think of the smattering of plants that first appeared in the blasted lands around Mt. St. Helens in the years after the eruption of 1980. The word means "rubble” and refers to plants which are by nature hardy, aggressive, and opportunistic. Among the characteristics of a successful ruderal species are fast-growing roots, seedlings with minimal nutritional needs, and a massive production of seeds.
Enter Cannabis ruderalis, the most recently identified member of the Cannabis family, discovered 1942 in Siberia -- although it grows elsewhere in Russia, and the Himalayas as well. C. ruderalis is the runt of the family, rarely growing taller than a rangy 2.5 feet. Hardy and tenacious, C ruderalis is a full-on weed, in the original sense, able to take hold and survive in harsher conditions than either C. Sativa or C. Indica. It’s poor in THC, but it is often very rich in Cannabidiol (CBD).
Most importantly, ruderalis flowers in accordance to its age, rather than the complex changes in light cycle that characterizes the process in both Sativa and Indica. Because of its flowering cycle and its hardiness, Ruderalis has become very interesting to breeders, who want to see if these characteristics can be achieved in Ruderalis’ more famous relatives. A regular and predictable grow cycle would help maximize yield and simplify growing.
Plus... imagine a dust-blown, rocky, grim and post-apocalyptic Mad Max-like world, with all joy and happiness seemingly lost forever, drained away into the red, lifeless soil - wouldn’t it be spectacular to discover an isolated, lovely patch of green? Perhaps a hardy clump of wild hybrid Marijuana, using ruderalis power to dig in, grow, and reclaim the wasteland, replenishing and re-greening a barren planet with health bringing medicinal Cannabis.