Mr. Nice Seedbank occupies a singular place in cannabis history. Established in 1998, the company brought together breeder Shantibaba, pioneering seed-bank founder Nevil Schoenmakers, and Welsh author and cannabis activist Howard Marks. Its catalog was built around parent plants already responsible for celebrated varieties of the Amsterdam era rather than a constantly changing supply of outside crosses. That foundation gave Mr. Nice a reputation for old-school Haze, Skunk, Afghan, Northern Lights, and Widow genetics maintained through deliberate selection.
The name came from Marks, whose autobiography Mr Nice transformed him from an internationally known cannabis smuggler into a public advocate, writer, and performer after his 1995 release from a U.S. prison. Marks supplied cultural visibility and a philosophy of access, while Shantibaba and Schoenmakers supplied the breeding knowledge and genetic library. Although Marks died in 2016 and Schoenmakers in 2019, Mr. Nice continues operating around material established during their partnership.
Three Figures From Different Cannabis Traditions
Shantibaba began collecting and cultivating cannabis during the 1970s, later traveling widely in search of regional seed populations. He has described indoor growing in Australia by approximately 1978 and work with Mullumbimby Madness in northern New South Wales during the 1980s. After moving to Europe, he entered Amsterdam’s breeding scene and founded Green House Seed Company in the mid-1990s. There he worked with Schoenmakers and helped develop or preserve genetics that won major Cannabis Cup recognition.
Schoenmakers had already changed the seed trade through The Seed Bank, the 1980s company that preceded the modern Sensi Seeds organization. His access to Northern Lights, Haze, Skunk, Afghan, and other foundational plants made him one of the most consequential breeders of the Dutch era. Shantibaba met Marks during the 1990s, and the three discussed creating a company focused on pedigree plants. Mr. Nice was established after Shantibaba sold his Green House interest and transferred his breeding stock into the new operation.
A Living Library of Parent Plants
The original Mr. Nice program was built around approximately 40 proven mother and father plants. Shantibaba later described a Swiss nursery containing 42 original selections capable of repeatedly producing the same F1 seed families, aromas, and flowering traits. The collection combined his breeding work with plants maintained by Schoenmakers. It allowed the company to reproduce established lines from living parents instead of reconstructing famous names from loosely related commercial seed.
That distinction became central to the Mr. Nice identity. Shantibaba argued that a breeder’s most valuable assets are selected parents accumulated over years of testing, not simply names printed on seed packets. Haze A and Haze C males, Northern Lights #5, Skunk #1, Afghan selections, the Brazilian and South Indian parents behind the Widow family, and other plants reappear across multiple releases. Growers receive populations intended for selection rather than identical plants built around one fashionable phenotype.
Black Widow and the Renaming of Established Genetics
Black Widow is Mr. Nice Seedbank’s best-known example of genetic continuity under a new name. The company identifies it as the original White Widow breeding line, created from a Brazilian sativa and a South Indian hybrid. The earlier version won the 1995 High Times Cannabis Cup and became famous for exceptional resin production. After leaving Green House, Shantibaba renamed his version Black Widow to distinguish seed made from his original parents from unrelated offerings sold under the White Widow name.
Other Mr. Nice cultivars preserve or revise genetics associated with older commercial names. Medicine Man continues the plant once sold as White Rhino, combining the Widow family with a high-yielding Afghan. Critical Mass is described as a reworked version of the older Big Bud concept, pairing Afghan and Skunk #1 for heavy flowers and a short bloom period. Shit preserves an Afghan-dominant Skunk family, while Ortega revisits Northern Lights #1 and #5 material from 1980s seed stock.
Super Silver Haze, Mango Haze, and Nevil’s Legacy
Super Silver Haze is the major name Mr. Nice retained unchanged. Its pedigree combines Skunk, Northern Lights, and Haze, with the company listing the genetic balance as 25 percent Skunk, 25 percent Northern Lights, and 50 percent Haze. Developed by Nevil and Shantibaba, it won the High Times Cannabis Cup in 1997, 1998, and 1999. Those victories helped establish the model of a practical indoor Haze hybrid: expansive, aromatic, and cerebral, but faster and more productive than a largely tropical plant.
Mango Haze shares a parallel family structure, using a sister of the Super Silver Haze mother and the same Haze father. Mr. Nice lists it as 25 percent Northern Lights #5, 25 percent Skunk, and 50 percent Haze, with selections known for ripe mango aroma and cerebral effects. Neville’s Haze moves closer to the tropical side through NL5/Haze A crossed with Haze C. These lines preserve different expressions of related parents rather than treating “Haze” as a generic marketing label.
Critical Mass and the Practical Side of the Catalog
Not every Mr. Nice cultivar is designed for a connoisseur willing to wait months for flowering. Critical Mass represents the company’s production-oriented side. Its Afghan and Skunk #1 pedigree was selected for unusually heavy flowers, rapid finishing, and a strong physical effect. The official description warns that the same density responsible for its yield can make the plant vulnerable to mold in humid conditions. This practical honesty is characteristic of a catalog that often discusses weaknesses alongside desirable traits.
Critical Mass became a foundation for Critical Haze, Critical Skunk, and CBD-rich projects, extending its yield and fruit character into several directions. Medicine Man serves a related role within the Widow family, combining resin and potency with Afghan structure. Other lines such as Master Kush Skunk, Nordle, Early Queen, and G13 Haze broaden the catalog without abandoning its original building blocks. The range includes difficult long-flowering sativas, accessible indoor hybrids, greenhouse plants, and high-yield selections.
Selection Over Uniformity
Mr. Nice has historically emphasized regular seed and the breeder’s role in identifying exceptional males and females. This differs from a market increasingly dominated by feminized seeds, clone-only releases, and tightly narrowed populations. A pack may contain meaningful variation in structure, aroma, flowering time, and effect because the buyer is expected to select according to individual goals. For collectors and breeders, that variation can be useful because it reveals more of the parental range and supplies potential breeding stock.
The approach also requires realistic expectations. A grower seeking one perfectly uniform canopy may find some Haze families demanding, while an experienced selector may value discovering an unusual keeper. Official descriptions frequently specify broad flowering windows and acknowledge that some phenotypes are impractical indoors. The philosophy is less about guaranteeing one photograph from every seed and more about providing tested genetic families with enough diversity to continue evolving.
Medical Breeding and CBD-Enriched Genetics
Medical cannabis became an increasingly important part of Shantibaba and Howard Marks’ work. Shantibaba has connected that interest to friends who benefited from cannabinoid-rich cannabis and to Swiss projects involving plant nurseries, extracts, and tinctures. Mr. Nice later became closely associated with CBD Crew, a collaboration created to develop seed lines with more predictable CBD expression when most commercial cultivars had been selected primarily for THC.
CBD Mango Haze became one of the best-known results. Released in the early 2010s, it combined Mango Haze qualities with CBD-enriched breeding material. Current company descriptions report plants around balanced THC-to-CBD ratios, with some leaning more strongly toward CBD. The project signaled an important change in seed marketing: cannabinoid ratios could become defined breeding objectives rather than accidental discoveries. It extended the Mr. Nice library into patient-oriented cultivation without discarding aroma, vigor, or finished-flower quality.
Mr. Nice Seedbank Today
Mr. Nice remains active through its seed shop, auction platform, breeder forum, and connected Shantibaba and CBD offerings. In 2026, official listings continue to include Black Widow, Super Silver Haze, Mango Haze, Neville’s Haze, Critical Mass, Medicine Man, Afghan Haze, and other long-established lines. The auction system offers standard and limited releases at variable prices, reflecting the company’s stated aim of keeping genetics accessible and encouraging growers to spread them through their own gardens and selections.
The seed bank’s importance comes from continuity. Many companies sell versions of Widow, Haze, Critical, Northern Lights, and G13 hybrids, but Mr. Nice connects those categories to breeders and parent plants that shaped their early commercial history. Its catalog is not frozen in the 1990s; CBD lines, limited Haze projects, and newer combinations have expanded it. Yet the identity still depends on pedigree, preserved parents, selection, and the belief that genetic diversity should remain in growers’ hands. Mr. Nice is both an active breeder and a living archive of the formative Dutch seed era.
