Old School Skunk #6 Regular comes from a narrow branch of the Old School Genetics Skunk project. Rather than a brand-new cross, it is built around phenotype #6, one of the selections Oldman Green made from his Old School Skunk BX1 family: a Skunk #1 80’s female crossed to a (Skunk #1 80’s x DC Krush) male, where DC Krush is Deep Chunk x Krush.
Collectors may remember this plant from an earlier OSG pack, Old School Skunk BX (nº3 & nº6 phenotypes), and the breeder also briefly listed it as the “Purple Acrid Pheno”. That nickname sums up its reputation: it is known for leaves that lean purple in flowering and a sharper, more acrid skunk than its siblings.
Specific per-phenotype data has not been published, so the specs on this page are the Old School Skunk BX1 family specs. For the family, Old School Genetics lists a 40% Indica / 60% Sativa ratio, 9-10 weeks of flowering (65-70 days; an older listing gave 65-75 days), 500+ g/m² (1.64+ oz/ft²) indoors and 600+ g/plant (21.2+ oz/plant) outdoors, with an outdoor finish at the beginning of October.
Each pack contains 12 regular seeds, so you will get males as well as females. That makes #6 a tool for growers who like to choose for themselves: run a population, find the female that carries the purple, acrid character, and keep her as a mother or use a strong male to push that trait into new crosses.
Purple Leaves, Acrid Funk, and Selection Tips
Old OSG notes describe the #6 expression as a narrow, Sativa-type plant whose slim leaves turn purple as flowering progresses. The flowers are described as dense, rounded and curly, and the plant is said to be productive despite its slender frame. Treat these as breeder observations rather than guarantees: in a regular pack, not every seedling will show them.
The aroma is where this pheno earns its name. The breeder describes a penetrating, acrid skunk with spicy undertones and the strange, heavy sweetness of rotting flowers. It is the polarizing, room-filling funk that old growers mean when they talk about “real” skunk, so a strong carbon filter is mandatory.
No effect profile has been published for #6 specifically. With a family ratio of 60% Sativa, the lineage suggests a Sativa-leaning skunk high in the classic style, but individual plants will differ.
Expect a narrow structure with around x4 stretch in flowering (family spec). Top once or twice, spread the branches with LST, and keep notes from week four onward on leaf color, smell and density. Clone candidates before flipping so you can keep the keeper.
Old School Skunk #6 Regular Characteristics
| Strain type | Regular (12 regular seeds) |
| Genetics | Phenotype #6 from Old School Skunk BX1: Skunk #1 80’s x (Skunk #1 80’s x DC Krush) |
| Indica/Sativa | 40% Indica / 60% Sativa (family spec) |
| Effect | Sativa-leaning classic skunk high (no official profile) |
| Flavor | Acrid, penetrating skunk, spice, rotting flowers |
| Indoor yield | 500+ g/m² (1.64+ oz/ft²) (family spec) |
| Outdoor yield | 600+ g/plant (21.2+ oz/plant) (family spec) |
| Flowering time | 9-10 weeks (65-70 days) indoors (family spec) |
| Outdoor harvest | Beginning of October (family spec) |
| Height/Stretch | Approx. x4 stretch in flowering (family spec) |
| Structure | Slender, narrow frame with narrow Sativa-type leaves |
| Bud appearance | Described as dense, rounded and curly, with leaves that can turn purple |
| Best cultivation technique | Topping, LST and pheno hunting with clones |
FAQ
What does the #6 in Old School Skunk #6 mean?
It is the selection number. Old School Skunk #6 is phenotype #6 selected by Oldman Green from the Old School Skunk BX1 family, not a separate strain.
Why is it called the Purple Acrid Pheno?
The breeder briefly listed it under that name because this phenotype is known for leaves that lean purple during flowering and an especially acrid, penetrating skunk aroma.
Are the specs specific to phenotype #6?
No. Old School Genetics has not published separate data for #6, so the ratio, flowering time, yield and stretch shown here are the Old School Skunk BX1 family specs.
What are regular seeds?
Regular seeds produce both male and female plants. They suit breeders and pheno hunters who want to select a mother plant or use a male for their own crosses.
How long does Old School Skunk #6 flower?
Family specs list 9-10 weeks (65-70 days) indoors, and an older listing gave up to 75 days. Outdoors it is ready around the beginning of October.
Will every plant turn purple?
Not necessarily. Purple leaves are a trait the breeder associates with this phenotype, but regular seeds vary, so selecting plants that show it is part of the job.
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