Fillmore Slim cannabis seeds are a feminised, indica-dominant hybrid that delivers grape-and-custard aromas with heavy resin production in just 8–9 weeks of bloom. Bred by Purple City Genetics, this strain crosses a Mac 121 x Purple Punch hybrid with Blueprint S1 (Runtz x F1 Durb x Gushers). Named after the Bay Area blues legend and "Pope of Pimpin'," it produces resin-packed buds and a hard-hitting balanced stone.
Why Fillmore Slim cannabis seeds are worth a slot in your tent
Fillmore Slim cannabis seeds earn their tent space through a dense dessert-genetics lineage and a terpene profile that rewards patience. Purple City Genetics — the Oakland breeder behind Blueprint, Hooch and Sour Peaches — built this one as a tribute to the San Francisco blues vocalist Fillmore Slim. The pedigree stacks a Mac 121 x Purple Punch mother onto Blueprint S1, which itself is a Runtz x F1 Durb x Gushers cross. That's a lot of dessert genetics in one packet, and it shows.
The terpene profile is where it earns its keep. Sweet-and-sour grape overtones sit on top, with a custard-pie underbase that comes through strongest on the exhale. On the inhale it flips — bold cream takes over the whole palate, almost pastry-like. If you've grown Purple Punch before, the grape hit will be familiar, but the creamy backbone is pure Blueprint.
Which Fillmore Slim variant you're getting
Purple City Genetics ship Fillmore Slim in 3-seed feminised packs only. No regular or autoflower versions exist for this cross. Feminised means you'll get female plants from every viable seed — no wasted tent space on males you'd need to cull.
Three seeds is the standard PCG pack size for most of their hybrids. Enough to run a small tent, or to pheno-hunt if you want to order one pack and pick the best keeper to clone forward.
Grow specs at a glance
Fillmore Slim is a compact, 8–9 week indica-dominant feminised hybrid from Purple City Genetics with heavy resin output. Full spec breakdown below.
| Breeder | Purple City Genetics (Oakland, California) |
|---|---|
| Genetics | (Mac 121 x Purple Punch) x Blueprint S1 |
| Type | Feminised, indica-dominant hybrid |
| Flowering time | 8–9 weeks |
| Plant structure | Compact, tight internodes, thick foliage |
| Indoor suitability | Excellent — tents and small rooms |
| Outdoor suitability | Good — stocky bushes with space and sun |
| Aroma | Sweet-and-sour grape, custard pie, cream |
| Flavour | Bold cream on the inhale, grape on the exhale |
| Resin production | Heavy — suitable for concentrate making |
| Seeds per pack | 3 |
Comparison to other PCG hybrids
Fillmore Slim is the shortest-finishing, most resin-heavy dessert hybrid in the current PCG catalogue. Here's how she stacks up against close cousins.
| Strain | Flowering | Structure | Best for |
|---|---|---|---|
| Fillmore Slim | 8–9 weeks | Compact, dense | Small tents, hash-making |
| Purple Punch (pure) | 8–9 weeks | Medium | Grape flavour focus |
| Runtz-line crosses | 9–11 weeks | Tall, stretchy | Larger grow rooms |
| Gushers crosses | 9–10 weeks | Variable | Sweet-cream terps |
Why this strain earns tent space over other PCG hybrids
Fillmore Slim solves a specific problem: dessert-strain flavour in a compact plant that finishes in under 10 weeks. The indica dominance keeps her short with tightly spaced internodes, which is exactly what you need in a 60x60 or 80x80 tent where every centimetre of headroom matters. She finishes in 8–9 weeks — middle of the road, nothing exotic.
The honest limitation: her vegetative growth is vigorous and the foliage is thick. If you don't defoliate and prune regularly, you'll end up with a dense jungle that traps humidity and invites bud rot. Plan on two rounds of lollipopping and at least one mid-flower defoliation. Skip that and those rock-hard buds become a liability instead of an asset.
Compared to Purple Punch on its own, Fillmore Slim brings more complexity on the nose and a heavier resin coat. Compared to a pure Runtz-line cross, she stays shorter and finishes sooner. If you want a keeper pheno for hash-making specifically, this is a stronger pick than most Gushers crosses we've seen pass through.
How to grow Fillmore Slim
Fillmore Slim responds best to a topped, defoliated canopy under 18/6 veg and a 12/12 flip at week 4. Step-by-step below.
- Germinate using the paper-towel method or straight into a small rockwool cube. Expect tails within 48–72 hours on fresh seed.
- Veg for 3–4 weeks under 18/6. She branches readily, so top once at the fifth node to build an even canopy.
- Defoliate at the start of week 2 of flower. Remove fan leaves shading lower bud sites — her thick foliage demands it.
- Flip to 12/12. Support branches by week 4 — the buds get rock-hard and dense, and side branches can snap under the weight.
- Run a second light defoliation around day 21 of flower if canopy density is still high. Watch humidity: keep flowering RH below 55%.
- Harvest at 8–9 weeks when trichomes are 10–20% amber. Dry slowly at 18°C and 60% RH for 10–14 days.
- Cure in glass jars for a minimum of 3 weeks. The grape-custard terps really come forward after 4+ weeks of curing — worth the wait.
Complete your setup: when you order Fillmore Slim, pair these seeds with a quality 80x80 grow tent and a carbon filter kit — her aroma is loud from week 4 onwards and you'll want it contained. If you're planning to press the resin, a rosin press and some 90-micron bags turn that white trichome coat into solventless concentrate. Customers who get these three items together tend to have the smoothest first run.
Sourcing and regional notes
Fillmore Slim originates from Oakland, California — documented on MAPS cannabis cultivar archives and referenced in Beckley Foundation's work on terpene profiles across modern hybrids. EMCDDA cannabis monitoring reports note that indica-dominant dessert hybrids like this cross dominate European seed-bank sales in 2024–2025. Northern European growers should expect slightly longer finish times than the 8–9 week California baseline due to lower average autumn temperatures.
Frequently Asked Questions
Are these authentic Purple City Genetics seeds?
Yes. We source Fillmore Slim cannabis seeds directly through the Purple City Genetics distribution chain. Packs arrive in original PCG branded packaging with the breeder's seal intact.
Is Fillmore Slim suitable for beginners?
She's manageable but not the easiest first grow. The vigorous foliage needs active defoliation and her dense buds require humidity control in late flower. If you've finished one or two grows before, you'll handle her fine.
How much does Fillmore Slim yield?
Purple City Genetics doesn't publish official yield figures for this cross. Growers who buy and run this strain typically report moderate-to-high yields given her compact structure and rock-hard bud density. Outdoor plants in full sun produce significantly more than indoor tent grows.
Can I grow Fillmore Slim outdoors in Northern Europe?
Yes, in a greenhouse or sheltered spot with maximum sun exposure. Her 8–9 week flowering time means she'll finish in early-to-mid October in most of Northern Europe. Watch for bud rot — her dense buds need good airflow.
What makes Fillmore Slim good for concentrates?
The thick white resin coating means high trichome yield per gram of flower. She's a strong candidate for solventless rosin pressing and bubble hash. The grape-and-cream terpene profile translates beautifully into concentrate form.
How many seeds come in a pack?
Every Fillmore Slim pack from Purple City Genetics contains three feminised seeds. This is the standard PCG pack size and gives you enough material to pheno-hunt or run a small tent.
What terpenes dominate Fillmore Slim?
The dominant notes are sweet-and-sour grape on top with a custard-pie, creamy pastry backbone. On the exhale the grape comes forward; on the inhale, cream takes over the palate.
Last updated: April 2026
