Pineapple Upsidedown Cake sets a high bar for unusual terpene profiles. Born from a large 2017 phenotype hunt in Humboldt County, this Humboldt Seed Company signature strain smells exactly like its name: caramelized pineapple, creamy vanilla frosting, and a tangy crème brûlée finish.
Rated at 40% Indica and 60% Sativa with 22-26% THC, it delivers an effect the breeder calls immediately rewarding, uplifting, and spiritual. Its Trainwreck side adds a sharp, loud edge, while the indica genetics balance its energy.
Add a quick 45-day bloom, and this feminized hybrid becomes an easy fit for growers who want a fast, dessert-forward sativa leaner.
Lineage and Breeding
The parents are Cookie Monster x Pineapple Trainwreck. Cookie Monster contributes dense, cookie-style structure and sweet dough notes, while Pineapple Trainwreck adds tropical fruit and the loud, energetic Trainwreck character.
The current seed line is listed as Bx5 x PUC #13: five rounds of backcrossing, then a cross back to the standout #13 selection from the original hunt. That approach locks in the dessert terpenes the strain is known for.
Aroma, Flavor, and Effect
The aroma is pure bakery. Sweet pineapple comes first, followed by a thick swirl of creamy vanilla frosting. On the exhale, a tangy, burnt-sugar crème brûlée finish lingers on the tongue. The breeder sums it up in three words: just like dessert.
The effect arrives quickly. Expect an energetic, uplifting rush that lifts the mood right away, followed by a bright, spiritual headspace that the indica side keeps from tipping into jitters. It is a natural daytime choice for creative work, outdoor activities, or good company.
Terpene lovers will want to protect every gram. Dry slowly in a cool, dark room and cure in sealed jars for several weeks to keep the frosting and pineapple notes at full strength.
Growing Pineapple Upsidedown Cake Indoors and Outdoors
Indoors, expect sativa-leaning stretch in early bloom. Top once or twice and train with LST, then use a SCROG net to keep the canopy flat. Flowering takes just 45 days, which is remarkably quick for a 60% Sativa hybrid. Keep temperatures moderate late in bloom to protect the delicate dessert terpenes.
Outdoors, the breeder lists harvest from September 15 to October 10, depending on location and phenotype. Plant in full sun with good airflow, and support the branches as the colas fill. The early finish helps dodge the worst of fall weather in Northern California.
Its fast finish also makes it a good match for light-dep greenhouses, where growers can fit more than one harvest into a season.
Pineapple Upsidedown Cake Characteristics
| Strain type | Feminized photoperiod |
| Genetics | Cookie Monster x Pineapple Trainwreck, Bx5 x PUC #13 |
| Indica/Sativa | 40% Indica / 60% Sativa |
| THC | 22-26% |
| Effect | Energetic, uplifting, spiritual |
| Flavor/Aroma | Pineapple, creamy vanilla frosting, tangy crème brûlée finish |
| Flowering time | 45 days |
| Outdoor harvest | September 15 – October 10 |
| Yield | Good for a fast-finishing sativa leaner |
| Characteristics | High, unique terpene profile; dessert-like aroma |
| Best cultivation technique | Topping, LST, and SCROG |
FAQ
Is Pineapple Upsidedown Cake Indica or Sativa?
It is sativa dominant at 40% Indica and 60% Sativa.
How much THC does Pineapple Upsidedown Cake have?
Humboldt Seed Company lists THC at 22-26%.
What does Pineapple Upsidedown Cake smell like?
Pineapple and creamy vanilla frosting lead, followed by a tangy crème brûlée finish.
What are the parents of Pineapple Upsidedown Cake?
It is a cross of Cookie Monster and Pineapple Trainwreck, currently offered as Bx5 x PUC #13.
How long does Pineapple Upsidedown Cake take to flower?
About 45 days indoors. Outdoors, harvest falls between September 15 and October 10.
What are the effects of Pineapple Upsidedown Cake?
The breeder describes it as immediately rewarding, energetic, uplifting, and spiritual.
