Permanent Marker by Seedstockers

Permanent Marker is one of the loudest modern exotics around, and Seedstockers offers it as a feminized photoperiod with THC that can climb up to 33%. The name comes straight from the jar: an industrial, solvent-sharp aroma wrapped around sweet vanilla, like opening a fresh set of markers in a candy store.

The genetics come from a (Biscotti x Jealousy) x Sherb BX cross, stacking three of the most sought-after dessert lines of recent years. The result is an indica-dominant hybrid with extreme trichome density, rock-hard buds, and a heavy, long-lasting body effect.

Plants stay medium in height and return around 450–550 g/m² (1.47–1.80 oz/ft²) indoors, or 400–600 g/plant (14.1–21.2 oz/plant) outdoors in warm, dry climates. Flowering takes about 9–10 weeks, and the reward is a jar of sticky, frosted flowers with a terpene profile that stands apart from almost anything else.

Permanent Marker Lineage: Biscotti, Jealousy, and Sherb

Biscotti brings the cookie-dough sweetness and dense bud structure, while Jealousy adds gas, potency, and heavy frost. Backcrossing the result to Sherb tightens the dessert character and locks in the creamy finish and colorful calyxes.

This layered breeding is what gives Permanent Marker its unusual chemistry. Seedstockers describes the strain as a modern exotic with extreme trichome coverage, and the dense flowers are as attractive to hash makers as they are to flower connoisseurs.

Aroma, Flavor, and Effect

The aroma is pungent and instantly recognizable: industrial solvent meets sweet vanilla. It ranks among the loudest profiles in the Seedstockers catalog, so expect it to fill a room the moment a jar opens.

The flavor follows with sharp chemical sweetness up front, then earthy, gassy undertones in the middle and a creamy exhale. It is unusual, loud, and memorable, with the sweet edge keeping the gas from feeling harsh.

The effect builds slowly, then lands heavy. A hazy, euphoric headspace arrives first, followed by deep physical relaxation that anchors you to the couch. This is an evening strain: clear the schedule, put on a film or some music, and let it settle in.

Growing Permanent Marker Indoors and Outdoors

Permanent Marker is an intermediate grow. The plants reach medium height, usually 80–110 cm (31–43 in) indoors, and form ultra-dense, sticky flowers. That density is the main thing to manage: the tight buds hold moisture, so humidity control and regular defoliation matter more than with most strains.

Seedstockers recommends keeping relative humidity below 45% from week 5 of flower onward. Combine that with strong airflow through the canopy, and the risk of bud rot drops considerably. Topping, LST, or a SCROG net help create an open canopy with even light and good air exchange.

The smell ramps up quickly, so a carbon filter should be running from around week 3 of flower. Under LED with a 12/12 schedule, expect 450–550 g/m² (1.47–1.80 oz/ft²) of heavy, resin-soaked buds.

Outdoors, Permanent Marker prefers warm, dry climates and is a poor match for humid regions without dehumidification. Plan to harvest before autumn rains arrive, as wet weather is the biggest threat to those dense colas.

Permanent Marker Characteristics

Strain type	Feminized
Genetics	(Biscotti x Jealousy) x Sherb BX
Indica/Sativa	Indica-dominant hybrid
THC	Up to 33%
Effect	Heavy, sedating body relaxation with a hazy euphoric headspace
Flavor	Sharp chemical sweetness, earth, gas, creamy finish
Aroma	Industrial solvent, sweet vanilla, marker ink
Indoor yield	450–550 g/m² (1.47–1.80 oz/ft²)
Outdoor yield	400–600 g/plant (14.1–21.2 oz/plant)
Flowering time	9–10 weeks
Height	Medium, 80–110 cm (31–43 in) indoors
Difficulty	Intermediate
Best cultivation technique	Topping, LST, or SCROG with regular defoliation

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