The specs in one line: 20-25% THC, <1% CBD, 8-10 weeks flowering, 400-500g/m2 reported. Best indoor or outdoor. moderate grow.

Lineage: G13 x Nebula, a Blimburn cross pairing the storied government-vault G13 with Paradise Seeds' Nebula, produces a sativa-leaning plant that earns its moderate difficulty rating honestly — you'll need to manage stretch during the first few weeks of flower, but the payoff is real. Lab results consistently land between 20–25% THC with negligible CBD, and growers working both indoor tents and outdoor raised beds have pulled 400–500 g/m² after the 8–10 week finish. The nose opens with bright citrus and soft fruit, then settles into a familiar skunky base that old-school growers tend to appreciate.

In Canadian conditions, indoor runs benefit from a light defoliation around week three to improve canopy airflow as humidity climbs in fall. Expect a cerebral, energetic effect profile without much body sedation — better suited to daytime use than winding down. This one rewards growers who've got a harvest or two under their belt and want a higher-THC sativa without a difficult phenotype hunt.

Genetics & Lineage

G13 x Nebula traces its genetics to G13 x Nebula (Blimburn Seeds). This sativa-dominant feminized seed produces plants that express the best traits of its parent lineage, delivering consistent results for growers of all experience levels. Bred by Blimburn Seeds, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily relaxed and euphoric effects, making this strain ideal for evening use and unwinding after a long day. The body-centered stone builds gradually, easing tension and promoting deep physical relaxation. With THC levels reaching 23%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

G13 x Nebula delivers THC levels of 20-25%, placing it in the moderate-to-strong range that most regular consumers find comfortable. CBD content is minimal, so the psychoactive effects are front and center. The onset typically arrives within minutes, starting as a cerebral buzz that gradually expands.

Growing G13 x Nebula

G13 x Nebula is rated as moderate difficulty, making it suitable for growers with some experience. Basic knowledge of nutrient schedules, pH management, and environmental controls will help maximize results.

Indoor Growing: Expect a flowering time of 8-10 weeks with yields of 400-500g/m2. Plants typically reach 100-180cm indoors. Standard training techniques like topping and LST will help manage height and improve light penetration. Maintain temperatures between 68-80°F with relative humidity around 45-55% during flowering.

Outdoor Growing: This versatile strain performs well in both indoor and outdoor environments. Outdoor growers in warm climates can expect harvest from late September through October. Watch for humidity during late flowering to prevent bud rot, especially with dense flower formations.

Flavor, Aroma & Terpene Profile

G13 x Nebula features a fruity, citrus, skunky, sweet terpene profile that develops complexity throughout the flowering cycle. Sweet berry and grape notes dominate the inhale, with a sugary exhale that lingers on the palate. The aroma intensifies significantly during the final 2-3 weeks of flowering — carbon filtration is recommended for indoor grows requiring discretion.

Medical Benefits

While individual experiences vary, G13 x Nebula is commonly reported to help with stress relief, chronic pain, insomnia, and muscle tension. The deeply relaxing effects make it a popular choice among medical users seeking nighttime relief. As with any cannabis strain, start with a low dose and increase gradually. Consult a healthcare professional before using cannabis for medical purposes.

Who Should Grow G13 x Nebula?

This strain is ideal for intermediate growers ready to push their skills and be rewarded with superior results. If you're looking for evening relaxation and deep stress relief, this is your strain.

Why Buy G13 x Nebula from Seennabis?

When you purchase G13 x Nebula through Seennabis, you are buying directly from Blimburn Seeds — Barcelona-based breeder with one of the largest feminized + autoflower catalogs in Europe — 1,245 strains spanning Spanish classics, exotic American hybrids, and modern cookie/cake genetics. Every order includes verified genetics, discreet shipping, and responsive seller support.