Seed Supreme runs this as a indica autoflower line — 17-22% THC lab range, earthy/sweet-dominant terps, 8-10 weeks from seed from flip.

Lineage: the legendary G13 clone gets an autoflowering makeover here, crossed to remove the need for a light-schedule flip while keeping THC in the 17–22% range that made the original famous. Indoors, growers are pulling 400–550 g/m² in as little as 8 weeks from seed — no veg timer to manage, no transition stress. The flavour is straightforward: damp earth and a mild sweetness on the exhale, nothing showy. The indica body shows up fully, leaning heavy and slow, so plan your evening accordingly. Both tent and outdoor runs work well; Canadian short-season growers in zones 5–6 will appreciate that the 10-week-maximum seed-to-harvest window fits comfortably inside a patio grow before first frost.

Rated easy across the board, this one suits newer growers who want a no-fuss first autoflower without sacrificing meaningful potency.

Genetics & Lineage

G13 traces its genetics to G13 Autoflower (Seed Supreme genetics). This indica-dominant autoflower seed produces plants that express the best traits of its parent lineage, delivering consistent results for growers of all experience levels. Bred by Seed Supreme, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily relaxed and sleepy 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 22%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

G13 delivers THC levels of 17-22%, 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 5-10 minutes, settling into the body as a warm, heavy relaxation.

Growing G13

G13 is rated as easy difficulty, making it an excellent choice for first-time growers. The plants are resilient, forgiving of common mistakes like overwatering or inconsistent feeding schedules.

Indoor Growing: Expect a flowering time of 8-10 weeks from seed with yields of 400-550 g/m². Plants typically reach 80-150 cm 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 40-50% 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 features a earthy, sweet terpene profile that develops complexity throughout the flowering cycle. A smooth, candy-like sweetness defines the flavor, with subtle complexity on the exhale. 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 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?

This strain is ideal for beginner growers looking for a reliable, low-maintenance plant that delivers consistent results without advanced techniques. If you're looking for evening relaxation and deep stress relief, this is your strain.

Why Buy G13 from Seennabis?

When you purchase G13 through Seennabis, you are buying directly from Seed Supreme — Ranked best for overall value with a massive selection and varied genetics from top breeders worldwide. Every order includes verified genetics, discreet shipping, and responsive seller support. Seed Supreme has completed over 94 sales.

G13 vs SeedSupreme

G13 is one of the most popular strains available on SeedSupreme (Seed Supreme), a global cannabis seed marketplace known for competitive pricing, high-quality genetics, and discreet US shipping. With a massive catalog spanning feminized, autoflower, regular, and CBD strains from breeders worldwide, SeedSupreme has established itself as a go-to destination for reliable cannabis seeds with earthy and sweet terpene profiles.

While SeedSupreme offers this strain directly through seedsupreme.com, Seennabis provides a marketplace experience with deeper strain intelligence. If you've been searching for “SeedSupreme G13” or “G13 Seed Supreme review,” you've found the most detailed breakdown available — with growing guides, effect profiles, and cross-breeder comparisons that SeedSupreme product pages don't provide.

Why Buy SeedSupreme Seeds on Seennabis?

SeedSupreme is a trusted global seed marketplace — and Seennabis adds the full picture:

• Cross-marketplace comparison: Compare G13 from Seed Supreme against the same strain from ILGM, Seedsman, NASC, and other seed banks — all on one page.
• Deeper grow intelligence: Detailed cultivation guides, grower-match tools, and effect breakdowns that go beyond SeedSupreme's standard product listings.
• Broader discovery: Access 4,100+ strains from 15+ verified seed banks worldwide alongside SeedSupreme's catalog.
• Verified reviews: Real grower reports with yield data and cultivation tips from the Seennabis community.