Hammerhead delivers knockout potency through a carefully crafted indica cross that balances modern American genetics with proven Dutch breeding. This feminized cultivar hits 23% THC within 8-9 weeks, producing up to 500g/m² from plants reaching 100-160cm—substantial yields even for moderate-difficulty growers. Expect euphoric effects paired with a complex flavor profile blending fruity, earthy, and sweet notes that develop throughout the cure. The autoflower seeds format offers flexibility for successive harvests, while the genetics rival the caliber of strains like Deadhead OG in the Amsterdam Seeds Company catalog. Whether you're scaling production or refining your phenotype collection, Hammerhead performs reliably indoors and out.

Genetics & Lineage

Hammerhead traces its genetics to Proprietary cross (Amsterdam Seeds Company). This indica-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 Amsterdam Seeds Company, 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

Hammerhead delivers THC levels of 23%, 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 Hammerhead

Hammerhead 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 8-9 weeks with yields of 500g/m2. Plants typically reach 100-160cm indoors. This strain responds exceptionally well to SCROG (Screen of Green) and LST (Low Stress Training), which can boost yields significantly. 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 the dense, heavy buds this strain produces.

Flavor, Aroma & Terpene Profile

Hammerhead features a fruity, earthy, 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, Hammerhead 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 Hammerhead?

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 Hammerhead from Seennabis?

When you purchase Hammerhead through Seennabis, you are buying directly from Amsterdam Seeds Company — Dutch breeder carrying Amsterdam coffee shop classics plus modern crosses (RS11, Zkittlez, Runtz). Every order includes verified genetics, discreet shipping, and responsive seller support. Amsterdam Seeds Company has completed over 32,750 sales with a 4.7-star rating from 2,592 verified reviews.