From the lab panel — 17-23% THC, <1% CBD. From Canadian grower reports — 400-550g/m² yield, fruity/citrus dominant in cured flower. moderate grow.

Lineage: Silver Haze × Afghani #1 gives Cobalt Haze its split personality — the lanky vertical stretch you'd expect from a Haze-dominant plant, paired with the kind of dense, resinous canopy that Afghani genetics reliably produce. Feminized seeds mean you're not spending the first few weeks of flower hunting for males, which makes the moderate learning curve here easier to manage for growers still building their skills. Indoors, you're looking at 400–550 g/m² after an 8–10 week flower period — a reasonable timeline for the yield on offer. The smell skews citrus and fruit early in flower, with a skunky edge that sharpens as harvest approaches.

Runs well in both indoor and outdoor setups; Canadian outdoor growers in BC or Ontario should aim for a mid-September finish to stay ahead of early frost. Best suited to someone past their first grow who wants a higher-THC cultivar (17–23%) without the fussiness of a pure Haze.

Genetics & Lineage

Cobalt Haze traces its genetics to Silver Haze × Afghani #1. This hybrid-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 Sensi 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

Cobalt Haze delivers THC levels of 17-23%, 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 minutes with a balanced head-and-body experience that evolves over time.

Growing Cobalt Haze

Cobalt Haze 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 400-550g/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

Cobalt Haze features a fruity, citrus, skunky, floral 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, Cobalt Haze 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 Cobalt Haze?

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 Cobalt Haze from Seennabis?

When you purchase Cobalt Haze through Seennabis, you are buying directly from Sensi Seeds — The world's oldest cannabis seed bank, founded in Amsterdam in 1985. Every order includes verified genetics, discreet shipping, and responsive seller support. Sensi Seeds has completed over 177 sales.