Sirius Black Seeds

Genetics & effects

Sirius Black is a photoperiod, feminised hybrid with uncertain or undisclosed lineage and an evenly balanced profile of approximately 50% sativa and 50% indica. Its reported THC range is 20–25%, while CBD is listed at 0–0.1%. These figures are useful catalogue references, but expression can vary with phenotype and growing conditions.

The aromatic profile combines citrus and lemon with sweet fruit, earthy wood and a pungent finish. Limonene, myrcene and beta-caryophyllene are the principal listed terpenes. Consumers commonly describe the experience as beginning with euphoric, creative or uplifting sensations before shifting towards a relaxed, calming and sometimes sleepy state. Effects are subjective and can differ between individuals.

Explore feminised seeds, high thc seeds, the Australian grow guide, and the planting calendar.

Explore feminised seeds, high thc seeds, the Australian grow guide, and the planting calendar.

Growing in Australia

Sirius Black is rated as an intermediate cultivation project. Its 8–9 week flowering period and moderate stature make it adaptable to indoor rooms and suitable outdoor settings across Australia. It is listed for hot, dry regions, temperate areas and cooler locations with shorter seasons, although local conditions remain important.

Consistent airflow, sensible spacing and routine observation can help reduce risk from heat stress, humidity and mould. For related options, browse the feminised seed collection or compare more hybrid varieties.

Indoor

Indoors, plants may reach up to 120 cm. Training and canopy management can help make the most of available height while encouraging even light exposure. The listed indoor yield is up to 500 g/m² under favourable conditions.

• Flowering time: approximately 8–9 weeks
• Indoor height: up to 120 cm
• Indoor yield: up to 500 g/m²
• Difficulty: intermediate

Monitor stretch during the transition into flowering and maintain air movement around dense foliage. Stable temperature and humidity are preferable to abrupt changes, especially as flowers gain weight.

Outdoor

Outdoors, Sirius Black may grow to up to 150 cm and produce up to 900 g per plant in favourable circumstances. In the southern hemisphere, spring planting generally falls between September and November. The best timing within that window depends on latitude, overnight temperatures and seasonal weather.

Choose a position with ample direct sun, free-draining soil and protection from severe wind. In hot, dry areas, monitor moisture consistency; in temperate or cool-short climates, prioritise early establishment and good airflow. Outdoor performance, colour and aroma can vary considerably between sites and phenotypes.

Harvest

Australian outdoor harvest usually falls between March and May, with the precise date influenced by planting time, latitude, phenotype and weather. Indoors, assess maturity after the listed 8–9 week flowering window rather than relying only on the calendar.

Potential yields are reference figures rather than promises. Environment, plant health, experience and cultivation method all shape the final result. Sirius Black is presented by Outback Seed Bank as a distinctive choice for growers seeking balanced genetics, manageable height and a layered citrus, fruit, earth and wood profile.