Black Widow Auto Seeds

Genetics & effects

Black Widow Auto is a feminised autoflower created from Black Widow and a ruderalis autoflowering lineage. Its profile is approximately 60% indica and 40% sativa, combining compact growth with a relatively brisk seed-to-harvest schedule. Outback Seed Bank presents this variety in its autoflower seed catalogue for growers seeking a potent, intermediate-level project.

THC potential is listed at 15–19%, with CBD at 0.1–0.6%. Individual experiences vary, but the effects may feel cerebral, energetic and strong, sometimes developing into a heavier, more grounded sensation. The aroma and flavour can bring together sweet berry and fruity notes with earthy wood, skunk and fresh pine. Myrcene, caryophyllene and pinene are the prominent listed terpenes.

Explore autoflower seeds, outdoor seeds, the Australian grow guide, and the planting calendar.

Explore autoflower seeds, outdoor seeds, the Australian grow guide, and the planting calendar.

Growing in Australia

Black Widow Auto can suit hot, dry districts, temperate regions and cooler areas with short summers. Its autoflowering cycle does not rely on changing daylight hours, making timing more flexible than with photoperiod cultivars. For outdoor Australian gardens, spring planting generally falls from September to November. Local temperatures, rainfall, humidity and daylight intensity should guide the exact start date.

This cultivar is best matched to growers with some prior experience. Use free-draining soil or another airy medium, and avoid overwatering while roots establish. Moderate feeding is preferable to sudden nutrient increases. Good spacing and steady airflow help reduce the risk of mould, particularly where summer humidity or autumn rain is common.

Indoor

Indoors, plants may reach up to 90 cm, making them suitable for compact tents and rooms with limited vertical space. A stable light schedule can be maintained from seedling through bloom because flowering begins according to age. Gentle low-stress shaping early in the cycle may open the canopy, but allow time for recovery and avoid heavy work once flowering is established.

Flowering is listed at approximately 8–10 weeks, although total timing and final size vary with environment and plant health. Under favourable conditions, indoor yield potential is listed at up to 400 g/m². This figure is a reference rather than a guaranteed outcome.

Outdoor

Outdoor plants may grow up to 110 cm and can produce a sturdy, branching shape in strong light. Choose a sunny position with airflow and shelter from prolonged heavy rain. In hot, dry areas, mulch can help moderate root-zone temperature and moisture swings. In cool or short-season regions, select the brightest available location and avoid exposed frost pockets.

Outdoor yield potential is listed at up to 210 g per plant under favourable conditions. Pot size, soil quality, pests, weather and grower technique can all influence performance, aroma, colour and flower density.

Harvest

Australia’s main autumn harvest period runs from March to May. Assess each plant individually rather than relying only on a calendar date. Mature flowers may become denser and more aromatic, while resin glands gradually shift in appearance. Harvest during a dry weather window where possible, handle flowers carefully and maintain clean tools and good ventilation after cutting.