Black Jack Auto Seeds

Genetics & effects

Black Jack Auto is a feminised autoflower combining Jack Herer, Black Domina and an autoflowering ruderalis lineage. Its roughly 50% sativa and 50% indica profile brings together compact growth, straightforward timing and a broad flavour range. Kiwi Seed Bank presents this cultivar for growers seeking an accessible option with a manageable 60–110 cm stature.

THC is listed at 18–23%, while CBD is listed at 0.1–1%. Individual experiences can vary, but some people describe the effect as uplifting, energetic or focused at first, followed by a calmer and more relaxed mood. Others may find its balanced character suits creative downtime. Aromas and flavours may include sweet berry, blueberry, incense, sour spice and peppery warmth, shaped by a terpene profile featuring myrcene, caryophyllene and pinene.

Explore autoflower seeds, high thc seeds, the New Zealand grow guide, and the planting calendar.

Explore autoflower seeds, high thc seeds, the New Zealand grow guide, and the planting calendar.

Growing in New Zealand

As an autoflower, Black Jack Auto moves into bloom according to age rather than a change in daylight hours. This can make planning simpler for newer growers and those working within a short seasonal window. In New Zealand, outdoor spring planting generally falls between September and November, once local conditions are suitably settled. Explore more compact options in the autoflower seed collection.

This cultivar is listed for hot, dry areas, temperate districts and cooler regions with shorter summers. Even so, local wind, rain, humidity and overnight temperatures can influence performance. Choose a bright position with airflow and free-draining soil. During damp spells, avoid persistently wet foliage and crowded growth to reduce the risk of mould.

Indoor

Indoors, plants commonly stay within 60–110 cm, making them suitable for spaces where vertical room matters. A light, airy medium and restrained feeding are sensible starting points because autoflowers have limited time to recover from major stress. Gentle canopy positioning can help distribute light, while heavy pruning may slow a compact plant.

Flowering is listed at approximately 6–7 weeks. Indoor yield is listed at up to 550 g/m² under favourable conditions, though plant health, lighting, environment and grower experience all affect the final amount. Keep humidity stable and maintain airflow around developing flowers.

Outdoor

Outdoor plants are also listed at 60–110 cm, which may suit patios, sheltered gardens or discreet sunny corners. Select a location with strong daily light and protection from harsh gusts. Containers offer flexibility during cold snaps or extended rain, while breathable soil supports healthy roots. Outdoor yield is listed at up to 250 g per plant under favourable conditions, with natural variation expected.

Harvest

For New Zealand seasonal planning, the main outdoor harvest period is March to May. Autoflower maturity also depends on the individual plant’s age and development, so use visible readiness rather than the calendar alone. Look for swollen flowers, fading fresh pistil growth and the desired trichome colour. Check flowers closely after wet weather, handle them carefully and dry them in a dark space with steady airflow.