Black Widow Seeds

Genetics & effects

Black Widow is a feminised cannabis variety created from South American sativa × South Indian indica genetics, with an estimated 40% sativa and 60% indica profile. Kiwi Seed Bank presents this cultivar in its catalogue for growers seeking robust branching, generous flower potential and a bold aromatic character.

THC potential is listed at 18–28%, while CBD is estimated at 0.1–1.5%. These figures are indicative rather than assured, as cannabinoid expression can vary with phenotype, environment and cultivation choices. The terpene profile features myrcene, caryophyllene and pinene, supporting a layered mix of fruit, pine, skunk and dry wood.

Experiences are subjective. Some people describe Black Widow as happy and talkative at first, followed by a more relaxing, sleepy mood. Increased appetite is also sometimes reported. Individual impressions may differ according to personal sensitivity, setting and the finished flower.

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

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

Growing in New Zealand

Rated as an intermediate option, Black Widow suits growers able to monitor humidity, nutrition and canopy development consistently. It can adapt to temperate conditions but generally favours warmth and relatively dry air. In New Zealand, outdoor planting is typically planned for spring, from September to November, once local temperatures are reliably suitable.

Regional conditions vary considerably. Northern areas may offer a longer warm period, while cooler or wetter locations can require extra attention to site selection, airflow and shelter. Choose a position with strong direct light and avoid low-lying pockets where cool, damp air collects.

Indoor

Indoors, plants may reach up to 160 cm. Training and an even canopy can help manage stretch and distribute light across productive sites. Its branching structure can suit topping, gentle tie-down methods or a supported screen when adequate recovery time is allowed.

• Flowering time: approximately 8–10 weeks
• Indoor yield: up to 700 g/m² in favourable conditions
• Indoor height: up to 160 cm

Maintain steady airflow around dense growth and avoid prolonged humidity spikes. Regular inspection, thoughtful spacing and timely removal of excess inner foliage may reduce mould risk as flowers gain weight.

Outdoor

Outdoors, Black Widow may grow up to 200 cm with enough root space, sunlight and seasonal warmth. A hot, dry or temperate setting is preferred. Wind protection can be useful, although some airflow through the branches remains important. Supports may help hold heavier flower clusters later in the season.

• Outdoor yield: up to 800 g per plant in favourable conditions
• Outdoor height: up to 200 cm
• Preferred climate: hot and dry to temperate

Yield and height are estimates, not promises. Container size, soil quality, sunlight, weather and phenotype all influence the final result.

Harvest

For New Zealand outdoor gardens, harvest commonly falls between March and May. Exact timing depends on planting date, latitude, phenotype and autumn weather. Monitor flower maturity and local conditions rather than relying on the calendar alone. If rain is forecast, improve shelter and airflow while checking dense flowers frequently for excess moisture or mould.