Critical Purple Auto Seeds

Genetics & effects

Critical Purple Auto is a feminised autoflower built around a reported Critical Mass × Big Bud × ruderalis lineage. Its profile is approximately 80% indica and 20% sativa, combining a compact structure with the automatic flowering response associated with ruderalis genetics. Outback Seed Bank presents this seed as a beginner-friendly option for growers seeking a relatively short flowering phase and manageable height.

Reported THC levels range from 18–25%, while CBD may reach up to 0.7%. Individual plants and finished flowers can vary according to phenotype, environment and harvest timing. Aromas and flavours are commonly described as earthy, sweet and woody, with a citrus edge. Some people describe the experience as calming, deeply relaxed or sleepy, sometimes accompanied by a tingly sensation or increased appetite. Effects are subjective and may differ from person to person.

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

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

Growing in Australia

This autoflower is suited to hot, dry and temperate Australian conditions. Its automatic life cycle means flowering is guided mainly by plant maturity rather than a seasonal change in daylight. For outdoor cultivation, spring planting from September to November can provide warm conditions and increasing daylight, although local temperatures, rainfall and humidity should guide timing.

Autoflowers generally have limited time to recover from major stress. A stable environment, gentle handling and a simple cultivation plan are therefore useful. Avoid frequent repotting, abrupt environmental changes and excessive feeding. Good airflow and sensible spacing can reduce the risk of mould, particularly in humid coastal areas or during wet weather.

Indoor

Indoors, Critical Purple Auto may reach up to 90 cm and has a reported yield of up to 400 g/m². These figures are indicative rather than assured. Container size, lighting, airflow, nutrition and phenotype all influence the final result.

• Height: up to 90 cm
• Flowering phase: approximately 7–8 weeks
• Reported yield: up to 400 g/m²

Its compact frame can suit smaller spaces, but each plant still needs room for air movement and light exposure. Keep humidity controlled around developing flowers and inspect dense growth regularly. Gentle canopy management early in the life cycle may help maintain an even shape without placing unnecessary stress on the plant.

Outdoor

Outdoors, plants may grow up to 120 cm and produce up to 200 g per plant in favourable conditions. A sunny, sheltered position with free-draining soil is preferable. Hot, dry regions may require consistent moisture monitoring, while temperate or humid areas benefit from strong airflow and protection from prolonged rain.

• Height: up to 120 cm
• Reported yield: up to 200 g per plant
• Climate fit: hot, dry and temperate areas

Cool nights may encourage deeper purple colour in some phenotypes, though colour expression is not assured. Because autoflowers progress quickly, early root development and steady conditions can have a strong influence on performance.

Harvest

Australian outdoor harvests commonly fall between March and May for seasonal crops, but an autoflower started in spring may finish earlier because its cycle is based primarily on age. Use plant maturity rather than the calendar alone to judge readiness. Check flower development, aroma and trichome appearance, then harvest during dry weather where possible. Careful drying in a dark, ventilated space helps preserve this variety’s earthy, sweet, woody and citrus character, which may make it a favourite among fans of rich indica-style profiles.