Rainbow Auto Seeds

Genetics & effects

Outback Seed Bank presents Rainbow Auto, a feminised autoflower described as Rainbow crossed with ruderalis. Its exact lineage is uncertain, so the genetic profile is best viewed as an informed catalogue description rather than a definitive pedigree. The stated balance is 50% sativa and 50% indica, offering a versatile character for growers who prefer neither side to dominate.

THC is listed at up to 18%, with CBD at up to 1%; natural variation, growing conditions and post-harvest handling can influence the final composition. Some people describe the experience as energetic, focused and uplifting, sometimes accompanied by tingly or arousing sensations. Experiences are subjective and may differ considerably between individuals.

The flavour profile leans towards sweet fruit and candy, with pineapple-like notes adding a bright tropical edge. Individual plants may show variation in aroma, intensity and colour.

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

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

Growing in Australia

Rainbow Auto is listed as beginner-friendly and adaptable to hot, dry regions, temperate areas and cool climates with short seasons. Its autoflowering habit means flowering is driven mainly by plant age rather than changing daylight hours. Australian growers commonly plan spring planting between September and November, while accounting for local temperatures, rainfall and daylight exposure.

Choose a bright position with good airflow and free-draining growing media. Autoflowers usually have limited time to recover from major stress, so gentle handling and a stable routine are preferable. Avoid unnecessary repotting, large environmental swings and persistent saturation around the roots.

Indoor

Indoors, plants are listed at up to 120 cm. A steady light schedule, suitable ventilation and enough space around the canopy may help maintain even growth and reduce the risk of humidity-related mould. Low-stress canopy positioning can be used cautiously, but heavy pruning may slow a plant during its compact lifecycle.

Indicative indoor yields are listed at up to 500 g/m². This figure is a catalogue maximum, not an assured outcome; light quality, container size, nutrition, environment and grower experience all matter.

Outdoor

Outdoors, Rainbow Auto is listed at up to 150 cm, with indicative yields of up to 600 g per plant. Select a sunny, sheltered location and monitor moisture closely. In hot, dry areas, mulch and well-timed watering can support consistency. In cool or humid districts, prioritise airflow, shelter from prolonged rain and regular checks for mould.

Successive spring sowings from September to November can provide flexibility where local conditions permit. Always consider the rules applying in your state or territory before obtaining or growing seeds.

Harvest

The listed flowering period is approximately 8–10 weeks, although the full timeline and finish date vary with phenotype and conditions. March to May is the traditional Australian outdoor harvest season, but spring-sown autoflowers may finish earlier because they mature by age rather than seasonal light change.

Assess maturity plant by plant rather than relying only on dates. Keep harvested flowers in a dark, well-ventilated space with controlled humidity, checking regularly for excess moisture. Careful drying helps preserve the sweet, fruity and pineapple-led character.