Hellfire OG Auto Seeds

Hellfire OG Auto is a feminised autoflower that combines Hellfire OG genetics with ruderalis. Its compact structure, bold citrus-diesel profile and short flowering phase make it an appealing option for growers with limited space or a shorter seasonal window. Outback Seed Bank presents this cultivar for growers seeking a potent, aromatic auto with balanced daytime and evening character.

Genetics & effects

This cultivar is listed as approximately 70% indica and 30% sativa, with a likely indica-dominant growth pattern. THC potential is listed at 20–29%, while CBD is listed at 0–0.5%. Actual cannabinoid levels can vary with phenotype, environment, plant health and harvest timing.

Individual experiences may differ, but Hellfire OG Auto may feel euphoric, happy and sociable at first, with creative or energetic impressions giving way to a more relaxed finish. Its aromatic profile may combine lemon, sour citrus, diesel, pine, herbs and pepper. Limonene, beta-caryophyllene, myrcene and pinene are the principal listed terpenes.

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

Hellfire OG Auto is suited to temperate areas and cool regions with short summers. As an autoflower, it begins flowering according to age rather than a change in daylight hours. Its compact size of up to 80 cm can suit balconies, courtyards, small gardens or discreet indoor layouts.

This is an intermediate-level option. Autoflowers generally have limited time to recover from major stress, so steady conditions and gentle plant handling are preferable. Explore more compact options in the autoflower seed collection.

Indoor

Indoors, plants may reach up to 80 cm and have a listed yield potential of up to 400 g/m². Use an airy growing medium and avoid prolonged saturation around the roots. Gentle low-stress training early in vegetative growth may help open the canopy, but heavy pruning can slow a compact auto.

Good air movement is particularly useful as flowers gain density. Stable light, temperature and humidity support even development and help reduce the risk of mould. The listed flowering period is approximately 8–10 weeks, though the full seed-to-harvest cycle may be longer.

Outdoor

For Australian outdoor growing, spring planting falls between September and November. Choose a bright position with free-draining soil and shelter from persistent rain or strong wind. In cooler districts, starting during a settled part of spring may give plants better access to warmth and sunlight.

Outdoor plants may remain around 80 cm and have a listed potential of up to 150 g per plant. These figures are guides rather than guarantees; weather, container size, nutrition, sunlight and phenotype all influence final performance.

Harvest

Australia’s general outdoor harvest season runs from March to May, although autoflower harvest timing depends mainly on planting date and plant maturity. Assess flower development rather than relying only on the calendar. Mature plants may display swollen flowers, stronger citrus-diesel aromas and fading leaf colour. Check dense areas regularly during wet weather and harvest when the plant has reached the preferred level of maturity.