Sour Diesel Auto Seeds

Sour Diesel Auto is a feminised autoflower with a 60% sativa and 40% indica profile. The catalogue specifications indicate 15–23% THC and 0.1–0.7% CBD, with an estimated flowering phase of 8–9 weeks. Compact indoors and more expansive under strong outdoor light, it suits growers with some experience managing nutrition, airflow and changing Australian conditions.

Genetics & effects

This cultivar combines Sour Diesel-derived photoperiod genetics with autoflowering ruderalis lineage. Its aromatic profile is led by pungent diesel and sour citrus, followed by lemon, earthy and herbal notes. Limonene, beta-caryophyllene and myrcene are listed among its principal terpenes.

Individual experiences vary, but some people describe the effects as energetic, euphoric or uplifting at first, with happy and relaxed sensations developing later. Setting, personal tolerance and flower composition can all shape the subjective experience.

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

Autoflowering plants begin flowering according to age rather than a change in daylight hours, making steady early growth especially important. Sour Diesel Auto is rated intermediate and is best matched with growers who can monitor watering, nutrition and environmental changes without frequent disruption.

It is listed for hot, dry and temperate climates. In Australia, spring planting falls between September and November. Local conditions vary considerably, so growers should account for heatwaves, coastal humidity, cool nights and intense midday sun. Gradual exposure to strong sunlight can reduce stress on young plants, while good spacing and airflow help reduce the risk of mould.

Indoor

Indoors, plants are expected to reach approximately 60–100 cm. Their moderate size can suit compact rooms or tents, although the sativa influence may still produce noticeable vertical growth. Use gentle canopy shaping early, as autoflowers have limited time to rebound from heavy stress.

• Flowering estimate: 8–9 weeks
• Indoor height: approximately 60–100 cm
• Potential indoor yield: up to 400 g/m²

Stable temperatures, balanced nutrition and regular air exchange support consistent development. Avoid keeping the growing medium constantly saturated, and inspect dense flower sites as they gain weight.

Outdoor

Outdoors, Sour Diesel Auto may reach around 80–160 cm where root space, sunlight and weather are favourable. A sunny position with free-draining soil is preferable. In hot, dry areas, mulch can help moderate soil temperature and moisture loss, while morning watering may limit prolonged overnight humidity around the canopy.

Temperate growers should choose the brightest part of the season and maintain airflow after rain. Containers offer flexibility when plants need shelter from severe weather, but dark pots can heat quickly under summer sun.

• Outdoor height: approximately 80–160 cm
• Potential outdoor yield: up to 170 g per plant

Harvest

For Australian seasonal planning, the main autumn harvest period is March–May. Autoflower timing depends on the sowing date and plant development, so some spring-planted crops may finish outside that window. Check flower maturity directly rather than relying only on a calendar. Yield, height, cannabinoid levels and timing are estimates rather than assured outcomes.

Outback Seed Bank presents Sour Diesel Auto for growers seeking pungent diesel character, bright citrus colour and a manageable autoflower format.