Permanent Marker Auto Seeds

Genetics & effects

Permanent Marker Auto is a feminised autoflowering hybrid presented in the Outback Seed Bank catalogue. Its background is described as a Biscotti × Jealousy × Sherbet-derived hybrid crossed with ruderalis, although the exact lineage is uncertain. The profile leans 60% indica and 40% sativa, combining autoflowering growth with potentially high cannabinoid content. Listed THC levels are 24–32%, while CBD is listed at 0–2%; actual plant expression can vary with conditions and phenotype.

Aromas and flavours may include pungent floral notes, sweet candy, soap-like accents and a deeper earthy-spiced edge associated with caryophyllene, limonene and myrcene. Experiences are subjective, but some consumers describe the effect as initially uplifting, creative or euphoric, followed by a strong, relaxed finish. Its intensity may feel especially pronounced to some people.

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 intermediate-level cultivar suits growers who can monitor moisture, airflow and nutrition closely. Its autoflowering cycle means bloom begins according to plant age rather than changing daylight hours. In Australia, spring planting runs from September to November. Hot, dry and temperate settings may support vigorous development, while the short cycle can also suit cooler regions with brief growing seasons.

Use a light, well-aerated medium and avoid unnecessary stress during early growth. Autoflowers have limited time to recover from setbacks. Gentle plant shaping can improve light distribution, but heavy pruning or repeated high-stress work may slow development. Stable watering is preferable to alternating saturated and very dry conditions.

Indoor

Indoors, plants may reach up to 140 cm and are listed to produce up to 400 g/m² under favourable conditions. These figures are reference points rather than assured outcomes. Provide consistent airflow around the canopy and enough vertical clearance for flowering stretch. Moderate feeding is a sensible starting point, with adjustments guided by plant colour and growth rather than a fixed schedule.

• Cycle: approximately 10–11 weeks from germination
• Height: up to 140 cm
• Potential yield: up to 400 g/m²

Outdoor

Outdoors, Permanent Marker Auto may reach up to 160 cm and produce up to 450 g per plant in favourable settings. Choose a position with strong direct sun, good drainage and shelter from damaging wind. In humid or coastal areas, spacing and airflow are important for reducing mould risk. In hot, dry regions, mulch and carefully timed watering can help maintain even root-zone moisture.

Harvest

Australia’s broader outdoor harvest period falls from March to May. Because this is an autoflower, individual plants may finish earlier depending on their sowing date, local climate and 10–11-week cycle; later seasonal runs may align more closely with the March–May window. Assess maturity through flower development, aromatic intensity and trichome appearance rather than relying only on the calendar. Environmental conditions, plant health and phenotype can all influence finishing time, yield, colour and aroma.