STRNG Seeds – Runtz Auto

Runtz Auto is famous for its fast cycle, compact structure, and rich candy-like aroma — all packed into an easy-to-grow autoflower format.

Runtz Auto typically finishes in 9–10 weeks from sprout under optimized indoor conditions.

Expect a sweet blend of tropical fruit, sugary candy, and creamy citrus, especially loud by week 7 of flower.

Yes — it’s resilient, fast-growing, and does well in small spaces without needing complex training.

Flush for 7–10 days using clean water once most pistils have darkened and trichomes turn milky.

Dense, frosty buds with bold colors — often deep green with purple tones and thick orange pistils.

Yes — it performs well outdoors during warm months and finishes fast enough to beat early fall weather.

It starts vigorously, transitions quickly to flower, and stays compact with well-spaced nodes for even bud sites.

Absolutely — its short cycle allows outdoor growers to run two or more harvests in one warm season.

Of course! You can see our equipment collection HERE.

Yes, all our Runtz Auto seeds are in feminized format for consistent flowering plants.

No — Runtz Auto flowers automatically under 18/6 or 20/4 lighting throughout its lifecycle.

They simplify growing by removing the need to sex plants or manage light cycles — just plant and grow.

It’s best to start Runtz Auto in its final container to avoid root stress and maximize growth.

No — use low-stress training (LST) instead, as its limited vegetative window doesn’t favor heavy pruning.

A 3–5 gallon fabric pot is ideal to allow strong root development without overwatering risks.

Keep it between 70–78°F (21–25°C) during the day and no lower than 65°F (18°C) at night.

Water when the top inch of the medium feels dry — avoid overwatering, especially early on.

Use balanced autoflower nutrients, with extra phosphorus and potassium during flowering weeks 4–8.

Yes, but due to its dense buds, it’s best to maintain RH under 50% in late flower to prevent mold.