Royal Runtz Auto is an all-rounder that ticks every box: tasty, productive and quick. Royal Queen Seeds created her by crossing its hugely popular photoperiod Royal Runtz with a ruderalis specimen, adding autoflowering genes for a faster turnaround and a more discreet growing cycle.
Her genetic split is 50% sativa, 45% indica and 5% ruderalis. THC tops out at up to 19%, below her 27% parent but still hard-hitting for an autoflower, and the candy-and-fruit flavor that made Royal Runtz famous comes through intact.
Indoors she reaches 2 to 3 feet (60–90 cm) and produces 12 to 16 oz/m² (340–455 g/m²). Outdoors, she grows to 2 to 4 feet (60–120 cm) and yields 2 to 3 oz/plant (55–85 g/plant). From the day you sow her, harvest arrives in roughly 70 to 75 days, or about 10 to 11 weeks.
A little training keeps her low enough to grow in a concealed closet or cupboard, making her a great match for small-space and stealth growers.
Flavor and Effects of Royal Runtz Auto
Every toke is a mouthful of sweet candy and juicy fruit. The aroma is bright and sugary, and the smoke stays smooth and dessert-like right through the exhale.
The effect is energizing and uplifting, washing over body and mind with a cheerful glow that lasts. It feels like a sunny Saturday morning with no plans and a bag of fruit candy in hand: light, upbeat and in no rush to end. She works well for daytime socializing, creative projects or simply enjoying the afternoon.
Growing Royal Runtz Auto Seeds
As an autoflower, Royal Runtz Auto needs no change in light schedule. Run 18/6 or 20/4 from germination to harvest, and she will begin flowering by herself, spending about 50 to 55 days (roughly 7 to 8 weeks) in bloom. Sow straight into the final container and use gentle LST to keep her low and even.
Outdoors, she suits regions with long summers. Thanks to her short life cycle, you can stagger plantings from late spring onward and collect more than one harvest per season.
Royal Runtz Auto Characteristics
| Strain type | Autoflowering (feminized) |
| Genetics | Royal Runtz x Ruderalis |
| Indica/Sativa | 45% Indica / 50% Sativa / 5% Ruderalis |
| THC | Up to 19% |
| CBD | Low |
| Effect | Long-lasting, uplifting |
| Flavor | Candy, fruity |
| Indoor yield | 12 to 16 oz/m² (340–455 g/m²) |
| Outdoor yield | 2 to 3 oz/plant (55–85 g/plant) |
| Seed to harvest | 70–75 days after germination (about 10–11 weeks); flowering 50–55 days |
| Height | Indoor 2 to 3 feet (60–90 cm); outdoor 2 to 4 feet (60–120 cm) |
| Climate | Suits long summers |
| Best cultivation technique | LST, small-space and stealth grows |
FAQ
How is Royal Runtz Auto different from Royal Runtz?
Royal Runtz Auto adds ruderalis genetics, so she flowers automatically and finishes faster. THC reaches up to 19%, compared with up to 27% for the photoperiod version.
How long does Royal Runtz Auto take from seed to harvest?
About 70 to 75 days after germination, or roughly 10 to 11 weeks.
Can I grow Royal Runtz Auto in a closet?
Yes. Indoors she stays at 2 to 3 feet (60–90 cm), and a little training keeps her compact enough for closets and cupboards.
What light schedule does Royal Runtz Auto need?
She flowers on her own, so you can keep the lights at 18/6 or 20/4 for the entire grow.
What are the effects of Royal Runtz Auto?
Expect an uplifting, energizing high that lasts a long time, paired with sweet candy and fruit flavors.
What yield does Royal Runtz Auto produce?
Indoors, 12 to 16 oz/m² (340–455 g/m²). Outdoors, 2 to 3 oz/plant (55–85 g/plant).
Reviews
There are no reviews yet.