Watermelon Automatic – Royal Queen Seeds

Craving a sweet, summery flavour from your own grow? Watermelon Automatic – Royal Queen Seeds combines a ripe watermelon aroma with a reported THC level up to 20% and a short cycle of roughly eight to nine weeks. It’s a straightforward autoflower that rewards growers with chunky, resinous buds.

About Watermelon Automatic – Royal Queen Seeds

These autoflower seeds carry a genetic profile of roughly 20% sativa, 75% indica and 5% ruderalis, with a reported THC content up to 20% and medium CBD. Watermelon Automatic crosses Watermelon with OG Kush Auto, producing indica-dominant plants with dense, frosty flowers. The flavour is fresh and fruity, reminiscent of ripe watermelon. Reported effects are described as calming and relaxed, though results differ from person to person.

Key characteristics

• Juicy flavour: sweet, fresh watermelon with fruity undertones.
• Generous indoor yield: around 450–500 g/m² under suitable conditions.
• Fast cycle: ready roughly 55–65 days after germination.
• Balanced profile: up to 20% THC with medium CBD.
• Highly rated: one of the better-reviewed autoflowers among RQS growers.

Grow data at a glance

• Strain type: Autoflowering
• Genetics: Watermelon x OG Kush Auto
• Genetic profile: 20% sativa, 75% indica, 5% ruderalis
• THC: up to 20% · CBD: medium
• Flowering time: 45–50 days
• Seed to harvest: 55–65 days after germination
• Height: 80–110 cm indoors, 100–120 cm outdoors
• Indoor yield: 450–500 g/m²
• Outdoor yield: 50–90 g/plant
• Flavour: fruity and watermelon
• Climate: long summers

Prefer a different flavour direction? Compare the fruity notes of Purple Lemonade Automatic – Royal Queen Seeds or the dessert-style Cookies Gelato Automatic – Royal Queen Seeds. You can also browse our full range of Autoflower Seeds.

Frequently asked questions

Does Watermelon Automatic perform better indoors or outdoors?

Indoors it reaches around 450–500 g/m², while outdoor plants stay smaller at roughly 50–90 g each. Both settings are workable, depending on your space and climate.

Are these seeds suitable for beginners?

The autoflowering nature means flowering begins without a change in light schedule, and the full cycle runs about 8–9 weeks from germination. Indoors the plant can grow fairly tall, so light low-stress training helps keep the canopy even.

What is the expected yield?

Indoor yields are reported at around 450–500 g/m², with outdoor plants producing approximately 50–90 g each, depending on growing conditions.

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