Watermelon Feminized – Royal Queen Seeds

Sweet, fruity and firmly indica-dominant, Watermelon Feminized by Royal Queen Seeds brings a fresh watermelon aroma together with up to 22% THC and a short 50–55 day flowering time. For growers who want chunky, resinous buds without a long wait, this is a rewarding photoperiod strain.

About Watermelon Feminized

Watermelon Feminized stems from Watermelon OG S1 genetics, giving it a profile of roughly 20% sativa and 80% indica with low CBD. The plants develop dense, resin-coated flowers and a distinctly fruity, watermelon-forward flavour. Reported effects are calming and physically relaxing, which makes this an evening-oriented variety, though individual results differ from person to person.

Key characteristics

• Fruity flavour: a fresh, sweet watermelon profile that stays true from flower to finish.
• Fast flowering: ready in around 50–55 days, a quick turnaround for a photoperiod strain.
• Indica-dominant: 80% indica genetics for compact, heavy flower structure.
• Feminized seeds: practically every plant develops as female, simplifying garden planning.
• Solid yields: roughly 450–500 g/m² indoors and 450–500 g per outdoor plant under good conditions.

Grow data at a glance

• Strain type: Feminized (photoperiod)
• Genetics: Watermelon OG S1
• Genetic profile: 20% sativa, 80% indica
• THC: up to 22% · CBD: low
• Flowering time: 50–55 days
• Outdoor harvest: October
• Height: 80–130 cm indoors, 150–200 cm outdoors
• Yield: 450–500 g/m² indoors, 450–500 g/plant outdoors
• Climate: suited to shorter summers

Prefer a different flavour direction? Compare it with the sweet, resinous Royal Cookies Feminized – Royal Queen Seeds or the colourful Purple Queen Feminized – Royal Queen Seeds, or browse our full range of Feminized Seeds.

Frequently asked questions

How fast does Watermelon Feminized flower?

It needs only around 50–55 days of flowering, which is quick for a photoperiod strain.

Are these seeds suitable for beginners?

Indoors, flowering begins when the light schedule switches to 12/12 and runs about 50–55 days, while outdoor plants follow the natural season and are usually ready in October. Because the seeds are feminized, practically every plant develops as female. Indoors the plant can grow fairly tall, so training techniques such as topping or low-stress training help keep the canopy even.

What is the expected yield?

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

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