Jack FrostStrain, Effects, Genetics, Grow Guide & Where to Buy
Jack Frost earned its place in the modern cannabis canon for a reason , and the genetics live up to the reputation. It is a balanced hybrid (50% indica / 50% sativa) testing at roughly 22% THC, with a flowering window of 55-65 days under a 12/12 photoperiod. Below we walk through what to expect from the high, how the plant grows in a tent or outdoor garden, the parental genetics behind the cultivar, and how to get Jack Frost seeds delivered anywhere in the US.
Jack Frost Quick Stats
THC
22%
Indica
50%
Sativa
50%
Autoflower
No
Flowering
55-65 days
Difficulty
intermediate
Indoor Yield
up to 350 g/m2
Outdoor Yield
up to 450 g/plant
Plant Height
Short
Jack FrostEffects & Experience
Reported effects center on creative, happy, uplifted. Jack Frost pulls toward a balanced state where neither head nor body dominates, a profile that holds up across phenotypes when the seeds are grown to their potential.
Growing Jack Frost
Growing Jack Frost fits indoor tent growers running standard 4x4 setups; the hybrid frame responds well to topping and LST. Jack Frost is photoperiod, which means you control when it flowers by switching from 18/6 (vegetative) to 12/12 (flowering). Most indoor growers veg for 4-6 weeks before the flip. Indoor yields land around up to 350 g/m2 under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce up to 450 g/plant. Expected plant height is Short, with intermediate cultivation difficulty. Practical tips that move the needle: top once at the 4th node to encourage 4-6 even main colas instead of one dominant cola; and maintain canopy airflow with an oscillating fan moving air through the leaves, not just above them, to prevent powdery mildew. The most common challenge growers report is late-flower humidity if your indoor RH climbs above 55% during the final two weeks.
Jack FrostLineage & Genetics
This cultivar is part of the Royal King Seeds curated catalog. Read the description as a general profile rather than a guarantee of your specific pack.
Where to Buy Jack Frost Seeds in the USA
Jack Frost seeds ship from Royal King Seeds from within the United States. Estimated delivery is approximately 5-7 business days; actual timing varies by destination and carrier.
Jack Frost FAQ
Is Jack Frost indica or sativa?+
Jack Frost is a balanced hybrid with a 50% indica / 50% sativa split. The effects lean balanced, neither dominantly head nor body.
How long does Jack Frost take to flower?+
Jack Frost flowers in 55-65 days once you flip to 12/12 light cycle. Outdoor harvest typically lands in late September to mid-October across most US zones.
What is the THC content of Jack Frost?+
Jack Frost tests at approximately 22% THC when grown to its potential. Real-world numbers depend on grow conditions, harvest timing, and curing, well-grown phenotypes can land at the high end of that range, while poorly cured flower tests lower.
Is Jack Frost good for beginner growers?+
Jack Frost is rated intermediate difficulty. Photoperiod genetics give you control over plant size and harvest timing, which means a bit more responsibility for getting the schedule right. Most growers with one harvest behind them handle this strain without difficulty.
Where can I buy Jack Frost seeds in the USA?+
Royal King Seeds ships Jack Frost seeds from within the United States, with estimated delivery in approximately 5-7 business days. The product page is at https://royalkingseeds.us/jack-frost-feminized.