Black IceStrain, Effects, Genetics, Grow Guide & Where to Buy
Black Ice is one of the most-searched cannabis strains in the United States, but the data behind the hype is what holds growers' attention. It is a indica-dominant (82% indica / 18% sativa) testing at roughly 22% THC, with a flowering window of 55-65 days under a 12/12 photoperiod. This guide pulls together the lineage, the effects, the grow data, and the practical answer to "where can I buy Black Ice seeds in the USA" in one place.
Black Ice Quick Stats
THC
22%
Indica
82%
Sativa
18%
Autoflower
No
Flowering
55-65 days
Difficulty
intermediate
Indoor Yield
up to 400 g/m2
Outdoor Yield
up to 400 g/plant
Plant Height
Short
Black IceEffects & Experience
The dominant effects of Black Ice are relaxed, sleepy, happy, and the experience is more nuanced than a simple high/low/sedating label would suggest. Onset is gradual rather than abrupt, the peak holds for roughly an hour, and the comedown is smooth, which is why this strain shows up in so many "daily driver" lists from experienced consumers.
Growing Black Ice
Growing Black Ice fits shorter outdoor seasons, Pacific Northwest, New England, Great Lakes, where 7-9 week flowering finishes ahead of October rains. Black Ice 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 400 g/m2 under quality LED, and outdoor plants given full sun and 5-7 gallon containers reliably produce up to 400 g/plant. Expected plant height is Short, with intermediate cultivation difficulty. Practical tips that move the needle: maintain canopy airflow with an oscillating fan moving air through the leaves, not just above them, to prevent powdery mildew; and defoliate strategically on day 21 of flower; remove fan leaves blocking interior bud sites without stripping the plant. The most common challenge growers report is calcium and magnesium supplementation under bright LED lighting; cal-mag at 2-3 mL/gal from week 2 prevents the most common deficiency.
Black IceLineage & Genetics
Black Ice is offered in the Royal King Seeds catalog. Read the description on this page as a general profile rather than a guarantee of your specific pack; expect some phenotype variation between packs.
Where to Buy Black Ice Seeds in the USA
Black Ice 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.
Black Ice FAQ
Is Black Ice indica or sativa?+
Black Ice is a indica-dominant with a 82% indica / 18% sativa split. The effects lean toward physical relaxation and a calm, settled headspace.
How long does Black Ice take to flower?+
Black Ice 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 Black Ice?+
Black Ice 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 Black Ice good for beginner growers?+
Black Ice 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 Black Ice seeds in the USA?+
Royal King Seeds ships Black Ice seeds from within the United States, with estimated delivery in approximately 5-7 business days. The product page is at https://royalkingseeds.us/black-ice-feminized.