AMG - Amnesia Mac Ganja

AMG Cannabis Seeds by Royal Queen Seeds

AMG (Amnesia Mac Ganja) is a feminised sativa-dominant cannabis seed that crosses the legendary Amnesia with Mac Ganja Haze — a genetic pairing so potent it swept four consecutive Cannabis Cups from 2014 through 2017. Created by "the Ganja Man" himself, this 80% sativa delivers 22% THC and a spectacular cerebral high that seasoned smokers chase. Royal Queen Seeds bred her for growers who want award-winning genetics without award-winning difficulty.

AMG Genetics: Why This Sativa Wins Cups

Four Cannabis Cups in a row — 2014, 2015, 2016, and 2017. That's not a fluke; that's dominance. AMG's genetic backbone comes from two heavyweight sativa lines: Amnesia, the Amsterdam coffeeshop staple that defined cerebral highs for a generation, and Mac Ganja Haze, a spicy haze variant refined by the Ganja Man. The resulting cross sits at 80% sativa, 20% indica — enough indica structure to keep the plant manageable, enough sativa fire to send your thoughts into orbit.

The 22% THC is the number that matters here. That's not an inflated marketing figure — it's the level that earned those cups. For context, many popular sativas hover around 15-18%. AMG sits comfortably above that bracket, putting her in the upper tier of potency for photoperiod sativas from Royal Queen Seeds.

Growing AMG Seeds: What to Expect

AMG is one of those rare sativas that doesn't demand expert-level growing skills. She adapts well to both indoor and outdoor environments without throwing tantrums over minor environmental fluctuations. That said, she's not a set-and-forget autoflower — she's a photoperiod feminised strain that rewards growers who pay attention.

Indoor height stays between 80-120cm, which is remarkably compact for an 80% sativa. Outdoors she stretches to 140-200cm — tall enough to fill out nicely, short enough that you won't need a ladder at harvest. If you're growing in a tent, an 80x80cm or larger will handle her comfortably. Consider topping or LST during veg to maximise that 550g/m² indoor potential.

AMG Flowering Time: The One Trade-Off

Here's the honest bit: AMG's flowering time runs 10-11 weeks. That's longer than most indica-dominant strains and a couple of weeks beyond faster sativas. If you're used to chopping at week 8, you'll need patience. But there's a reason she takes her time — those extra weeks let the terpene profile develop fully and the resin production reach its peak. We'd take 11 weeks of waiting over a rushed, underdeveloped harvest any day.

For outdoor growers in northern Europe, this means planning your cycle carefully. She'll want to finish by mid to late October, so make sure your climate cooperates. Southern European growers and indoor cultivators won't have any issues with the timeline.

AMG Flavour and Aroma Profile

Light her up and the first thing that hits you is spice — not subtle, not background, but a proper peppery kick that coats the palate. Underneath that, earthy tones settle in, grounding the smoke with a richness that feels like damp forest floor after rain. Then come the herbal tea notes, almost like dried chamomile and sage steeped together. It's a flavour profile that old-school smokers will recognise immediately. If you came up on classic Amsterdam coffeeshop haze, AMG tastes like coming home.

The aroma follows the same path. During flowering, expect your grow space to fill with herbal, spicy scents that intensify in the final two weeks. A carbon filter isn't optional if discretion matters to you.

AMG Effects: A Cerebral Sativa for Experienced Smokers

AMG was not created for someone rolling their first joint. At 22% THC, the onset is fast and the cerebral intensity is significant. This is a daytime sativa through and through — the kind that fires up creative thinking and keeps your mind racing in the best possible way. The 20% indica genetics provide just enough physical grounding to stop the sativa from becoming overwhelming, but make no mistake: this strain demands respect.

We'd compare her to Amnesia Haze in character, but with noticeably more punch. If you've grown or smoked Royal Queen Seeds' standard Amnesia Haze and wanted something with more bite, AMG is the logical next step. The Ganja Man's Mac Ganja Haze genetics add a layer of intensity that the parent Amnesia alone doesn't quite reach.

AMG vs Other Royal Queen Seeds Sativas

The key difference between AMG and her Royal Queen Seeds siblings is pedigree. Those four consecutive Cannabis Cups weren't won by accident — the Mac Ganja Haze genetics give AMG a competitive edge in flavour complexity and cerebral potency that most sativas in this price bracket simply can't match. Amnesia Haze edges her out slightly on yield, but AMG wins on intensity and terpene depth.

Why AMG Deserves a Spot in Your Garden

We've been stocking Royal Queen Seeds for years, and AMG consistently draws repeat buyers. The reason is simple: she delivers competition-grade results without competition-grade difficulty. You don't need a climate-controlled lab or a PhD in plant science. You need decent soil, good light, and the patience to wait out those 10-11 weeks of flowering.

The yields are solid — 550g/m² indoors and up to 600g per plant outdoors — especially when you factor in the potency. This isn't filler bud. Every gram carries that 22% THC and that distinctive spicy-herbal terpene profile. Gram for gram, you're getting more value from AMG than from higher-yielding strains that test at 15-16% THC.

The honest limitation? She's not a beginner's smoke. If you're growing for someone new to cannabis, point them towards something milder first. But if you're growing for yourself or for experienced friends who appreciate a proper sativa punch, AMG is one of the best feminised seeds in the Royal Queen Seeds catalogue. Four cups don't lie.

How to Grow AMG Feminised Seeds

1. Germinate your AMG seeds using the paper towel method or directly in a starter plug. Maintain temperatures around 22-25°C and keep the medium moist but not waterlogged. Taproots typically emerge within 24-72 hours.
2. Transplant seedlings into their final containers once the first set of true leaves appears. AMG adapts to soil, coco, or hydro — pick whichever medium you're most comfortable with. For soil growers, a light organic mix works well during early veg.
3. Vegetate under 18/6 light for 4-6 weeks. AMG stays compact for a sativa (80-120cm indoors), but topping once at the 4th or 5th node encourages lateral branching and helps maximise that 550g/m² potential.
4. Flip to 12/12 when your canopy has filled out. Mark your calendar: flowering runs 10-11 weeks. Don't rush the chop — those final two weeks are when resin production and terpene development peak.
5. Monitor trichomes with a jeweller's loupe during weeks 9-11. Harvest when trichomes shift from clear to mostly milky with a few amber heads for the full cerebral sativa effect. Dry slowly at 18-20°C and 55-60% humidity for 10-14 days, then cure in glass jars for at least two weeks.

Frequently Asked Questions

Last updated: April 2026