MAC²
Cannabis seeds
by Pure Instinto
MAC² Auto Seeds by Pure Instinto
MAC² Auto is a feminised autoflowering cannabis seed that packs 25% THC and classic Miracle Alien Cookies genetics into an 8–9 week seed-to-harvest cycle. Bred by Pure Instinto from a MAC x Mac Auto cross, these seeds produce dense, resin-heavy flowers with earthy, zesty, and sweet terpenes — no light schedule fuss, no waiting around.
Why MAC² Auto Seeds Deserve a Spot in Your Grow
Speed is the headline here, but it's not the whole story. MAC² Auto finishes in as little as 8 weeks from germination — that's full cycle, not just flowering. You're looking at dense, crystal-coated buds that smell like someone zested a lemon over damp forest floor, with a sweet undertone that gets richer after a proper cure. Crack a dried nug open and the resin sticks to your fingers. That's 25% THC doing its thing.
The genetics behind this are solid. Miracle Alien Cookies (MAC) has been a cut-only clone favourite for years — earthy, alien, covered in trichomes. Pure Instinto crossed it with a Mac Auto to lock those traits into a rugged autoflowering format. The result is a bushy plant with a thick central cola and productive side branches that don't need training to perform, though a bit of LST won't hurt if you want to open up the canopy.
One honest limitation: autoflowers don't give you the same control as photoperiods. You can't extend veg to recover from early mistakes, and topping needs to happen early (if at all) or you'll lose time the plant can't get back. MAC² Auto is forgiving enough for a first grow, but it rewards growers who have their environment dialled in from day one. Get your soil, pots, and lights sorted before you pop the seed — you've only got 8 weeks to work with.
MAC² Auto Growing Specs and Yield Data
| Specification | Detail |
|---|---|
| Breeder | Pure Instinto |
| Genetics | Miracle Alien Cookies x Mac Auto |
| Type | Feminised Autoflower |
| THC Content | Up to 25% |
| Seed to Harvest | 8–9 weeks |
| Indoor Yield | Up to 500 g/m² |
| Outdoor Yield | Up to 600 g/plant |
| Flowering Onset | Weeks 3–4 (automatic) |
| Plant Structure | Bushy, thick central cola, productive side branches |
| Terpene Profile | Earthy, zesty, sweet |
| Seeds per Pack | 3 |
Those indoor numbers — 500 g/m² — assume a proper setup: decent LED or HPS, good airflow, and consistent feeding. Outdoors, 600 g/plant is the ceiling in a long, warm season with plenty of direct sun. Most growers will land somewhere between 350–500 g/m² indoors, which is still excellent for an auto that finishes this fast.
How to Grow MAC² Auto Seeds
- Germinate your MAC² Auto seeds using the paper towel method or directly in a small pot of moist, light soil. Taproots typically show within 24–72 hours.
- Transplant seedlings into their final container early — 11–15 litre fabric pots work well. Autoflowers don't love being repotted mid-cycle, so skip the intermediate pot stage.
- Run an 18/6 or 20/4 light schedule from start to finish. MAC² Auto doesn't need a light change to trigger flowering — it'll flip on its own around weeks 3–4.
- Keep feeding light during the first 2–3 weeks. Once you see pre-flowers forming, switch to a bloom-focused nutrient schedule and increase gradually.
- Watch the trichomes from week 6 onwards. Mostly cloudy with a few amber heads means peak potency. Harvest the main cola first if the lower branches need another few days.
- Dry in a dark room at 18–20°C with 55–60% humidity for 7–10 days, then cure in glass jars for at least 2 weeks. The terpene profile develops noticeably during the cure — don't rush it.
MAC² Auto vs Other Fast Autoflowers
We get asked a lot how MAC² Auto stacks up against other quick-finishing autos. Here's a straight comparison with two popular alternatives in the same speed bracket.
| Trait | MAC² Auto (Pure Instinto) | Gorilla Cookies Auto | Wedding Cheesecake Auto |
|---|---|---|---|
| Seed to Harvest | 8–9 weeks | 9–10 weeks | 8–9 weeks |
| THC | Up to 25% | Up to 27% | Up to 24% |
| Indoor Yield | Up to 500 g/m² | Up to 600 g/m² | Up to 450 g/m² |
| Flavour | Earthy, zesty, sweet | Cookie dough, diesel | Creamy, sweet, cheese |
| Structure | Bushy, thick central cola | Tall, stretchy | Compact, dense |
MAC² Auto hits a sweet spot: it's faster than most autos in its THC bracket, yields are genuinely competitive, and the terpene profile is distinctive enough to stand out in a jar lineup. If you want something with a bit more stretch and don't mind an extra week, Gorilla Cookies Auto is worth a look. But for a compact, fast, flavour-forward grow — we'd pick MAC² Auto.
Complete your setup: pair MAC² Auto seeds with a propagation kit for reliable germination, and grab a carbon filter if you're growing indoors — the terps on this strain get loud by week 5. A jeweller's loupe makes timing your harvest by trichome colour far more accurate than guessing by calendar.
What MAC² Auto Smells and Tastes Like
The Miracle Alien Cookies lineage comes through clearly in the nose. Fresh off the plant, MAC² Auto smells like damp earth and citrus zest — sharp, almost mineral, with a sweet layer underneath that reminds you of biscuit dough. After 2–3 weeks of curing in jars, the sweetness rounds out and the zesty top notes become more defined. It's not a one-note strain.
The buds themselves are dense and compact, coated in a thick layer of trichomes that gives them a near-white shimmer under light. They're sticky to handle — a grinder is non-negotiable unless you want to spend five minutes picking resin off your fingers. The bag appeal is genuinely impressive for an autoflower. We've seen photoperiod MAC cuts that looked less frosty.
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Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.