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MAC Dawg XXL Auto by Silent Seeds redefines what’s possible in autoflowering cannabis—delivering photoperiod-level potency, structure, and resin production with the speed and simplicity of an auto. This is next-gen growing, simplified.
Most autoflowering strains promise big but deliver small: weak flavors, low yields, and plants that collapse under their own weight. You end up with bland buds, wasted time, and the same old routine—germinate, wait, trim, repeat—without real excitement or results.
Imagine watching your plants stretch weakly, fail to branch, or rot from mold because they can’t handle real conditions. You’re stuck choosing between speed and quality. And when harvest finally comes, the flavor’s flat, the high is forgettable, and you wonder if it was worth it. That’s the old standard—and it’s holding you back.
MAC Dawg XXL Auto changes everything. Born from Chemdawg Bx1 × MAC Auto, it grows fast but builds like a champion: thick stems, tight internodes, and a bushy structure that supports massive, trichome-drenched colas. Indoors, it yields up to 650 g/m² (2.2 oz/ft²); outdoors, over 400 g/plant (14 oz). With THC up to 29%, the effect is deep, physical, and long-lasting—perfect for unwinding after a long day. The flavor? A punchy mix of diesel, kush, pine, and lemon that lingers on the palate. This isn’t just another auto—it’s a statement.
From day one, this plant commands attention. It grows fast and uniform, filling your tent or garden with a dense, bushy presence. No more spindly stems or empty lower branches. The structure supports heavy flowering sites without staking, and the compact size—up to 1.40 m (4.59 ft)—makes it ideal for stealth grows. Whether you're in soil or hydro, indoors or outdoors, MAC Dawg XXL Auto turns chaos into control, delivering elite results without elite effort.
Quick overview: feminized autoflower · Silent Seeds · 58–63-day cycle · medium difficulty · ideal for indoor tents or outdoor gardens in temperate climates.
Safe start: Germinate seeds at 22–25 °C with high humidity. Transplant once the taproot is ~1 cm long. For faster rooting, Clon Fix strengthens early root development.
Stable seedling: Use a light, airy substrate. Water lightly and avoid overfeeding. Apply beneficial microbes like Mykos Root Paks to boost nutrient uptake and resilience.
Directed growth: Maintain 18–20 hours of light. Use LST to open the canopy and improve light penetration. Keep temperatures at 22–26 °C and RH at 50–60%.
Efficient flowering: Reduce RH to 40–50% to prevent mold. Support heavy colas with soft ties. Apply bloom boosters like Bloom Stimulator FloraMax Green Hope during peak flowering for denser buds.
Harvest and refinement: Harvest when trichomes are mostly milky with some amber. Flush 7–10 days before cutting. Dry at 18–22 °C and 50–60% RH, then cure for 2–4 weeks to enhance flavor and smoothness.
Indoors, expect 550–650 g/m² (1.8–2.2 oz/ft²). Outdoors, plants can produce 100–400 g (3.5–14 oz), depending on conditions.
Use a final pot of 18–27 L (6.3–7.1 gal) to avoid transplanting and support maximum growth.
Yes, its ruderalis heritage gives it good cold tolerance. Just ensure it gets plenty of sunlight and protect it from heavy rain to avoid mold.
It’s a heavy feeder but responds best to a balanced, progressive feeding schedule. Avoid over-fertilizing, especially in early stages.
Yes, its stability and resistance make it beginner-friendly, though it rewards experienced growers with top-tier results.
I grew MAC Dawg XXL Auto in my 120x120x200 cm tent with a 600W LED. From day one, it stood out—vigor you don’t usually see in autos. I used LST at week 2 to spread the canopy, and by flowering, it filled the space evenly. I fed it with a mineral base and added Bloom Stimulator FloraMax Green Hope at peak bloom. The smell was insane—diesel and lemon—so I ran a carbon filter. At day 61, I harvested 620 g of dense, frosty buds. The high is heavy and lasting, perfect for crashing after work. My pro tip? Don’t top it—just train gently with LST. This one’s a keeper.
| Type: | Autoflowering | |
| Banks: | Silent Seeds | |
| Genetics: | MAC (Miracle Alien Cookies) x Chemdawg Auto | |
| Phenotype: | 65% Indica / 35% Sativa | |
| Harvest outdoor H.N: | Up to 180 g/plant | |
| Indoor production: | Up to 550 g/m² | |
| Indoor flowering period: | 10 weeks | |
| Features: | High THC Resistant Tasty |
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| THC: | Up to 27% | |
| CBD: | Not specified | |
| Flavor and aroma: | Citrus Creamy Diesel Earthy (earth) Spicy |
Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.
Yes, we ship to almost every country in the world although you need to know the current legislation in your country to make sure that you do not break any regulations with the germination of the seeds.
UK: 3-4 days (express)
USA: 4-5 days (express)
Australia: 4-5 days (express)
Japan: 4-5 days (express)
Canada: 4-5 days (express)
South Africa: 4-5 days (express)
New Zealand: 5-7 days (express)
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The customer must be informed about the laws of their country regarding seeds or other products that may be purchased on our website, the possession of which may constitute a criminal offence in the country of receipt.
We cannot be made responsible for the wrong use that some people decide to give to the seeds, so please don't act against your national laws.
Due to problems with customs you can check here for restrictions to certain countries.
We accept the following payment methods: Bank transfer, Cryptocurrencies, cash, credit and debit cards and cash on delivery (Spain, Belgium, France, Italy, Portugal).
You can change the currency on the top right to know the price of the products in your local currency and of course pay this way.
In 24/48 hours we will ship your order.
If you live in a country where the cultivation of cannabis is legal and you decide to plant the seeds, it is good that you know that all the seeds that we commercialize have germination guarantee.
If you germinate with the method of paper napkins and you have followed all the steps that we indicate here, you will only have to return us the seeds not germinated in their original packaging and when we receive them we will proceed to the change.
Then we take care of requesting the return to the seed bank, we do not transfer this responsibility and time to our customers.
If you receive a broken product due to transport, you have to notify us within 24 hours for insurance coverage, always contact us as soon as possible and we will fix the problem!
Among all those who comment or send us your questions, there will be a monthly raffle for a €50 voucher for your purchases at Pevgrow. What are you waiting for? Write us and participate!
"The flavor and effects of this strain are incredible. I will definitely buy it again!"