Auto Mass
Cannabis seeds
by Grass-O-Matic
Auto Mass Autoflowering Cannabis Seeds by Grass-O-Matic
Auto Mass is an autoflowering cannabis seed strain from Grass-O-Matic that crosses Lowryder genetics with the legendary Critical Mass — itself a proven Afghani x Skunk #1 hybrid. From seed to harvest in roughly 65 days, she delivers resin-drenched buds without demanding a complicated light schedule or years of growing experience. If you want heavy yields from an autoflower that practically grows itself, this is the one to watch.
What You Get
Auto Mass comes in a single pack of 3 feminised autoflowering seeds. No variant confusion here — one pack, three seeds, and about nine weeks of patience between you and harvest day.
| Specification | Detail |
|---|---|
| Seed Bank | Grass-O-Matic |
| Genetics | Lowryder x Critical Mass (Afghani x Skunk #1) |
| Type | Autoflowering |
| Seed to Harvest | Approximately 65 days (9 weeks) |
| Seeds per Pack | 3 |
| Recommended Setup | ScrOG (Screen of Green) |
| Bud Structure | Resin-covered, centred on main stem |
| Resilience | High — tolerant of varied growing conditions |
| SKU | CSGM0002 |
Running Auto Mass in a ScrOG setup? You will need a decent grow tent to keep the environment dialled in. Pair these seeds with one of our complete grow tent kits — tent, ventilation, and lighting sorted in one go. A pH meter and some quality soil or coco coir round out the essentials.
Why Auto Mass Autoflowering Seeds Deserve a Spot in Your Grow Room
The original Critical Mass earned its name for a reason — yields so heavy the branches risk snapping under their own weight. Grass-O-Matic took those Afghani x Skunk #1 genetics and crossed them with Lowryder to create an autoflowering version that keeps the production but strips away the fuss. You don't need to flip your light cycle to 12/12. You don't need to sex your plants. You just plant, water, and wait about 9 weeks.
What makes Auto Mass stand out from the dozens of autoflowers on the market is the combination of speed and bulk. A lot of autos sacrifice yield for convenience — you get your harvest fast, but it fits in a sandwich bag. Auto Mass pushes out a genuinely impressive amount of resin-coated bud, and the majority of it clusters around the main stem in dense, sticky formations. Pick one up after drying and you can feel the weight. The trichome coverage catches the light like frost on a window — that is the Afghani heritage doing its thing.
The honest limitation? She is not going to win any height contests. Autoflowers bred from Lowryder stock stay compact, and Auto Mass is no exception. If you are dreaming of 2-metre trees, look at a photoperiod strain instead. But if you have limited vertical space — a tent, a cupboard, a balcony corner — that compact stature is actually the selling point. She fits where bigger plants simply cannot.
How Auto Mass Compares to Other Autoflowering Seeds
We carry a range of autoflowering strains, and they each have their strengths. Here is how Auto Mass stacks up against two other popular choices so you can pick the right seed for your setup.
| Feature | Auto Mass (Grass-O-Matic) | Typical Fast Auto | Typical High-THC Auto |
|---|---|---|---|
| Seed to Harvest | ~65 days (9 weeks) | ~56 days (8 weeks) | ~75 days (10-11 weeks) |
| Yield Potential | High for an autoflower | Low to moderate | Moderate to high |
| Resilience | Very high — tolerates mistakes | Moderate | Moderate — needs stable environment |
| Best Setup | ScrOG | SOG (Sea of Green) | Open grow / LST |
| Genetics | Afghani x Skunk #1 x Lowryder | Varies | Varies |
| Grower Skill Level | Beginner friendly | Beginner friendly | Intermediate |
Auto Mass sits in the sweet spot: she finishes nearly as fast as the quickest autos but produces noticeably more bud. We would pick her over a generic fast auto every time if yield matters to you. The only reason to go with a longer-finishing strain is if you are chasing a specific terpene profile or potency number that Auto Mass does not quite hit.
How to Grow Auto Mass Autoflowering Seeds
- Germinate your Auto Mass seeds using the paper towel method or by placing them directly into a moist growing medium. Keep the temperature between 20-25°C. Taproots typically appear within 24-72 hours.
- Plant the germinated seed about 1-2 cm deep in your chosen medium — soil, coco coir, or a hydro setup all work. Auto Mass is not fussy about substrate, but a light, airy mix with good drainage gives the best results.
- Provide 18-20 hours of light per day from seedling stage right through to harvest. Autoflowers do not need a light cycle change, which is half the appeal. A 300-600W LED panel at 40-60 cm distance works well for a small tent.
- Water when the top 2-3 cm of soil feels dry. Overwatering is the number one killer of autoflower seedlings — they are small plants with small root systems in the early weeks. Less is more until she is established.
- Begin light feeding around week 2-3 with a balanced vegetative nutrient at half the recommended strength. Switch to a bloom formula once you see the first pistils forming, usually around week 3-4.
- Set up your ScrOG net at canopy height once the plant reaches about 15-20 cm. Tuck branches under the screen as they grow through. This spreads the canopy, exposes more bud sites to light, and takes advantage of Auto Mass's natural tendency to stack buds along the main stem.
- Monitor humidity — keep it around 50-60% during veg and drop to 40-50% during flowering to prevent mould on those dense, resin-heavy buds.
- Harvest around day 65 from seed, or when 70-80% of the trichomes have turned milky white under a jeweller's loupe. Hang the whole plant or individual branches in a dark, ventilated space at 18-20°C for 7-10 days before trimming and curing in glass jars.
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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.