Cosmic Bomb Auto

Cosmic Bomb Auto Cannabis Seeds by Bomb Seeds

Cosmic Bomb Auto is an autoflowering feminised cannabis seed from Bomb Seeds that delivers photoperiod-level potency in a 65-day seed-to-harvest cycle. A cross between a select LSD cut and Bomb Seeds' own Auto Bomb — an African sativa landrace with ruderalis genetics — this indica/sativa/ruderalis hybrid pushes 16–20% THC and yields up to 600g/m² indoors. If you've written off autoflowers as lightweight, this one will change your mind.

Why Cosmic Bomb Auto Seeds Deserve Your Grow Space

We've seen plenty of autoflowers come through the shop over the years, and most of them are fine — decent yields, moderate potency, quick turnaround. Cosmic Bomb Auto is a different animal entirely. Bomb Seeds crossed a select LSD phenotype with their Auto Bomb, and the result is an autoflower that genuinely competes with photoperiod strains on potency, yield, and flavour. That's not marketing fluff — 16–20% THC from an auto is properly impressive, and some growers have reported pushing beyond that range with dialled-in setups.

The LSD parentage is the secret weapon here. It brings a heady, active, motivated effect that some growers describe as almost psychedelic in character — a surging, cerebral quality you rarely find in autoflowering genetics. This isn't a couch-lock strain. It's a daytime smoke that keeps you moving, thinking, and actually wanting to do things. If you've been disappointed by bland, one-note autos, Cosmic Bomb Auto is the correction.

The honest limitation? She's not small. At up to 140cm indoors, she's taller than most autos and she won't suit a micro tent. If you're working with a 60x60, you'll need to train her aggressively or pick a more compact strain like THC Bomb Auto. But if you've got an 80x80 or larger, she'll fill it beautifully — and reward the extra space with yields that rival many photoperiod plants.

Growing Cosmic Bomb Auto: What to Expect

Cosmic Bomb Auto runs from seed to harvest in 65+ days, which is quick even by autoflower standards. She's not fussy, but she does respond noticeably to good conditions — ample light, generous feeding, and enough room to stretch. Here's what a typical run looks like:

1. Germination (Days 1–5): Standard paper towel method or direct sow into your final pot. She's an auto, so transplanting adds unnecessary stress — start her where she'll finish. A 15–20 litre pot is the sweet spot for indoor grows.
2. Seedling stage (Days 5–15): Keep things gentle. Light feeding, 18/6 or 20/4 light schedule. She'll show her vigour early — expect fast vertical growth from the start.
3. Vegetative growth (Days 15–35): This is where Cosmic Bomb Auto separates herself from typical autos. She can push towards 140cm indoors if left untrained. Low-stress training (LST) during this phase opens up the canopy and exposes more bud sites to light. She takes well to it.
4. Flowering (Days 35–65+): Buds stack on quickly and fatten up impressively in the final weeks. The smell intensifies significantly — sweet and fruity with a skunky sharpness underneath. Make sure airflow is solid around those dense colas to prevent moisture issues.
5. Harvest: Check trichomes with a loupe. Milky with a touch of amber is the sweet spot for that heady, active effect. Expect up to 600g/m² indoors with proper lighting, or up to 200g/plant outdoors in a decent summer.

Flavour and Aroma Profile of Cosmic Bomb Auto

The terpene profile on Cosmic Bomb Auto is one of its genuine standout qualities. When you crack open a cured jar, the first thing that hits you is a sweet, fruity wave — almost candy-like — followed by a deeper skunky undertone that grounds it. Through a vaporiser or clean glass, that sweetness comes through in full, with a sharper, more pungent note on the exhale. It's complex enough to keep you interested and pleasant enough to keep you coming back.

The aroma during the final weeks of flowering is strong. Not subtle, not discreet — properly loud. A carbon filter isn't optional if you're growing indoors and value your privacy. We'd rate the smell intensity at 8 out of 10 compared to other autos we've seen come through.

Cosmic Bomb Auto vs Other Bomb Seeds Autoflowers

Bomb Seeds have built a solid reputation for autoflowers that punch above their weight class. Here's how Cosmic Bomb Auto stacks up against two of their other popular autos:

If you want the biggest yields and the most cerebral effect from the Bomb Seeds auto lineup, Cosmic Bomb Auto is the one. If space is tight, Berry Bomb Auto stays more compact. THC Bomb Auto sits in the middle — solid all-rounder, slightly easier to manage in smaller tents.