Dr. Underground cannabis seeds are a Spanish breeder's catalogue of feminised and autoflowering hybrids, bred in Alicante for growers who want heavy yields, fast flowering, and genetics you can actually trust. Azarius stocks 16 Dr. Underground strains — from the cerebral Crystal M.E.T.H. to the 1500g-per-plant Godzilla Glue. Shop the full range below; we've been shipping seeds since 1999.
Buy Dr. Underground Seeds — Breeder Guide
Dr. Underground is a Spanish seedbank that works with original cuts from the likes of Serious Seeds, Paradise Seeds, and Soma — then crosses them into fast-finishing, high-yielding hybrids with genuinely distinctive flavour profiles. If you've been around seed catalogues for a while, you'll recognise the parent strains: AK-47, Sensi Star, White Russian, Ed Rosenthal Super Bud, Chronic, Tahoe OG. Dr. Underground's thing is taking those classics and turning them into something that finishes in 7–9 weeks without losing the punch.
We carry the full feminised lineup plus the autoflowering versions of their two bestsellers. Honest take: if you're new to their catalogue, don't overthink it — grab the Surprise Killer Mix and you'll get four of their signature strains in one pack. Experienced growers tend to head straight for Godzilla Glue or Kong 47.
Dr. Underground Strain Comparison
Choose by what matters most to you — flowering time, yield ceiling, or the type of effect you're after. The table below groups the range by grower profile.
| Strain | Flowering | Indoor Yield | Good for |
|---|---|---|---|
| Crystal M.E.T.H. | 8–10 weeks | 500 g/m² | Sativa fans who want cerebral effect in a workable window |
| Melon Gum | 8–9 weeks | 600–800 g/m² | Flavour chasers who want purple buds and berry-melon terps |
| PainKiller | 7–8 weeks | Up to 600 g/m² | Indica growers wanting fast-finishing, resin-heavy buds |
| King Kong | 7–8 weeks | Up to 900 g/m² | Yield hunters with SCROG experience |
| Kong 47 | 49–56 days | Heavy | Growers who loved AK-47 and want it faster |
| Godzilla Glue | 8–8.5 weeks | Huge (1500g outdoor/plant) | Outdoor growers who want to fill jars, not just sample |
| Soul Star | ~8 weeks | Compact, heavy | Small-space indica growers |
| Dark Cookie | ~8–9 weeks | Compact | Tent growers wanting trainable Cookies genetics |
| American Beauty | 8–9 weeks | 500–900 g/m² | First-time feminised buyers — stable, balanced |
| Black Jesus OG | 8 weeks | Dense, resinous | OG Kush fans who want deep purple phenos |
| Brooklyn Mango | Fast | Up to 1 kg outdoor | Mango-diesel terp hunters |
| Auto King Kong | 8–9 weeks seed-to-harvest | Generous | Beginners wanting King Kong without photoperiod hassle |
| Auto Melon Gum | 60–70 days seed-to-harvest | Solid | Fast-turnaround growers who want flavour |
| Surprise Killer Mix | Varies | Mixed | First-time Dr. Underground buyers (4 strains in 1 pack) |
Who Are Dr. Underground?
Dr. Underground is a collective of Spanish growers based in Alicante who've been working with elite clones since the mid-2000s. Unlike breeders who chase trends, they focus on a small stable of strains and refine them across generations. The result: predictable germination, stable phenos, and hybrids that actually deliver on their parent genetics. Notable cuts in their lineage include the Bilbo Critical Mass (used in Crystal M.E.T.H.), the 2004 Sensi Star (in Soul Star), and a reversed Chronic used to build King Kong.
They don't do mega-catalogues. What you see is what they stand behind. That's rare in Spanish breeding, which is why we've carried them for years.
How to Choose Your Dr. Underground Seeds
New to the breeder? Start with American Beauty or the Surprise Killer Mix. American Beauty is stable, balanced, and forgiving — good for a first feminised grow. The mix gives you four different strains to trial in one run, which is the cheapest way to find out which Dr. Underground genetic suits your space and style.
Intermediate growers should look at Melon Gum for flavour or PainKiller for a fast indica finish. Both have been around long enough to have well-documented grow profiles, and both behave predictably in a standard tent setup.
Experienced growers and yield chasers go for King Kong, Kong 47, or Godzilla Glue. These want training — SCROG, topping, LST — and reward you with numbers that genuinely impress. Godzilla Glue outdoors in a warm climate is the headline-maker: 1500g per plant is not marketing, it's what the genetics do when fed properly.
Short on time or new to growing altogether? Auto King Kong or Auto Melon Gum. Feminised autoflowers, seed-to-harvest in 8–10 weeks, no light schedule changes, no sexing. The yields are smaller than the photoperiod versions but the workflow is much simpler.
When in doubt, order the Surprise Killer Mix. Four strains, one pack, and you'll know within a single grow cycle which Dr. Underground genetic is yours.
Frequently Asked Questions
Are Dr. Underground seeds good?
Yes — they're one of the more consistent Spanish breeders on the market. Germination rates are high, phenos are stable, and they work with verified elite cuts (Sensi Star 2004, original AK-47, Bilbo's Critical Mass). If you've grown any of their strains before, you'll know they deliver what the pack describes.
What are the best Dr. Underground seeds?
Depends what you want. For yield: King Kong or Godzilla Glue. For flavour: Melon Gum or Brooklyn Mango. For fast finish: PainKiller or Kong 47. For beginners: American Beauty or the Auto King Kong. For a first-time buyer wanting to sample the catalogue, the Surprise Killer Mix gives you four strains in one pack.
Do Dr. Underground do autoflowering seeds?
Yes — currently Auto King Kong and Auto Melon Gum. Both are feminised autoflowers derived from their photoperiod bestsellers, ready to harvest in 60–70 days (Melon Gum) or 8–9 weeks (King Kong) from seed. Good option if you want the genetics without managing a 12/12 light cycle.
Where are Dr. Underground seeds from?
Spain — the breeder is based in Alicante and has been working with elite clones since the mid-2000s. Their strain lineage pulls from Serious Seeds, Paradise Seeds, Soma Seeds, and original US cuts like Tahoe OG and Thin Mint Cookies.
How many Dr. Underground strains does Azarius carry?
We stock 16 Dr. Underground strains — the complete feminised lineup including Crystal M.E.T.H., Melon Gum, PainKiller, King Kong, Brooklyn Mango, Godzilla Glue, Soul Star, Kong 47, American Beauty, Black Jesus OG, Dark Cookie, plus the Surprise Killer Mix and both autoflowering versions. Shipping across the EU from Amsterdam.
Germinating seeds for the first time? Pair your Dr. Underground order with a propagation kit and rooting cubes from our grow supplies section — no point buying quality genetics if they dry out on day two.
Last updated: April 2026