MK Ultra Feminised

What Is MK Ultra Feminised?

MK Ultra Feminised brings a genuine Cannabis Cup-winning classic to a full photoperiod grow. T.H.Seeds, the confirmed original breeder, created the strain in Amsterdam from G13 and OG Kush genetics. It then went on to take 1st place in the Indica category at the 2003 High Times Cannabis Cup. A 2nd place finish followed in 2004. This feminised version grows on a standard light cycle, flowering once switched to 12/12.

Several seed banks now sell their own feminised version of this cross. Each works from the same confirmed G13 and OG Kush parentage. So growers get that same fast-hitting euphoria and heavy, sedating body stone that made the original a genuine Amsterdam legend.

What makes this version stand out is how faithfully it carries forward MK Ultra’s reputation for real potency and a genuinely knockout evening effect. As a result, it remains a popular choice for growers after deep relaxation rather than a functional daytime high.

Origins & Genetics of MK Ultra

MK Ultra Feminised comes from a confirmed G13 and OG Kush cross. T.H.Seeds, founded in Amsterdam in 1993, bred and stabilised the strain. Every other source agrees on this same parentage. One source instead adds an unnamed third “Secret” component to the cross. That reads as an embellishment rather than a genuine alternative account, since no other source corroborates it.

Most sources describe a predominantly indica plant. The two sources giving an exact split disagree, though, listing either 80% or 70% indica. THC generally lands between 17% and 21%, with most reports clustering around 18% to 20%.

This cross has earned a strong, award-winning reputation for its fast onset and genuinely heavy, sedating effect. So its core character stays remarkably consistent, even where exact phenotype and yield figures vary a little by source.

MK Ultra Effects, Aroma & Flavour

Users commonly describe a fast-acting euphoric rush that quickly gives way to a deep, sedating body stone. Real couchlock potential also kicks in at higher doses. That combination makes it a genuine option for evening use or a session where you’re not planning to move much afterward.

Meanwhile, the aroma leans earthy and piney, with kush spice and a pungent resinous edge. Subtle sweet or citrus notes also run through most reports.

Our guide to maximising terpenes is a useful companion read if you want to preserve that pine-forward, resinous character through curing.

Growing MK Ultra Seeds

This strain rates as easy to moderate across most sources. Its compact structure also suits tents and SCROG setups particularly well. Since it’s a full photoperiod plant, it needs a switch to a 12/12 light cycle indoors to begin flowering.

Indoors, its sturdy branching and manageable height keep training straightforward for most growers. Our guide to growing cannabis indoors in Australia covers the setup basics if you’re planning an indoor run.

Outdoors, this strain handles a range of climates comfortably, and its resilient build gives it an edge in less-than-ideal conditions too. Our Australian cannabis grow calendar is a useful companion read for timing an outdoor planting correctly.

MK Ultra Flowering Time & Yield

MK Ultra Feminised typically finishes flowering in 8 to 10 weeks from 12/12, with most reports landing around 8 to 9 weeks. Indoors, expect yields of around 400 to 500 g/m² under good conditions.

Outdoors, a healthy plant typically produces around 550g, given reasonable light, space and a full season. One source instead lists a considerably higher 800 to 1000g per plant. That figure, though, sits well above every other source. Treat it as an optimistic outlier rather than a typical result.

Because this strain finishes on a fairly standard photoperiod timeline, it also suits growers happy to commit to one well-timed outdoor season. Our guide to spotting quality weed is a useful companion read once harvest day arrives.

Who MK Ultra Seeds Suit Best

This strain suits growers chasing a genuine, award-winning indica with real Amsterdam history behind it. It also suits users after deep, heavy relaxation rather than a light or functional effect. Specifically, smaller-space growers will appreciate its compact, SCROG-friendly structure.

On the other hand, it’s a less natural fit for anyone after an energising daytime effect or a fast, self-flowering timeline. If you’d prefer a faster, self-flowering timeline instead, with no light-cycle switch to manage, MK Ultra Autoflower is worth a look. For anyone after a full-season grow with genuine, knockout MK Ultra character, though, MK Ultra Feminised is hard to beat.