How to grow MK Ultra
THC 21% 
Flowering 63 days 
Yield 458 – 549 g/m² 
Height 119.9-140cm Taste
Seb's take
Twenty per cent sativa in an otherwise indica frame, just enough to sharpen the mind-warp without slowing the vigour. Earthy, pungent and pine-sweet on the nose; the effect stays relaxed, sleepy and euphoric, with real uplift threaded through. First place at the HTTC in 2003, and the plant draws admirers before it's even harvested.
Where it comes from
Herbies built this on G13, OG Kush and a third parent kept off the label, running eighty per cent indica. The twenty per cent sativa is there for a reason: it sharpens the mind-warp without compromising the plant's vigour or its super-compact profile. The judges at the HTTC in 2003 gave her first place in the indica category, a result the record wears plainly. A feminized strain that earns admirers before she is even harvested, and a name that leans hard into its own unsettling reputation.
Nose & flavour
Earthy and pungent lead, with pine, sweetness and a woody undertone filling in behind. It is a classic Kush-leaning nose, grounded and resinous, the sweetness threading through the heavier notes rather than sitting on top. There is real depth to it, the sort that lingers. A rich, forest-floor profile with just enough sugar to lift it.
The high
The effect stays relaxed, sleepy and euphoric, with genuine uplift threaded through, the sativa portion doing exactly the mind-warping work the record credits it with. It settles the body while keeping the head interesting, a balance the eighty-twenty split would not lead you to expect. This is company for the evening, though not a dead weight. The name promises something disorienting, and the lift up top delivers a gentler version of the same.
Growing it
She reaches roughly 120 to 140cm, a compact medium the record praises for its vigour, and finishes in 63 days. Yields land at 458 to 549 g/m², with THC noted at 19 to 21% and CBD around one per cent. Everyone falls in love with the plant while she grows, by the record's account, and the finished flower does the rest. A robust, good-looking grow with a competition pedigree behind it. Standard care brings out the jaw-dropping end the breeder is so pleased about.
Learn to grow her properly:
Effects
MK Ultra from other breeders
The same name, several hands. Every breeder’s version below is its own cut — different figures, different temperament, same family. The particulars above describe the lead listing.
- T.H. Seeds feminized Seeds at Herbies →
Promises less on the scales.
- T.H. Seeds regular Seeds at Herbies →
The regular-seed take, lists a lighter harvest.
Common questions about MK Ultra
How long does MK Ultra take to flower?
Around 9 weeks of flowering, by the breeder's numbers.
Is MK Ultra an autoflower or a photoperiod strain?
A feminized photoperiod strain — flowering starts when you switch the lights, so the timing is yours to control.
How tall does MK Ultra grow?
Around 140 cm. Standard tent territory.
How strong is MK Ultra?
The breeder lists THC around 21%. Firmly in the strong band.
