How to grow Critical Jack
THC 21% 
Flowering 60 days 
Yield 625 g/m² 
Height 300cm Taste
Seb's take
Critical + crossed with Jack Herer, pairing Dinafem's own powerhouse with one of cannabis's most decorated names. Citrus, lemon and orange on the nose, sweet and piney beneath; the high is uplifted and euphoric, relaxed and focused in equal measure. A powerhouse strain that doesn't need much of an introduction.
Where it comes from
Dinafem crossed their own Critical + with Jack Herer, pairing a proven powerhouse with one of the most decorated names in cannabis. It is one of the most popular strains in the whole Critical family, and the parentage explains why — Critical's yield and reliability married to Jack Herer's celebrated character. A photoperiod feminized plant carrying two strong reputations at once.
Nose & flavour
Citrus leads, with lemon and orange sharpening it and a sweet, piney base beneath. A bright, zesty nose that leans toward the Jack Herer side of the family — clean and lively rather than heavy. The sort of aroma that reads fresh and cheerful the moment the jar opens.
The high
Uplifted and euphoric, relaxed and focused in equal measure — a well-balanced high that lifts without scattering and settles without sinking. She keeps the mind clear and engaged while easing the body, which is the balance the two parents were chosen to strike. Bright, capable company.
Growing it
She flowers in around 60 days and grows tall — up to some 300cm — so give her the headroom that height plainly demands, or train her down early. The yield is a heavy 625 g/m². A big, quick, generous plant carrying the Jack Herer stretch and the Critical volume together. Manage the height and she pays it back handsomely. Not a plant for a low tent, but a rewarding one for a tall room.
Learn to grow her properly:
Effects
Common questions about Critical Jack
How long does Critical Jack take to flower?
Around 9 weeks of flowering, by the breeder's numbers.
Is Critical Jack 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 Critical Jack grow?
Around 300 cm. Plan your headroom before she plans it for you.
How strong is Critical Jack?
The breeder lists THC around 21%. Firmly in the strong band.
