How to grow Black Jack Auto
Seb's take
Black Jack Auto, a third-generation cross of S.A.D. and Jack Herer autos, keeps a mostly sativa build across a compact, resin-packed plant with grape-shaped calyxes. Sweet and pungently earthy on the nose, the high runs happy, euphoric, and creative without demanding much patience, nine weeks from seed to flower. Fast, and forgiving of it.
Growing Black Jack Auto: what to expect
She's an auto — on her own clock from the day she sprouts. No switching lights, no waiting on seasons, and no pausing while you sort problems either; read how autos differ before day one.
She takes a conventional 9 weeks to flower. Conventional is underrated; so is knowing what week you're in.
Expect roughly 110 cm of plant. Manageable, though she'll appreciate a little training if your headroom is tight.
Expect 400 – 550 g/m² — a working grower's yield, reliable rather than theatrical. The harvest guide will see it in safely.
Listed at 19% THC — potent, verifiably. The figure comes from the breeder's testing, not from our enthusiasm.
Sweetness leads on the nose, and she doesn't whisper it.
The dominant note in the reviews is uplifting; daytime company, by most accounts.
Learn to grow her properly:
Common questions about Black Jack Auto
How long does Black Jack Auto take to flower?
Around 9 weeks of flowering, by the breeder's numbers.
Is Black Jack Auto an autoflower or a photoperiod strain?
An autoflower — she flowers on age rather than light hours, which simplifies the schedule considerably.
How tall does Black Jack Auto grow?
Around 110 cm. Standard tent territory.
How strong is Black Jack Auto?
The breeder lists THC around 19%. Firmly in the strong band.