ChloroFileBlack Jack Auto
Sativa variety from Nirvana, flowering in 8-12 wks. Reference data for planning a grow, not a measurement of your plant.
2 breeders sell Black Jack
Nirvana is one of them. Photoperiod versions finish anywhere from week 8 to week 12. Compare every version side by side.
How it grows
| Grown | Indoor, Outdoor, Greenhouse |
What growers describe
Reported by catalogs and growers, not measured from a plant.
Aromas
- Earthy
- Piney
Schedule and VPD targets
Vapour pressure deficit targets by stage, measured from leaf temperature rather than air temperature. The same bands ChloroFile charts against.
| Stage | When | VPD target |
|---|---|---|
| Seedling | Weeks 1-2 | 0.4 - 0.8 kPa |
| Vegetative | Until you flip | 0.8 - 1.2 kPa |
| Early flower | Flower weeks 1-3 | 1.0 - 1.5 kPa |
| Late flower | Flower weeks 4-12 | 1.2 - 1.6 kPa |
Counting from the flip, expect to harvest between week 8 and week 12.
Where to look next
Grouped by how each one is related to this variety rather than ranked into a single list, because those are different questions.
Similar, finishes sooner
Close on type and character, with a shorter flowering window.
- Blue Dream AutoDouble Seeds · similar flavour, same type
- Trainwreck AutoRoyal Queen Seeds · similar flavour, same type
- Auto StardawgBlackskull Seeds · similar flavour, same type
- Black Apple Fritter AutoTastebudz Genetics · same type, similar flavour
If you liked this
No shared parentage, but they line up on type, flowering time and reported character.
- Kushhead 707Emerald Triangle Seeds · similar flavour, similar flowering time
- Australian Dead HeadConnoisseur Genetics · similar flavour, similar flowering time
- Don OG KushDon Avalanche Seeds · similar flavour, similar flowering time
- 710 OG710 Genetics · similar flavour, similar flowering time
Track one of these
ChloroFile carries this whole reference offline. Pick a variety when you add a plant and it fills in the type, seed type, and flowering window, then logs what actually happened against it.