Jack Flash Auto
Growing Jack Flash Auto in New Zealand: a hybrid at 19% THC, creative, energetic, relaxed. Flowering window and height are on the page where we hold them, blank where we do not.
What the seed lot did on the bench
Every lot is checked before it goes on the shelf, and the yield figures come from New Zealand growers who sent us a harvest weight against a batch code. This lot was read on 2026-09-24, from a tray sample of 400.
Outdoor figures come from a New Zealand season, so they run below what the same cultivar reaches somewhere with a longer, drier autumn. Treat them as what this plant does here. The full report for this lot sets out the method and the terpene panel.
About Jack Flash Auto
Will Jack Flash finish outdoors in New Zealand? In most of the country, yes. The outdoor window runs October to April, and an autoflower started in that window runs on age rather than daylight, which takes the guesswork out of timing entirely. Balanced genetics adapt to most of the country, so the honest answer depends on where you are. The regional notes below are the short version.
Questions New Zealand Growers Ask About Jack Flash
What medium suits it? Living soil rewards flavour, coco rewards control and speed. Neither is wrong. Choose the one you will actually maintain.
How much light? More in veg than growers expect, less in late flower than they think. Autoflowers do not need a light-cycle change, so 18 hours throughout is the simple default.
When is it ready? Trichome colour, not the calendar. The published window is 60-70 days, which is a reasonable figure to plan around, but the plant decides.
Is it beginner-friendly? It is rated master. That means it rewards a stable environment and punishes an unstable one β worth a second or third grow rather than a first.
Where do I put it? Indoors it is predictable; the indoor-friendly genetics list covers what performs in a tent. Outdoors, see the regional notes above β or the autoflowering indica range if the season is your constraint.
How does it arrive? Plain, unbranded packaging with tracking β the detail is on the shipping page.
Reading the Effects Honestly
Effect descriptions are the least reliable part of any seed listing, this one included. What is defensible: this is a 60/40 hybrid at 19% THC, commonly described as creative, energetic, relaxed, with caryophyllene leading the terpene profile.
What is not defensible is any promise about how it will feel for you. Dose, tolerance, setting and the phenotype you happen to pop all move the outcome more than the strain name does.
Growing a few and selecting the keeper is the only way to know. That is what a pack of autoflowering seeds is for.
The Terpenes
Caryophyllene leads, myrcene sits behind it, and humulene runs underneath.
Temperature changes what you get. Vaporised low, around 180 to 188 degrees, myrcene and humulene come through cleanly while caryophyllene stays in the background. Combusted, caryophyllene dominates and the finer detail is largely lost. Same flower, two different experiences.
Who It Suits
Jack Flash is rated master. That is not a first-grow recommendation. It responds sharply to environmental precision, which cuts both ways: a stable room is rewarded and an unstable one is punished. Being an autoflower removes light-cycle management entirely, which suits balcony growers and anyone wanting a fast turnaround.
Shipped nationwide in plain packaging. Every strain page carries whatever grow data we could actually source, and nothing we could not.
Published Figures
- Finishes in 60-70 days
- Under lights: up to 450 g/m2
- Grown out: up to 600 g/plant
- Height: Short
- Difficulty: master
Reported Effects
Descriptive, and ordered by how prominently each one appears in the sources we hold. Not a survey, and not a measurement.
Best For
Where It Sits
The Numbers
How it arrives
Regular
Seeds
authenticity
lining
number
Related Strains
Jack Flash Feminised
Jack Flash Feminised, a hybrid listed at 19% THC and described as creative, energetic, relaxed. Posted unbranded and tracked to any New Zealand address, with the grow figures we could trace on the listing.
Kahuna Auto
Sativa genetics for a New Zealand grow. Kahuna Auto carries a listed 20% THC and reads euphoric, creative, calm. Priced in NZD, GST included, delivered nationwide.
Critical Jack Auto
Critical Jack Auto β hybrid, 20% THC on the listing, focused, relaxed, uplifted. Sent in plain packaging with NZ Post tracking and covered by our germination promise.
Jack Herer Auto
Hybrid genetics for a New Zealand grow. Jack Herer Auto carries a listed 18% THC and reads focused, energetic. Priced in NZD, GST included, delivered nationwide.
Where Jack Flash Auto Comes From
Documented parentage is Jack Herer Γ Super Skunk Γ Haze. Where a cultivar's origin is recorded we name it on this page; where it is contested or simply unknown, the field stays empty rather than being filled with something plausible.
We did not originate the cultivars in this catalogue and do not claim to have. What we do is select and stabilise the lines we sell, so that a pack grows out more uniformly than an unworked one β which matters more in New Zealand than in most places, because an outdoor grower here is working to a frost date rather than an open-ended season. The stabilisation programme sets out how that works and what it does not cover.
Every pack is covered by our germination promise: follow the method in the germination guide and seed that fails to open is replaced free within 30 days.