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Jack Hair Auto by Bulk Seed Bank is a lightning-fast, Sativa-dominant autoflowering seed that delivers the legendary uplifting energy of its namesake in just 7 to 8 weeks, giving you a massive, stress-free harvest.
Finding a strain that perfectly adapts to your mood is a constant struggle; some genetics lock you to the couch when you want to socialize, while others make your mind race when you just want to chill alone, limiting how and when you can truly enjoy your stash.
This creates frustrating situations where you either end up feeling disconnected from your friends during a session, or you find yourself overthinking in your room when you just wanted a peaceful solo escape, leaving you with a mismatched, underwhelming experience.
Jack Hair Auto solves this dilemma by offering a beautifully balanced, cheerful Sativa effect that adapts to your environment, providing an uplifting spark for group hangouts and a focused, creative joy when you are flying solo.
When you light up this strain by yourself, it acts as an instant mood elevator. The mental clarity it provides sweeps away the daily fog, replacing it with a bright, functional energy that makes solo hobbies, creative projects, or simply listening to music feel incredibly engaging.
Instead of overwhelming you, the Sativa dominance keeps you focused and comfortable in your own space. You get to fully appreciate the complex terpene profile—savoring the tropical fruits and spicy Haze notes—while enjoying a sense of inner peace and motivation.
Bring this to a Saturday night gathering, and watch the dynamic shift. It is the ultimate icebreaker, sparking spontaneous conversations, uncontrollable giggles, and a shared sense of euphoria that connects everyone in the room.
Because the effect is cheerful and mental rather than physically heavy, nobody ends up glued to the sofa. It keeps the energy flowing naturally, making it the perfect companion for parties, outdoor adventures, or deep late-night chats with your best friends.
To get the most out of this versatile autoflower, it helps to match your consumption method and setting to the experience you are looking for.
Quick overview: Sativa auto by Bulk Seed Bank · 7-8 weeks cycle · Ideal for fast indoor setups or sunny outdoor summers.
Safe start: Germinate and plant directly into a 20 L (5.28 gal) final pot to avoid transplant shock. To ensure explosive root development from day one, use Rootbastic Atami.
Directed growth: Keep a constant 18/6 or 20/4 light cycle indoors. The plant stays compact, reaching up to 1 m (3.28 ft), so avoid aggressive pruning.
Efficient flowering: Maintain humidity below 80% to prevent fungal issues in its dense buds. For an extra push in bud weight and resin production, Monster Bloom Grotek works wonders.
Harvest and refinement: Flush the roots 10 days before cutting to enhance the tropical Haze flavor. Dry slowly at 20 °C (68 °F) and 50% RH.
Indoors, it can produce an impressive 700 g/m² (2.29 oz/ft²) under optimal conditions. Outdoors, expect between 40 and 100 g/plant (1.41 and 3.53 oz/plant) depending on the hours of direct sunlight.
Not at all. It is a very resilient and fast-growing strain that requires minimal maintenance, making it perfect for novice growers looking for top-tier Sativa results.
Thanks to its uplifting and mental effect, it is ideal for daytime use, creative afternoon sessions, or lively weekend nights with friends. It will not leave you feeling sluggish.
It maintains a very manageable size, peaking at around 1 m (3.28 ft) both indoors and outdoors, which makes it highly discreet and easy to fit in standard grow tents.
I always keep a jar of Jack Hair Auto around for when I need a reliable mood boost. When I am working on a solo project or just need to clear my head, a quick vape session gives me that classic Jack Herer clarity without the anxiety. It is my go-to for staying productive and cheerful.
But where it really shines for me is during weekend barbecues. I will roll a couple of joints to share, and within minutes, the whole group is laughing and engaged. Growing it is a breeze, too; I usually run it in a 20 L (5.28 gal) pot on my sunny terrace, and it never fails to deliver dense, tropical-smelling buds in record time.
| Type: | Autoflowering | |
| Banks: | Bulk Seed Bank | |
| Genetics: | Jack Hair x Ruderalis | |
| Phenotype: | 50% sativa / 30% Indica / 20% Ruderalis hybrid | |
| Indoor production: | 24,7 oz per 3x3ft | |
| Outdoor production: | 1,41-3,5 oz per plant | |
| Outdoor height: | 1,31-3,28 ft. | |
| Crop cycle since germination: | 9-10 weeks | |
| THC: | 18% | |
| CBD: | 0.7% |
Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.
Yes, we ship to almost every country in the world although you need to know the current legislation in your country to make sure that you do not break any regulations with the germination of the seeds.
UK: 3-4 days (express)
USA: 4-5 days (express)
Australia: 4-5 days (express)
Japan: 4-5 days (express)
Canada: 4-5 days (express)
South Africa: 4-5 days (express)
New Zealand: 5-7 days (express)
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The customer must be informed about the laws of their country regarding seeds or other products that may be
purchased on our website, the possession of which may constitute a criminal offence in the country of
receipt.
We cannot be made responsible for the wrong use that some people decide to give to the seeds, so please don't act against your national laws.
Due to problems with customs you can check here for restrictions to certain countries.
We accept the following payment methods: Bank transfer, Cryptocurrencies, cash, credit and debit cards and cash on delivery (Spain, Belgium, France, Italy, Portugal).
You can change the currency on the top right to know the price of the products in your local currency and of course pay this way.
In 24/48 hours we will ship your order.
If you live in a country where the cultivation of cannabis is legal and you decide to plant the seeds, it is good that you know that all the seeds that we commercialize have germination guarantee.
If you germinate with the method of paper napkins and you have followed all the steps that we indicate here, you will only have to return us the seeds not germinated in their original packaging and when we receive them we will proceed to the change.
Then we take care of requesting the return to the seed bank, we do not transfer this responsibility and time to our customers.
If you receive a broken product due to transport, you have to notify us within 24 hours for insurance coverage, always contact us as soon as possible and we will fix the problem!
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