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arjans-ultra-haze-1-green-house - Green House
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arjans-ultra-haze-1-green-house - Green House

Arjan's Ultra Haze 1 Feminized Seeds – Legendary Sativa, High-Yield & Award-Winning Genetics

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Arjan's Ultra Haze 1 feminized seeds from Green House Seed Co. are a legendary sativa powerhouse, born from the iconic Neville's Haze and landrace strains from Cambodia and Laos. This award-winning champion delivers a soaring, cerebral high perfect for daytime creativity, alongside massive yields of up to 1150 g/plant outdoors. Expect a complex flavor profile of citrus, spice, and mint, wrapped in dense, resinous buds. Ideal for experienced growers seeking a true sativa experience with reliable, all-female genetics.
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Arjan's Ultra Haze 1 feminized seeds are your ticket to cultivating a piece of cannabis history, a legendary sativa that delivers a powerful, uplifting high and award-winning yields. This isn't just another Haze; it's a meticulously crafted masterpiece from Green House Seed Co., blending the iconic Neville's Haze with exotic landrace genetics from Cambodia and Laos for a truly unique and potent experience.

Before Growing Arjan's Ultra Haze 1

Ever dreamt of harvesting those classic, soaring sativa effects but got stuck with finicky genetics or disappointing yields? You plant a Haze, pour your heart into it for months, only to end up with a lanky plant that's more stem than flower, or a harvest that doesn't justify the wait. The frustration of a long flowering time with little to show for it can make you question if pure sativas are worth the effort.

That wait feels even longer when your space is limited, or when mould threatens your precious buds in the final weeks. You want that legendary cerebral spark and expansive yield, but without the gamble and the heartache of a failed grow. It's the classic sativa grower's dilemma: high risk for potentially high reward.

Arjan's Ultra Haze 1 is the solution engineered to solve that. It takes the legendary, introspective high of Neville's Haze and supercharges it with the vigour and yield of Southeast Asian landraces. You get the iconic effect you crave, but wrapped in a more manageable, incredibly productive plant that's been proven on the world's biggest stage.

Preparation and Setup

To unlock the full potential of this sativa queen, you need to plan for her stature and flowering time. She's a vigorous, tall plant that loves to stretch.

  • Space & Light: Ensure you have ample vertical height indoors (she can reach over 2 m / 6.56 ft) or a sunny, open spot outdoors. A powerful grow light is non-negotiable for indoor success.
  • Pot & Medium: Start in a small pot and transplant to a final container of at least 15–20 L (3.96–5.28 gal). She thrives in a well-aerated, nutrient-rich soil or coco coir mix. For a perfect start, consider a premium substrate like Pro-Mix or a high-quality compost.
  • Environment: Aim for temperatures between 22–26°C (71.6–78.8°F) during vegetation. Good air circulation is crucial from day one to strengthen stems and prevent issues later.

During the Grow Cycle

Watching Arjan's Ultra Haze 1 develop is a masterclass in sativa growth. Her long branches and generous internodal spacing are a canvas for your training skills.

  • Vegetative Growth: She exhibits strong, vigorous growth. Techniques like Low-Stress Training (LST) or a SCROG net are highly recommended to manage her height, create an even canopy, and maximize light penetration to all budding sites.
  • Flowering Transition: Once you switch the light cycle to 12/12, prepare for a significant stretch, often doubling or tripling in height. Support those long, heavy colas with stakes or a trellis net early on.
  • Feeding: She has a healthy appetite but can be sensitive to overfeeding. Use a balanced nutrient regimen, slightly leaning towards higher Potassium and Phosphorus during flowering. A bloom booster in weeks 5-7 can enhance bud density and resin production. For consistent results, a complete feeding program like the GP3 Starter Kit provides everything she needs.

Harvest, Results, and Post-Harvest

The patience pays off spectacularly around week 11-12 indoors, or early November in the Northern Hemisphere outdoors. You'll be rewarded with long, spiraling colas dripping in resin and covered in fiery orange pistils.

  • The Yield: This is where she shines. Indoors, expect up to 700 g/m² (2.05 oz/ft²). Outdoors in optimal conditions, she can produce a staggering 1150 g/plant (2.54 lb/plant) of top-quality sativa flowers.
  • The Smoke: The wait is worth it for the effect alone: a clean, energetic, and deeply cerebral high that sparks creativity and focus without anxiety. The flavour is a complex symphony of spicy Haze, fresh citrus, and a cooling minty finish.
  • Drying & Curing: Dry slowly in a dark environment at 18–22°C (64.4–71.6°F) and 50–60% RH for 10-14 days. Cure the buds in airtight jars for a minimum of 4 weeks to fully develop her extraordinary aroma and smooth out the smoke.

Short- and Long-Term Advantages and Benefits

  • Award-Winning Genetics: Grow a proven champion, the 1st place winner of the 2006 High Times Cannabis Cup.
  • Massive Sativa Yields: Achieve commercial-level harvests from a single plant, making the long flowering period highly rewarding.
  • Pure, Uplifting Effect: Experience a classic, clear-headed sativa high perfect for daytime activities, creativity, and socializing.
  • Reliable Feminized Seeds: Eliminate the guesswork and ensure every seed develops into a potent, bud-producing female plant.
  • Unique Flavour Profile: Enjoy a rare terpene combination of α-Pinene, β-Caryophyllene, and Geranylacetate for a spicy, citrusy, and minty taste.
  • Ideal for Extraction: Her high resin production makes her a top candidate for producing exceptional hash, rosin, and other concentrates.
  • Builds Grower Skill: Successfully cultivating this sativa will elevate your gardening skills and deepen your understanding of plant training.

Technical Specifications

  • Breeder / Brand: Green House Seed Co.
  • Type: Feminized Photoperiod
  • Genetics: Neville's Haze x Cambodian x Laos
  • Dominance: 80% Sativa / 20% Indica
  • Indoor Flowering: 11 to 12 weeks
  • Outdoor Harvest (N. Hemisphere): Ready by early November
  • Indoor Yield: Up to 700 g/m² (2.05 oz/ft²)
  • Outdoor Yield: Up to 1150 g/plant (2.54 lb/plant)
  • Indoor Height: Tall plant, requires space and training
  • Outdoor Height: Can reach over 2.30 m (7.55 ft)
  • THC: Approximately 21.22%
  • CBD: Approximately 0.19%
  • Difficulty: Medium to High (due to long flowering and height management)
  • Ideal Climate: Equatorial, tropical, subtropical, and temperate climates. Thrives in Mediterranean conditions outdoors.
  • Aromatic Profile: Dominant terpenes: α-Pinene, β-Caryophyllene, Geranylacetate.
  • Flavour: Complex blend of spicy, metallic (from Neville's Haze), fresh citrus, and mint.
  • Effect: Energetic, cerebral, creative, focused. A "creeper" high that is introspective and meditative.

Frequently Asked Questions

How long does Arjan's Ultra Haze #1 take to flower?

Indoors, she requires a long flowering period of 11 to 12 weeks to fully mature. Outdoors in the Northern Hemisphere, she is typically ready for harvest in the first week of November.

Is this strain suitable for beginner growers?

Due to her long flowering time, significant height/stretch, and specific nutrient needs, she is better suited for growers with some experience. Beginners should consider more forgiving strains like many autoflowering seeds to start.

What is the best way to train this plant?

Low-Stress Training (LST) and Screen of Green (SCROG) are highly recommended to control her height, create an even canopy, and maximize yield. Topping can also be performed during the vegetative stage.

How do I maximize the yield of Arjan's Ultra Haze 1?

Provide intense light, ample root space (large pots), consistent feeding without overdoing it, and employ training techniques. Ensuring excellent air circulation and stable environmental conditions throughout the long flowering phase is also critical.

What does "creeper high" mean?

It means the effects come on gradually rather than hitting you immediately. You might feel a mild onset that slowly builds in intensity and clarity over 10-20 minutes, leading to a sustained, cerebral experience.

Personal Experience of Pevgrow's CEO (Alan)

Arjan's Ultra Haze 1 is a strain I always come back to when I want a project that rewards patience with sheer excellence. The first thing you notice is the vigour – she's a beast in veg, stretching for the sky. My key tip from the start is to get her into her final large pot early and don't be shy with the LST. I bend those main stems over almost horizontally to create a wide, multi-cola bush. It's essential to manage that legendary sativa stretch.

During flowering, she's a heavy feeder but hates being overfed. I stick to a balanced base nutrient and introduce a PK booster around week 5, which really pumps up the resin production on those long, foxtailing buds. The smell in the tent is incredible – a sharp, spicy haze with a lemon peel kick that cuts through. You'll definitely need a good carbon filter.

The wait is the real test. Around week 10, you'll be itching to chop, but hold out for those extra 7-14 days. Let those trichomes go mostly milky with a touch of amber for that perfect, clear-headed yet potent effect. The smoke is worth every day of patience: expansive, uplifting, and fantastically creative. It's not a knockout stone; it's a tool for the mind. Just be ready to support those heavy, resin-soaked branches in the final weeks – they will need it. Growing her successfully is a badge of honour for any cultivator.

You may also be interested in:
Haze XXL strain
Haze XXL Auto strain
MK Ultra yield

Type: Type Feminized
Banks: Banks Green House
Genetics: Genetics Neville's Haze x Cambodian x Laos
Phenotype: Phenotype Sativa
Harvest outdoor H.N: Harvest outdoor H.N Early September
Harvest outdoor H.S: Harvest outdoor H.S Early March
Indoor production: Indoor production 700 g/m2
Outdoor production: Outdoor production 1150 gr/plant
Indoor flowering period: Indoor flowering period 13-14 weeks
THC: THC 16.22%
CBD: CBD 0.19%


  • Is the shipping discreet?

    Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.

  • Do you ship worldwide?

    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)
    View all

    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.

  • What payment methods and currencies do you accept?

    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.

  • How long does it take to ship my order?

    In 24/48 hours we will ship your order.

  • Are the seeds guaranteed to germinate?

    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.

  • What if I receive a bad or damaged product?

    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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