Free Seeds & Gift Every Order
Up to 40% SALE
Worldwide Fast Free Shipping*
High Grade Genetics
Pick and Mix Seeds
16,20€ – 77,50€Price range: 16,20€ through 77,50€
This feminized cross merges the historic Green Haze #19 clone with the legendary A5 Haze male by Nevil Schoenmakers (Northern Lights #5 x Haze A).
Green Haze 19 A5 is a feminized limited edition, available while stocks last!
Fast Shipping
Best Price Guaranteed
Anonymous and Safe
| Weight | N/A |
|---|---|
| Genetic Type | Pure Sativa |
| Harvest Time | 12-14 Weeks |
| Harvest Yield | 400-500g/ m2, 500-600g / m2 |
| Seed Gender | Feminized Seed |
| Seedbank | ACE Seeds |
| Country | Spanish |
| Effect | Creative, Energetic, Euphoric |
| Genetic Family | Haze, Landrace |
| Taste and Smell | Pine / Wood / Balsamic, Spices / Incense / Cheese |
| Quality | Annibale's Choice |
Green Haze 19 A5 Feminized represents one of the most complex and rare agronomic pinnacles in the preservation of elite Dutch sativas. This feminized cross merges the historic Green Haze #19 clone with the legendary A5 Haze male by Nevil Schoenmakers (Northern Lights #5 x Haze A).
The result is an F1 combination of exceptional vegetative vigor, specifically designed for experienced growers and breeders who demand the purity and electric effect of ancient 1970s tropical lineages, but with a significantly enhanced trichome production.
Green Haze 19 A5 is a 100% pure, late-flowering sativa variety, with an indoor maturation cycle requiring between 13 and 16 weeks. It develops long floral spears with an open, geometric structure, covered in a dense, non-sticky resinous secretion.
With THC levels stabilized between 15% and 22% and a relevant presence of CBG, it delivers stable indoor yields ranging between 400 and 500 g/m². The aromatic profile is deep and woody, dominated by sharp notes of incense, fuel, and ancient spices, requiring millimetric control of space and mineral nutrition parameters.
Pedigree records and official logs analyzed on Seedfinder confirm that Green Haze 19 A5 was born with the intent of joining the two most important historic Haze clones in Europe.
The Green Haze #19 mother provides tropical purity and absolute mold resistance, while the A5 Haze father (NL5 x Haze A) introduces structural stability and significantly increases calyx hardness, partially reducing the airy density typical of wild landraces.
“A biological bond that imprisons the 1970s tropical haze inside a feminized genetic code with high resinous secretion.”
In technical analyses shared by cultivation veterans on ICMag, this genetics is described as a true “living fossil” of independent breeding.
The feminized version guarantees excellent consistency in the expression of dominant Haze traits, offering uniform plants that exclude unstable mutations or dwarf phenotypes found in unrefined lines.
In professional grow rooms, managing Green Haze 19 A5 demands geometric planning of space. Its vertical elongation rate during the first 5-6 weeks after the light switch is imposing; the plant can easily quadruple its initial vegetative volume.
To tame this energy, most experienced growers on GrowDiaries logs recommend setting an 11 hours of light and 13 hours of darkness photoperiod from the very first week of bloom.
Horizontal containment net application for canopy management is a mandatory technical requirement. Flexible branches must be woven constantly to favor the development of floral sites under high-intensity LED modules.
The VPD parameter must be maintained between 1.2 and 1.5 kPa. Nutrient absorption is very light: the plant shows high intolerance to salt buildup in the substrate. A maximum electroconductivity (EC) value between 1.1 and 1.3 in full bloom is sufficient to avoid root lockouts.
Outdoors, this genetics expresses its maximum potential only in hot Mediterranean, coastal, or subtropical climates. The root system expands rapidly and requires early inoculation of mycorrhizae and beneficial bacteria to optimize mineral nutrition in superficial soils.
Since maturation extends until mid-December in the northern hemisphere, open-field cultivation is excluded in northern regions, making the use of warm greenhouses or ventilated tunnels mandatory. Resistance to botrytis is absolute, thanks to airy buds that prevent water retention.
The biochemical profile of Green Haze 19 A5 is dominated by a massive concentration of Terpinolene, which gives the buds a sharp, industrial, and resinous smell. Primary notes recall fuel, seasoned sandalwood, and classic church incense.
During the curing process, which requires a minimum of 12 weeks in jars to allow the maturation of complex monoterpenes, floral nuances and dark plant notes of old leather emerge. For extraction technicians, the plant offers a quantitatively moderate but qualitatively elite return in dry sifting.
The resin, with a dry and sandy consistency, detaches easily from the calyxes, delivering concentrates with high aromatic persistence on the palate.
Based on aggregate evaluations provided by users on platforms like Leafly, the action of this pure sativa is characterized by an electric mental stimulation devoid of a maximum tolerance limit (ceiling-less).
The onset is immediate and manifests as a wave of cerebral heat that speeds up thoughts and amplifies visual perception. Given the total absence of CBD and the synergism between THC and CBG, the experience is purely mental and introduces no physical heaviness or muscle lethargy.
It is a variety sought after by old-school sativa lovers for deep creative and introspective activities. It is absolutely not indicated for evening use or before night rest, as its strong cerebral drive can cause prolonged insomnia.
Oldtimer’s Haze is the original wild line, characterized by extremely light, airy flowers and an even more complex management. Green Haze 19 A5 by ACE Seeds introduces the Northern Lights genes of the A5, increasing calyx density and significantly improving final dry weight yield.
Killer A5 Haze contains Malawi genetics, which introduce a devastating power and a physical impact that is significantly heavier and denser. Green Haze 19 A5 maintains a purely sativa profile, much more electric, clear, and oriented toward classic incense without body heaviness.
SSH is a commercial hybrid stabilized for quick cycles (9 weeks) thanks to a strong indica percentage. Green Haze 19 A5 is a radically different technical choice, devoid of artificial sugary notes, dedicated to those looking for a much deeper and more persistent mental experience.
This genetic line is totally discouraged for commercial growers who demand quick 60-day cycles or operate in small spaces with low ceilings. It is unsuitable for novice consumers or individuals prone to anxiety and tachycardia, due to the strength of its cerebral stimulation.
Furthermore, it is not indicated for intense hydroponic setups with very high mineral conductivity, where its root system would be burned in a few days.
Professionals recommend an 11/13 or 10/14 light cycle from the first week of flowering to force maturation and contain vertical development.
It prefers well-defined wetting and subsequent substrate drying cycles; a constantly wet medium blocks the plant’s metabolism.
The plant can quadruple its initial height; it is necessary to calculate the useful space before setting the light switch in the grow room.
Biochemical analyses highlight dominant peaks of Terpinolene, followed by significant fractions of Beta-Myrcene and Limonene.
No, late flowering in December exposes it to lethal frosts; outdoors it is indicated only for the extreme south or under heated greenhouses.
Green Haze 19 A5 by ACE Seeds Genetics is not a variety for everyone, and that is precisely what makes it a technical masterpiece. It represents the essence of botanical preservation: taking the untamed spirit of the old 1970s Haze and stabilizing it into a feminized format with high resinous secretion.
We do not recommend it to those who look only at weight or commercial speed, but to the veteran grower who demands a flower with an old-school incensed terpene profile, capable of delivering a return in extractions and a mental effect that fear no comparison with today’s Cali quality.
A demanding plant, but one that fully rewards every single day of waiting.
Green Haze 19 A5 is a feminized limited edition, available while stocks last.
