Cannabis seeds
by Sensi Seeds
Northern Lights 5 x Haze is a regular cannabis seed strain from Sensi Seeds that crosses two legendary genetic lines — the resinous, compact Northern Lights #5 indica with the soaring, cerebral original Haze sativa. The result is a hybrid that leans slightly sativa in effect but grows with indica-like vigour, producing enormous yields of sweet, spicy bud with a minimum 20% THC content. Created over two decades ago, it still holds its own against modern genetics — and that says a lot.
This guide is written for adults aged 18 and over. Northern Lights 5 x Haze seeds are sold as collector's items and for preservation of cannabis genetics.
Northern Lights 5 x Haze from Sensi Seeds comes in a single pack option of 10 regular seeds. Regular means you'll get a natural mix of male and female plants — expect roughly a 50/50 split, so plan for around 5 females per pack. If you're breeding or hunting for a standout mother plant, regular seeds are exactly what you want. If you only want females, you'll need to sex your plants early or consider a feminised alternative.
We've been stocking Sensi Seeds since the early days — they're an Amsterdam institution, operating since 1985 — and Northern Lights 5 x Haze is a strain we still hear about regularly from growers who come back to it after years of chasing newer genetics. The reason is simple: reliability paired with exceptional output.
The yield on this strain is genuinely impressive. Indoors, expect plants that stretch well past 100cm even with minimal vegetative time. That height translates directly into bud sites, and experienced growers report harvests that outperform most modern hybrids. The real trick, though, is cloning. Northern Lights 5 x Haze takes to cloning like it was designed for it — and in a sense, it was. Sensi Seeds reports that mother plants can produce viable clones for over a decade with zero loss in potency. That's not marketing fluff; it's the kind of genetic stability you only get from thoroughly worked breeding lines.
The honest limitation? Flowering time. At 65-70 days, it sits on the longer side compared to pure indica strains that finish in 50-55 days. If you're running a tight schedule or working with a short outdoor season in northern Europe, you'll need to account for those extra two weeks. The trade-off is worth it — but you should know going in.
Northern Lights 5 x Haze grows tall, vigorous, and hungry for light. Here's what you're working with:
| Specification | Detail |
|---|---|
| Seed Bank | Sensi Seeds |
| Seed Type | Regular (non-feminised) |
| Genetics | Northern Lights #5 x Original Haze |
| Type | Sativa/Indica Hybrid |
| THC Content | 20% minimum |
| CBD Content | Low |
| Flowering Time | 65-70 days |
| Indoor Height | 100cm+ (easily exceeds this) |
| Yield | Extremely high |
| Vegetation Period | Can be pushed into flowering almost immediately |
| Cloning | Excellent — mother plants viable 10+ years |
| Seeds per Pack | 10 |
| SKU | CSSE0051 |
One detail that makes Northern Lights 5 x Haze particularly interesting for indoor growers: you can flip to 12/12 after an almost non-existent vegetative period. The plant will still stretch significantly during flower — that's the Haze genetics asserting themselves — so the short veg compensates for the longer flowering window. Net result: your total seed-to-harvest time stays competitive with faster-finishing strains, but your final yield is substantially larger.
Northern Lights 5 x Haze produces dense, resinous buds with a flavour profile that sits right at the intersection of its parent lines. The taste is sweet and spicy — think warm spice with a tropical fruit undertone that comes through on the exhale. The aroma during flowering is pungent; if you're growing indoors without a carbon filter, your neighbours will have opinions.
What makes this strain stand out from other NL crosses is the effect balance. The Northern Lights #5 side brings heavy indica potency — that 20%+ THC floor is no joke — but the Haze genetics prevent it from becoming a pure couch-lock experience. The effect leans uplifting and cerebral, with a slightly altered perception that experienced users describe as mildly psychedelic in character. The indica body component is there, but it doesn't bulldoze the sativa headspace. For a hybrid with this much indica in its lineage, that's unusual and genuinely appreciated.
Compare this to a pure Northern Lights, which tends to be heavier on the body and more sedating. Northern Lights 5 x Haze keeps you functional and engaged — it's a social strain rather than a solo-on-the-sofa strain. If you want something that leans further toward the indica side, Sensi Seeds' standard Northern Lights would be the better pick.
Northern Lights 5 x Haze has a competition pedigree that most modern strains can only dream of. It took 1st prize at the Seed Cup in 1993 and 3rd prize at the Bio Cup in 2002 — wins separated by nearly a decade, which speaks to the strain's lasting quality rather than a flash-in-the-pan hype cycle.
The genetics have also been used as building blocks for countless other strains. If you've grown or enjoyed any Haze hybrid from the past 20 years, there's a decent chance Northern Lights 5 x Haze DNA is somewhere in its family tree. Owning these regular seeds means you have access to that original gene pool — unfiltered, unmodified, and ready for your own breeding projects if that's where your interest lies.
Complete your setup with a proper indoor growing environment. A grow tent like the Dark Box or Secret Jardin paired with an appropriate LED panel gives Northern Lights 5 x Haze the light intensity it craves to hit those massive yields. A carbon filter is non-negotiable for this strain — the flowering aroma is strong. If you're planning to keep a mother plant, pick up some rooting gel and a propagation tray for cloning.
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.
