How to Grow Northern Lights

Northern Lights is one of the most famous strains in cannabis history, a 90% indica-dominant feminized strain built on a pure Afghani x Thai cross. It carries a THC level of 17%, placing it in the medium range, and delivers a focused, happy and relaxed effect over an earthy, pine and sweet flavor. This guide takes you through the whole grow, from germinating the seeds to the final cure.

It grows tall at up to 6.56 ft, finishes flowering in 8 to 10 weeks, and rewards you with a high yield both indoors and out. Its hardy, forgiving genetics are a big part of why it has stayed a grower favorite for decades, and why it is a great choice for first-time growers.

Recommended Strains

Northern Lights

	THC	17% (Medium)
	Type	Feminized
	Yield	High
	Phenotype	90% Indica / 10% Sativa

1 Seed - $17.503 Seeds - $426 Seeds - $659 Seeds - $8025 Seeds - $19550 Seeds - $320100 Seeds - $580 Add to cart

Northern Lights Autoflower

	THC	10% - 14% (Low)
	Type	Autoflowering
	Yield	High
	Phenotype	80% Indica / 20% Sativa

1 Seed - $17.503 Seeds - $426 Seeds - $659 Seeds - $8025 Seeds - $19550 Seeds - $320100 Seeds - $580 Add to cart

Northern Lights at a Glance

Before you plant anything, it helps to see the full picture in one place. Here is the quick profile for this legendary indica-dominant feminized strain, taken straight from the strain’s grow data.

These are feminized seeds, so every plant flowers female and you skip culling males. Its 90% indica lean places it firmly among the indica seeds, and its heavy returns both indoors and out earn it a spot with the high-yielding seeds. If you are still deciding, the find your strain tool can help you compare it with the rest of the catalog.

How to Germinate Northern Lights Seeds

A heavy harvest starts at germination. The paper towel method is hard to beat: fold the Northern Lights seeds inside two damp sheets, slide them between two plates, and keep them somewhere dark at 70 to 79°F. A taproot usually appears in two to five days.

Once the taproot is a few millimeters long, move each seed root-down about 1 cm deep into a small pot of light, airy medium. Keep it lightly moist rather than soaked, hold humidity around 65 to 70%, and give soft light while the first true leaves open. Its legendary Afghani vigor makes for a strong, dependable seedling.

Starter tips

• Use plain, lightly pH-balanced water (pH 5.5 to 6.5) for the first week.
• Keep seedlings warm and humid, but never waterlogged.
• Hold off on nutrients until the second set of serrated leaves appears.

Growing Northern Lights in the Vegetative Stage

Northern Lights likes a dry climate and, despite being 90% indica, its Thai heritage gives it real height, growing into a tall, well-branched plant that can reach 2 m. Keep it on 18 hours of light a day, aim for day temperatures of 68 to 79°F, and hold humidity around 50 to 60%. It is hardy and forgiving, but plan your space for its size.

This is the stage to take control of its height. Topping early and using low-stress training to bend the main stem keeps the canopy even and manageable, which matters for such a tall plant, and it spreads the light to lift that high yield. Give it room so air moves freely through the structure.

Its tall, hardy build and October finish make it a strong outdoor plant, especially where the air stays dry:

• Dry, warm regions (California, the Southwest): ideal, since its dry-climate preference and 8 to 10 week bloom ripen cleanly through October.
• Pacific Northwest and cooler states: its hardy Afghani genetics handle cool nights, but watch autumn damp on the dense, resinous buds.
• Height-restricted grows: at up to 2 m, train it hard in veg or it will outgrow a small space.

Flowering and Buds of Northern Lights

Indoors, flip Northern Lights to a 12/12 light cycle to trigger flowering, which runs 8 to 10 weeks. Outdoors it ripens through October. It shows a moderate stretch after the flip, carried by its Thai side, then settles into dense, resin-heavy, compact colas.

Through bloom, drop humidity to 40 to 45% and keep air moving so the tight flowers do not trap moisture. The buds build a classic earthy, piney aroma with a sweet depth, the profile that made Northern Lights a benchmark for indica genetics.

At 17% THC it sits in the medium range, so the effect is balanced and comfortable, a focused, happy and relaxed feel rather than an overwhelming one.

Common Problems and Pro Tips

Northern Lights is beginner-friendly, but its height and dense buds point to a few things worth watching.

• Control the height: its Thai side can push it to 2 m, so top and train early, especially indoors.
• Bud rot in dense colas: its tight, resinous flowers can trap humidity, so keep a fan moving and humidity below 45% late in flower.
• Favor dry conditions: it leans to a dry climate, so strong airflow matters more for this strain than for most.

Expert tip: this is a foundational strain that is hard to get wrong, which is why so many growers learn on it. Manage the stretch with early training, keep the air dry and moving around the dense colas, and cure slowly to bring out its classic earthy-pine, sweet aroma.

Aroma, Flavor and Effects

The nose is classic and grounded: a deep, earthy base with a fresh pine lift and a sweet undertone, the benchmark Northern Lights profile that shaped a generation of indicas. It is rich rather than sharp, and it deepens as the buds cure.

The flavor follows the nose, earthy and piney with a sweet finish. On the effect side it is focused, happy and relaxed, a comfortable, grounded feel that balances a clear head with an easy body. Because THC runs a steady 17%, it stays mellow and approachable.

Dominant terpenes

Northern Lights carries a layered terpene profile. The most influential are Myrcene, Caryophyllene, Humulene, Pinene, Valencene and Eucalyptol: Myrcene lays down the deep, earthy base, Caryophyllene and Humulene bring a spicy, woody depth, Pinene the fresh pine note that defines its nose, Valencene a sweet, fruity edge, and Eucalyptol a cool, fresh lift. Behind them sits a supporting cast, including Phellandrene, Borneol and Phytol, which rounds out its earthy, piney character.

Nutrient Schedule

Treat the figures below as a starting map, not a rulebook. Northern Lights is a steady, productive feeder, so read the plant first: tip burn means back off, while pale, slow growth means it wants a little more. All values use EC.

Keep the pH around 6.0 to 6.5 in soil and 5.5 to 6.0 in hydro so the roots can actually take up what you feed.

What to Do With Your Trim: Extracts and Hash

Northern Lights builds a classic, heavy coat of resin from its Afghani roots, so its trim is genuinely worth keeping. The sugar leaves you take off while manicuring are loaded with trichomes and suit Ice Water Hash, where cold water and agitation separate the resin heads into a clean, solventless concentrate. Pressing that hash into rosin keeps the earthy-pine flavor intact, or you can run a solvent extraction if that is your setup. The bare stems will not extract, but chopped and composted they feed organic matter back into the soil for your next grow.

Harvesting, Drying and Curing Northern Lights

Timing the harvest comes down to the trichomes. Grab a loupe and watch the heads turn from clear to milky white; a scattering of amber signals peak ripeness. Indoors this lands 8 to 10 weeks after the flip, and outdoors the plants are ready through October.

After the cut, hang the branches in a dark room at 59 to 68°F with humidity near 50% and gentle air movement. Slow beats fast: drying over 10 to 14 days protects the earthy, pine and sweet aromas that define this strain. When the small stems snap instead of bending, move the buds into jars.

Cure in sealed glass, opening the jars daily for the first week to let moisture escape, then easing off as the aroma deepens. Two to four weeks of patience here is where the classic earthy-pine character and sweet finish really come forward, and it is the step most first-time growers rush.

Frequently Asked Questions

Is Northern Lights easy to grow for beginners?

Yes, Northern Lights is famously beginner-friendly, which is a big part of its legend. Its hardy Afghani genetics are forgiving and it finishes in 8 to 10 weeks. The main thing a new grower should plan for is its height, which can reach 2 m from the Thai side, so top and train it early indoors.

How long does Northern Lights take to flower?

Northern Lights flowers in 8 to 10 weeks once you switch it to a 12/12 light cycle indoors. Grown outdoors, it is ready through October. It shows a moderate stretch after the flip from its Thai heritage, then settles into dense, resin-heavy, compact colas over the back half of bloom.

How strong is Northern Lights?

Northern Lights has a THC level of 17%, which places it in the medium range. The effect is focused, happy and relaxed, a comfortable, grounded feel that balances a clear head with an easy body. That steady potency is a big reason it remains such an approachable, widely loved classic.

How much does Northern Lights yield?

Northern Lights is a high-yielding strain. Indoors it gives around 1.47 to 1.64 oz/ft², and outdoors it reaches 17.64 to 21.16 oz per plant in good conditions. Managing its height with training, plus strong light and a dry environment, is what pushes it toward the top of that range.

What does Northern Lights taste and smell like?

Northern Lights leads with a classic, deep, earthy aroma with a fresh pine lift and a sweet undertone, the benchmark profile that shaped a generation of indicas. It is rich and grounded rather than sharp. Both the aroma and flavor deepen as the buds cure slowly in the jar after harvest.

Why is Northern Lights such a famous strain?

Northern Lights is one of the foundational strains in modern cannabis, prized for decades for its hardy, easy growth, dense resinous buds, and a balanced, comfortable effect. Its pure Afghani x Thai genetics have been used to breed countless other strains, which cements its status as a true classic.