How to Grow Northern Lights #10
Northern Lights #10 is a compact, fast and heavy-yielding indica, a select phenotype of the legendary Northern Lights line crossed with a secret hybrid. This 75% indica pairs a citrus and earthy flavor with a high 20-25% THC and a happy, relaxed and talkative effect, finishing in just 7 to 9 weeks. It is beginner-friendly to grow, with potency worth respecting.
This is a feminized photoperiod strain that stays compact at around 1.5 m, with the sturdy, bushy structure of its indica heritage. That manageable shape, its quick finish and its strong yield make it an easy, productive plant to grow, and its high THC gives it real punch for such a forgiving strain.
Recommended Strains
Northern Lights #10
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THC | 20% - 25% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 75% Indica / 25% Sativa |
Northern Lights
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THC | 17% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 90% Indica / 10% Sativa |
Potent, resinous and reliable, Northern Lights #10 is a rewarding way to grow a true Northern Lights descendant. You can see the full genetics and buy Northern Lights #10 seeds on the strain page, and browse the rest of our indica seeds alongside it.
Strain Profile at a Glance
| THC | High (20-25%) |
|---|---|
| Lineage | Northern Lights x Secret Hybrid |
| Type | Feminized (photoperiod) |
| Genetics | 75% Indica / 25% Sativa |
| Climate | Tropical |
| Flowering time | 7-9 weeks |
| Harvest (outdoor) | September |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.64-1.97 oz/ft² (500-600 g/m²) |
| Yield outdoor | 21.16-28.22 oz/plant (600-800 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Citrus, Earthy |
| Effects | Happy, Relaxed, Talkative |
Promos & Deals
Growing a Compact Indica
As a 75% indica, Northern Lights #10 grows into a sturdy, bushy plant of around 1.5 m, which makes it easy to manage. It is a feminized photoperiod strain, which means two things: every seed grows into a flowering female, so there is no need to sex the plants, and the plant flowers on light rather than age. Indoors you keep it under long days of around 18 hours while it grows, then switch to a 12/12 light cycle to trigger flowering.
Its compact, bushy structure responds well to simple training. A little low-stress training or light topping early on opens the canopy and helps light reach the lower bud sites, which is worth doing because this plant packs on dense, resinous flowers. The main thing to watch is airflow through that thick indica growth, which matters more here than height ever will.
Climate and Where to Grow It
Northern Lights #10 does best in a warm, sunny climate with plenty of light and good airflow, in keeping with its tropical preference. Its quick 7 to 9 week flowering means it finishes early, around September outdoors, before the wetter and colder weather of late autumn arrives. That early, fast finish is a real advantage in regions with a shorter or less predictable season.
It is a strong producer both indoors and out. Outdoors it can be very generous at 600-800 g per plant given room and sun, while indoors it returns a reliable 500-600 g/m² in a well-managed tent. As a compact indica it suits growers tight on space, since it delivers a big yield without needing much vertical room.
Whichever way you grow it, keep humidity under control through flowering to protect the dense buds: around 55-60% early on, nearer 40-45% in mid-bloom and lower still toward harvest. The thick, resinous indica colas can trap moisture, so steady airflow and sensible humidity are the keys to a clean finish. Aim for daytime temperatures around 68-80°F (20-27°C).
Feeding Schedule (EC Guide)
Northern Lights #10 is a vigorous feeder through its short flowering window, but it still pays to build nutrients up gradually and read the leaves rather than overfeed. Taper right off for the final flush so the citrus and earthy flavor comes through clean and the smoke finishes smooth. The ranges below are a starting guide; adjust them to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4-0.6 | Light feed while the roots establish |
| Vegetative growth | 0.8-1.2 | Raise nitrogen as the plant bushes out |
| Early flower | 1.2-1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4-1.6 | Peak bloom feed while the dense colas swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
Northern Lights #10 flowers fast, in just 7 to 9 weeks, which is quick even for an indica and one reason it is so beginner-friendly. As a 75% indica it stays compact and fills in dense, resin-heavy colas rather than stretching, putting its energy into bud instead of height. Outdoors the harvest window lands around September in the northern hemisphere.
Yields are a real strength. Outdoors it can reach 600-800 g per plant given sun and space, while indoors it returns around 500-600 g/m² under good light and a well-managed canopy. Keep the lower growth tidy so energy goes to the main bud sites, and harvest when most trichomes have turned cloudy for the fullest expression of its strength and flavor.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15-18°C) and 55-60% humidity for 7-14 days, until the thin stems snap rather than bend. A slow, even dry is important with buds this dense, since it stops the thick inner flowers staying damp while the outside dries out, which protects both the aroma and the heavy trichome coat that carries the potency.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure is what brings the citrus and earthy notes forward and smooths out the smoke, which is well worth the patience on a strain this resinous and strong.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Northern Lights #10 is a resinous, trichome-heavy plant, so its trim works well for dry sift, bubble hash or rosin. Given its high THC, that trim makes for a strong, flavourful concentrate run from material most growers would otherwise throw away.
Flavor and Terpenes
Northern Lights #10 has a clean, grounded profile: a bright citrus note over the deep, earthy base its Northern Lights heritage is known for. It is a smooth, natural flavor rather than a sweet or gassy one, and a good cure really brings that citrus-and-earth character forward in the jar and on the inhale.
Its terpene profile backs that up. Myrcene lays down an earthy, musky indica base, while limonene brings the bright citrus lift that defines the fresher side of the aroma. Caryophyllene adds a warm, peppery spice and humulene an earthy, hoppy depth, with alpha- and beta-pinene plus terpinolene giving a fresh, piney edge on top. Together they shape the citrus-and-earthy character the strain is known for.
Effects and Best Use
With its high 20-25% THC and 75% indica make-up, Northern Lights #10 delivers a strong, body-forward experience. It is reported as happy, relaxed and talkative: a good-natured, sociable lift that settles into a comfortable, heavy body relaxation. It is a potent strain, so while it stays approachable, it is worth starting with a moderate amount if you have a lower tolerance.
That profile makes it an afternoon or evening strain, well suited to unwinding, ideally with company given its talkative side. The combination of a fast, compact and forgiving grow, a strong yield and a clean citrus-earthy flavor, all with the pedigree of the Northern Lights line, is exactly why it stays a favourite.
Common Problems and Pro Tips
The main thing to manage with Northern Lights #10 is its dense indica growth. Those resinous, bushy colas can trap moisture and are prone to mould in a damp finish, so keep the air moving, bring humidity down as the buds mature, and open up the canopy with a little training so air can get through. Its compact 1.5 m height makes that easy in a tent.
Plan around its strengths. It is a heavy producer both indoors and out, so give it a good-sized pot and plenty of light to earn that yield, and support the heavier branches if they start to bend. Feed it steadily through its short flowering window but always read the plant rather than pushing nutrients, since a dense indica like this does not need a heavy hand.
As a pro tip, respect the potency and reward the flavor: with high THC, a little goes a long way, so cure it well and start moderate. Run a clean plain-water flush at the end, then follow the trichomes rather than the calendar and cure for three to four weeks, which brings the citrus-earthy side forward and smooths the smoke.
FAQ
How long does Northern Lights #10 take to flower?
It flowers fast, in about 7 to 9 weeks, which is quick even for an indica. Grown outdoors in the northern hemisphere it is usually ready to harvest around September, finishing before the colder, wetter weather arrives. That quick, early finish is a big part of what makes it beginner-friendly.
How much THC does Northern Lights #10 have?
It is a high-THC strain, testing at around 20-25%. That gives it a strong, body-forward effect, so while it stays approachable, it is worth starting with a moderate amount if your tolerance is lower. Combined with its 75% indica genetics, the result is a happy, relaxed and talkative experience.
How tall does Northern Lights #10 grow?
As a 75% indica it stays compact and bushy, reaching around 1.5 m. That manageable height makes it ideal for tents and discreet spots, and it still delivers a heavy yield without needing much vertical room. A little low-stress training opens the canopy and helps light reach the lower buds.
What does Northern Lights #10 taste like?
It has a clean flavor: a bright citrus note over a deep, earthy base from its Northern Lights heritage. Myrcene drives the earthy base, limonene adds the citrus lift, caryophyllene a peppery spice and humulene an earthy depth, with pinene giving a fresh edge. A good cure brings the citrus-earthy side forward.
How much does Northern Lights #10 yield?
It is a heavy producer. Outdoors it can reach 600-800 g per plant given sun and space, while indoors it returns around 500-600 g/m² under good light. Results depend on pot size, light and canopy management, so open up the bushy canopy and keep humidity in check to get the biggest, cleanest harvest.
Is Northern Lights #10 good for beginners?
Yes. It is compact, fast and forgiving to grow, finishing in 7 to 9 weeks and staying short enough for a tent, which makes the cultivation beginner-friendly. The one thing to be aware of is its high THC, so a newer user should go easy on the smoke and start with a moderate amount.
