How to Grow Northern Lights
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Northern Lights
Cannabis sativa subsp. indica
herbNorthern Lights is a famous hybrid cannabis strain known for its compact growth, fast flowering time, and potent effects. It produces dense, resinous buds with a sweet, spicy aroma and displays stunning purple and blue hues under cool conditions.
When should you plant Northern Lights in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Northern Lights timeline · Pittsburgh, PA (Zone 6b)
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Plant Northern Lights
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Northern Lights
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Northern Lights dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Best grown indoors year-round with controlled climate; outdoor cultivation requires warm, frost-free regions
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Get my Northern Lights timeline →Growth Stages
Seedling
7-14 daysSmall plants with first true leaves emerging; very delicate with rapid growth under lights
Maintain high humidity (60-70%), provide 18-24 hours of light daily, keep soil moist but not soggy, use mild diluted nutrients or none at all
Vegetative
3-8 weeksVigorous growth phase with multiple leaf sets developing; plant builds sturdy stems and branch structure
Maintain 18 hours of light daily, provide nitrogen-rich fertilizer, ensure adequate air circulation with fans, prune lower branches for better light penetration
Pre-flowering
1-2 weeksPlant begins to show sexual characteristics; small white or red pistils appear at branch nodes
Transition from vegetative nutrients to flowering nutrients, maintain stable temperatures 65-75°F (18-24°C), continue air circulation
Flowering
45-50 daysDense, resinous buds develop rapidly; plant may display purple, blue, or dark coloration; characteristic sweet, spicy aroma emerges
Switch to 12-hour light/12-hour darkness cycle, use phosphorus and potassium-rich flowering nutrients, reduce nitrogen, maintain humidity below 50% to prevent mold, monitor trichomes for harvest readiness
Harvest & Drying
2-4 weeks drying and curingBuds fully mature with cloudy to amber trichomes; resin production peaks
Harvest when 70-90% of trichomes are cloudy white with 10-30% amber for optimal potency and effects, dry in dark 60-70°F environment with 40-50% humidity for 7-10 days, cure in sealed jars for 2-4 weeks
Companion Planting
Plan your garden →Common Pests
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Increase humidity, spray with neem oil or insecticidal soap, ensure good air circulation, use predatory mites like Phytoseiulus persimilis
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Use yellow sticky traps, spray with neem oil or insecticidal soap, maintain adequate airflow, introduce beneficial insects
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Allow soil surface to dry between waterings, use gnat traps, apply diatomaceous earth to soil surface, maintain proper drainage
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Reduce humidity, increase air circulation, spray with sulfur dust or neem oil, remove affected leaves, maintain 40-50% humidity
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Improve air circulation, reduce humidity, remove infected buds, maintain 40-50% humidity during flowering, avoid overhead watering
Uses
Relaxation and Sleep Support
MedicinalNorthern Lights is renowned for its calming, sedating properties that many users report help with stress relief and sleep. The strain's balanced cannabinoid profile contributes to these relaxing effects. [source]
Pain and Inflammation Management
MedicinalUsers commonly employ Northern Lights for managing chronic pain and inflammation due to its high resin production and potent cannabinoid content. Both THC and CBD present in cannabis varieties interact with pain receptors. [source]
Infusions and Edibles
CulinaryThe buds can be processed into oils, butters, or infusions for culinary applications when legally permitted. The sweet, spicy flavor profile carries through into edible preparations. [source]
Aromatherapy and Fragrance
HouseholdThe distinctive sweet, spicy, earthy aroma makes Northern Lights popular for extracting essential oils and creating incense. The terpene profile contributes to its characteristic scent. [source]
Horticultural Breeding and Genetics
CraftNorthern Lights is a foundational strain in cannabis breeding programs, valued for its stable genetics, fast flowering, and resin production. Many modern hybrids trace back to Northern Lights parentage. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Monitor trichomes with a jeweler's loupe or USB microscope—harvest when 70-90% are milky/cloudy white with 10-30% amber for balanced effects. Cut entire plant at base, hang upside down in dark 60-70°F room with 40-50% humidity for 7-10 days until stems snap cleanly, then cure in sealed glass jars for 2-4 weeks, burping daily.
Fun Facts
- 🌱 Northern Lights was first bred in the 1980s in the Pacific Northwest and later perfected in the Netherlands, becoming one of the most iconic cannabis strains in the world.
- 🌱 The strain gets its name from the spectacular aurora borealis display it can produce—plants often develop stunning purple, blue, and dark coloration when exposed to cool nighttime temperatures during flowering.
- 🌱 Northern Lights is famously compact and bushy, rarely exceeding 3-4 feet tall indoors, making it ideal for stealth growing and space-limited cultivators.
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