Flowering Type

Autoflowering

Parental lines

Afghani x Thai

THC content

High THC (16-24%)

CBD content

Low CBD (0-1%)

Autoflowering seed to harvest time

10 to 12 weeks

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Suitable climates

Cool, Dry, High altitude, Hot, Temperate, Warm

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From the breeder

Bigger plants and commensurate yields than the standard NL Auto strain.

00 Seeds breeder notes

Aroma

Floral

Parental lines

AfghaniThai

Description

Bigger plants and commensurate yields than the standard NL Auto strain.

NL XXL is a special selection of our largest and most productive Northern Lights Auto plants. Buds with a large volume of resin together with a very easy cultivation. Plants that retain the sweet and spicy aroma and delivering an intense effect both physically and mentally. 18% THC.

Indoors:

Yield: 550 - 650 gr/m²
Total cultivation time: 85 - 90 days
Height: 90 - 110 cm.

Outdoors:

Yield: 200 gr/plant
Harvest: From April to November
Height: 130 - 160 cm.

Characteristics

Brand/breeder

00 Seeds

Parental lines

Afghani x Thai

Type

Indica dominant

Flowering type

Autoflowering

Sex

Feminised

THC potential

High THC (16-24%)

CBD potential

Low CBD (0-1%)

Yield potential outdoor

Average Yield (200-450gr/plant)

Yield potential indoor

High Yield (450-600gr/m2)

Plant size

Medium

Seed to harvest time (autoflowering)

10 to 12 weeks

Suitable climate

Cool, Dry, High altitude, Hot, Temperate, Warm

Aroma

Floral

SKU

00S-NLXXL-AUTO-FEM

Grow guide

Autoflowering outdoor timeline

Autos can be sown in multiple waves through the season for staggered harvests.

Stage 1

Germination

April – July

Wait for: warmer days, no frost, stable temperatures

Watch for: cold nights, overwatering, weak early light

Stage 2

Seedling / Transplant

1–2 weeks after sprouting

Wait for: strong light, mild weather, protected start

Watch for: slug damage, stretching, transplant stress

Stage 3

Vegetative Growth

Weeks 2–5

Wait for: long bright days, healthy root growth

Watch for: stunting, nutrient burn, pest pressure

Stage 4

Flowering

Weeks 5–8+ depending on cultivar

Wait for: steady sunshine, decent airflow, dry spells

Watch for: mould, heavy rain, snapped branches

Stage 5

Harvest

Weeks 8+ or summer to early autumn

Wait for: mature trichomes, swollen buds, finished aroma

Watch for: bad weather, bud rot, harvesting too early

Indoor autoflowering timeline

Autoflowers follow their own internal clock, making indoor timelines easier to plan from seed to harvest.

Week 0

Germination

Healthy seedling emergence

Wait for: healthy seedling emergence

Watch for: overwatering, weak starts

Week 1–2

Seedling

Steady early growth

Wait for: steady early growth

Watch for: stretching, stress, excess moisture

Week 2–5

Early Growth

Strong leaf and root development

Wait for: strong leaf and root development

Watch for: stunting, overcrowding, early stress

Week 5–9+

Flowering

Bud development and visible maturity

Wait for: bud development and visible maturity

Watch for: humidity issues, poor airflow, plant stress

Week 8–12+

Harvest Window

Finished flowers and mature trichomes

Wait for: finished flowers and mature trichomes

Watch for: harvesting too early

Reviews

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We found matching review(s) Clear filters

Debra Seibt 27.03.2025

Flavour: Excellent

buyer

Very healthy and good feeling..

As described: YesExpected Yield: ExpectedRecommend to others: Yes

Anonymous 03.02.2025

Found Strain: Online Browsing

buyer

All seeds germinated, all were healthy. Northern light is much less pungeant when growing and drying.

As described: YesExpected Yield: BelowRecommend to others: Yes

Johnson Rule 29.05.2024

buyer

Only 2 of the five seeds sprouted. I am disappointed in this result.

Seedsman (28.10.2026): Thanks for your review. We do test seeds from all the batches of seeds that we sell - and only release for sale seeds that test over 95% germination - we are therefore very confident with the quality of the seeds that we sell. We also hold our suppliers to the same high standards. This said these are live products and competencies & environments vary so we try to help customers if they have issues. Please reach out to our customer service team to see what they can do to help, and check on our blog for our recommended germination techniques. Best Seedsman

wh0a 30.04.2022

buyer

5/5 Germination. My first grow ever and couldn't have been more pleased. I recommend for newbie growers to learn as this plant is very forgiving with mistakes. Nice beautiful buds in about ~90 days.

Giorgos F. 02.08.2021

buyer

monstrous! but it will take it's time ...and lots of space

Please note that some customers choose to leave a rating without writing a review, and because of this the number of ratings will differ from the number of reviews.

Northern Lights XXL Auto Feminised Seeds

Flowering Type

Autoflowering

Parental lines

Afghani x Thai

THC content

High THC (16-24%)

CBD content

Low CBD (0-1%)

Autoflowering seed to harvest time

10 to 12 weeks

Yield indoor

High Yield (450-600gr/m2)

Plant size

Medium

Suitable climates

Cool, Dry, High altitude, Hot, Temperate, Warm

Autoflowering outdoor timeline

Indoor autoflowering timeline

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