Seeds
Runtz XL Auto Feminised Seeds
SKU: SS-RUNTZXL-AUTO-FEM
Sweet, fruity, potent auto-flowering strain with very high THC and high yields.
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Flowering Type
Autoflowering
Parental lines
Runtz x Sweet Gelato Auto®
THC content
Very High THC (25%+)
CBD content
Low CBD (0-1%)
Autoflowering seed to harvest time
8 to 10 weeks
Yield indoor
High Yield (450-600gr/m2)
Plant size
Short
Suitable climates
Cool, Dry, Hot, Temperate, Warm, Wet
From the breeder
Sweet, fruity, potent auto-flowering strain with very high THC and high yields.
Sweet Seeds breeder notesAroma
Fruity
Parental lines
RuntzSweet Gelato Auto®
Sweet, fruity, potent auto-flowering strain with very high THC and high yields.
Runtz XL Auto is a taller auto-flowering strain created by crossing Runtz with Sweet Gelato Auto. This is an sativa/indica hybrid with high yields as well as high THC production - all in a short life span.
Runtz XL Auto plants grow to between 60 - 120 cm. tall and take just 8 weeks from the first pair of leaves through to harvest. Indoors growers will harvest 400 - 550 gr/m2 while those growing outdoors should obtain 50 - 175 gr./plant.
Rich in terpenes, Runtz XL Auto is intensely sweet and fruity and with very high levels of THC its effect is powerful yet well-balanced as befits its almost 50/50 sativa/indica genetics, mentally stimulating while being physically relaxing.
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Brand/breeder
Parental lines
Runtz x Sweet Gelato Auto®
Variety
Indica / Sativa hybrid
Flowering type
Autoflowering
Sex
Feminised
THC content
Very High THC (25%+)
CBD content
Low CBD (0-1%)
Yield outdoor
Modest Yield (up to 200gr/plant)
Yield indoor
High Yield (450-600gr/m2)
Plant size
Short
Autoflowering seed to harvest time
8 to 10 weeks
Suitable climates
Cool, Dry, Hot, Temperate, Warm, Wet
Aroma
Fruity
SKU
SS-RUNTZXL-AUTO-FEM
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
