Seeds
Watermelon OG Feminised Seeds
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SKU: ADV-WMOG-FEM
Balanced hybrid strain with good production, high potency and a mouth-watering taste.
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Flowering Type
Photoperiod
Parental lines
Melon Purple x Black OG
THC content
Very High THC (25%+)
CBD content
Low CBD (0-1%)
Photoperiod flowering time
7 to 9 weeks
Yield indoor
High Yield (450-600gr/m2)
Plant size
Medium
Suitable climates
Wet, Hot, Cool, Dry, Temperate
From the breeder
Balanced hybrid strain with good production, high potency and a mouth-watering taste.
Advanced Seeds breeder notesAroma
EarthyFruitySpicy
Parental lines
Melon PurpleBlack OG
Balanced hybrid strain with good production, high potency and a mouth-watering taste.
Watermelon OG is a balanced indica / sativa hybrid strain with very high THC production potential alongside good yields. It is a cross of Melon Purple and Black OG cannabis strains.
Suitable for both indoor and outdoor cultivation, Watermelon OG grows into medium-sized plants with a height of 80 - 100 cm. indoors while those grown outdoors are rather taller at 180 - 200 cm. Flowering times indoors are within the range of 55 - 60 days with yields likely to be between 450 - 550 gr/m2. Outdoor crops will be ready between the 20th - 30th September in the northern hemisphere. Buds are shiny with resin.
Both the scent and flavour are sweet and fruity with watermelon to the fore. THC levels are very high at 25% giving a potent, yet well-balanced, effect.
Brand/breeder
Advanced Seeds
Parental lines
Melon Purple x Black OG
Variety
Indica / Sativa hybrid
Flowering type
Photoperiod
Sex
Feminised
THC content
Very High THC (25%+)
CBD content
Low CBD (0-1%)
Yield outdoor
High Yield (450-750gr/plant)
Yield indoor
High Yield (450-600gr/m2)
Plant size
Medium
Photoperiod flowering time
7 to 9 weeks
Northern hemisphere harvest
October
Suitable climates
Wet, Hot, Cool, Dry, Temperate
Aroma
Earthy, Fruity, Spicy
SKU
ADV-WMOG-FEM
Photoperiod outdoor timeline
Photoperiod strains rely on seasonal daylight changes, so harvest timing is closely tied to your local climate.
Stage 1
Germination / Early Start
March – April
Wait for: frost risk easing, stronger spring light
Watch for: cold snaps, slow starts, excess moisture
Stage 2
Seedling / Transplant
April – May
Wait for: milder nights and settled weather
Watch for: transplant shock, wind exposure, pests
Stage 3
Vegetative Growth
June – July
Wait for: long days, regular feeding, healthy expansion
Watch for: overcrowding, nutrient issues, insect damage
Stage 4
Flowering
August – September
Wait for: shortening days, dry airflow, branch support
Watch for: mould, botrytis, high humidity, bad weather
Stage 5
Harvest
Late September – October
Wait for: ripe trichomes, dense finished flowers
Watch for: autumn rain, rot, early frosts
Indoor photoperiod timeline
Photoperiod strains give indoor growers more control over size, shape, and when flowering begins.
Week 0
Germination
Strong early establishment
Wait for: strong early establishment
Watch for: inconsistent starts, excess moisture
Week 1–2
Seedling
Stable structure and healthy growth
Wait for: stable structure and healthy growth
Watch for: stretch, early stress
Week 3–6+
Vegetative Growth
Desired plant size and canopy shape
Wait for: desired plant size and canopy shape
Watch for: overcrowding, uneven growth, training stress
7–12+ weeks
Flowering Phase
Strong flower formation and steady development
Wait for: strong flower formation and steady development
Watch for: humidity, airflow, support issues
Harvest
Harvest Window
Finished flowers and mature trichomes
Wait for: finished flowers and mature trichomes
Watch for: cutting too early or pushing too long
