Seeds
Grapefruit Superstar Feminised Seeds
No reviews yet
SKU: AMG-GRFRSS-FEM
Early-flowering, predominantly sativa hybrid.
Choose your pack
Total
- Out of stock
- Orders sent from the US
- Tracked discreet delivery
.8e091a2b.svg)
Flowering Type
Photoperiod
Parental lines
Cinderella 99 (Shiva Skunk x Jack Herer) x Superfast Sativa
THC content
High THC (16-24%)
CBD content
Low CBD (0-1%)
Autoflowering seed to harvest time
Information not available
Yield indoor
Information not available
Plant size
Information not available
Suitable climates
Humid, Warm
Parental lines
Cinderella 99 (Shiva SkunkJack Herer)Superfast Sativa
Early-flowering, predominantly sativa hybrid.
Grapefruit Superstar is a predominantly sativa strain bred by crossing Cinderella 99 with a strain known only as Superfast Sativa. Grapefruit Superstar is easy to grow, is fast-flowering and thrives in conditions of low light making it a great choice for outdoor cultivation in higher latitudes.
Vigorous in vegetative growth, Grapefruit Superstar can grow to a height of up to 300 cm. outdoors so it should be put into an early flowering schedule indoors unless space is no problem. Yields of about 500 gr/m2 in 8 - 9 weeks of flowering indoors while outdoors in the northern hemisphere harvest will be in late September.
It is a typically-uplifting sativa strain which helps to combat fatigue.
Brand/breeder
Amsterdam Genetics
Parental lines
Cinderella 99 (Shiva Skunk x Jack Herer) x Superfast Sativa
Flowering type
Photoperiod
Sex
Feminised
THC content
High THC (16-24%)
CBD content
Low CBD (0-1%)
Suitable climates
Humid, Warm
SKU
AMG-GRFRSS-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
- No reviews collected for this product yet -
New content loaded
