Seeds
Sweet Critical Fast Feminized Seeds
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SKU: 00S-SWC-FAST-FEM
Fast, productive, sweet-tasting and high-THC strain.
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Flowering Type
Early/fast
Parental lines
Critical Swiss
THC content
High THC (16-24%)
CBD content
Low CBD (0-1%)
Photoperiod flowering time
5 to 7 weeks
Yield indoor
High Yield (450-600gr/m2)
Plant size
Medium
Suitable climates
Dry, High altitude, Hot, Temperate, Warm
From the breeder
Fast, productive, sweet-tasting and high-THC strain.
00 Seeds breeder notesAroma
Fruity
Parental lines
Critical Swiss
Fast, productive, sweet-tasting and high-THC strain.
Sweet Critical FAST is a selected phenotype of Sweet Critical that was selected for its extra fast finishing time. This strain's heritage is from the Swiss Critical Mass line. It brings together all the best of the most powerful and aromatic Critical genetics. Easy to grow, resistant and with high THC.
Indoors, plants reach a height of 75 - 95 cm. tall and take an incredible 40 - 45 days to produce yields of 400 - 500gr/m2. Outdoors, plants are a lot bigger when planted in the ground, 160 - 220 cm, and northern hemisphere harvests are due between September 10th - 20th, a good 10 days earlier than with the standard Sweet Critical strain.
Brand/breeder
Parental lines
Critical Swiss
Variety
Indica dominant
Flowering type
Early/fast
Sex
Feminised
THC content
High THC (16-24%)
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
5 to 7 weeks
Northern hemisphere harvest
September
Suitable climates
Dry, High altitude, Hot, Temperate, Warm
Aroma
Fruity
SKU
00S-SWC-FAST-FEM
Early/Fast outdoor timeline
Fast / Early strains keep the photoperiod growth pattern, but they begin flowering earlier and usually finish sooner — helping outdoor growers harvest before late-season weather becomes a problem.
Stage 1
Germination / Early Start
March – April
Wait for: warmer days, lower frost risk, stable spring weather
Watch for: cold snaps, excess moisture, slow early growth
Stage 2
Seedling / Transplant
May
Wait for: steady light, mild conditions, protected early growth
Watch for: transplant stress, pests, wind exposure
Stage 3
Vegetative Growth
June – July
Wait for: long bright days, healthy expansion, strong structure
Watch for: overcrowding, nutrient issues, insect pressure
Stage 4
Flowering
From late July
Wait for: first signs of bloom, good airflow, settled conditions
Watch for: humidity, mould pressure, poor weather
Stage 5
Harvest
From early September
Wait for: ripe trichomes, dense finished flowers, harvest readiness
Watch for: cutting too early, rain, bud rot
Indoor Early/Fast timeline
Fast / Early strains are most valuable outdoors, where earlier flowering and shorter bloom times help growers harvest before poor autumn weather. Indoors, their main benefit is a faster flowering phase than photoperiod versions.
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 3–6+
Vegetative Growth
Desired plant size and strong structure
Wait for: desired plant size and strong structure
Watch for: overcrowding, uneven growth, training stress
6–10 weeks
Flowering Phase
Strong bud formation and steady flower development
Wait for: strong bud formation and steady flower development
Watch for: humidity issues, poor airflow, plant stress
Harvest
Harvest Window
Finished flowers and mature trichomes
Wait for: finished flowers and mature trichomes
Watch for: harvesting too early or pushing plants too long