Seeds
Runtz Fast Feminised Seeds
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SKU: HDS-RUN-FAST-FEM
Faster-flowering version of the new classic West Coast strain.
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Flowering Type
Early/fast
Parental lines
Runtz x Uncirculated OG Auto
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
Dry, Warm
From the breeder
Faster-flowering version of the new classic West Coast strain.
Humboldt Seed Org. breeder notesParental lines
RuntzUncirculated OG Auto
Faster-flowering version of the new classic West Coast strain.
Runtz FAST is a quicker-flowering version of Runtz, the Zkittlez / Gelato cross that has garnered so many cannabis headlines in recent years. The 'FAST' attribute is imparted by the addition of OG Auto genes yet without transferring the auto-flowering properties usually associated with ruderalis genetics. A vigorous and hardy strain.
Runtz FAST is 70% indica, 20% ruderalis with 10% sativa. Growers can now experience the great terpene profile of Runtz with shorter flowering times. Care should be taken not to overfeed this strain.
Indoors, flowering takes 50 - 53 days with yields in the range 400 - 450gr/m2. Outdoors in the northern hemisphere, harvest is due at the end of September with each plant capable of producing as much as 1000 gr. Colas are long and multi-coloured with heavy resin production.
Black pepper spice and pungent fuel scents are predominant complemented by sweet 'n' sour candy and earthy pine. THC production is between 18 - 21% or more while CBD is low at just 0.1%. The effect is functional for daytime use as well as being useful for creatively-minded persons. Reports indicate that it is useful for mild pain relief.
Brand/breeder
Humboldt Seed Org.
Parental lines
Runtz x Uncirculated OG Auto
Flowering type
Early/fast
Sex
Feminised
THC content
High THC (16-24%)
CBD content
Low CBD (0-1%)
Suitable climates
Dry, Warm
SKU
HDS-RUN-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
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