Collection: FASTFLOWERING

Fast flowering genetics sit between the two formats most people know. They're photoperiod strains, so they respond to light cycle rather than age the way an autoflower does, but they carry autoflowering genetics one generation back, which shortens the flowering stage compared to the standard version of the same strain. The result keeps the structure and potency of a photoperiod line while finishing noticeably sooner.

Three breeders label this differently, which is the main source of confusion. Humboldt Seeds use "Fastflowering" in full, Sweet Seeds call theirs "F1 Fast Version", and 420 Fast Buds shorten it to "FF". They're describing the same underlying approach.

Humboldt Seeds account for most of what's here, all fast versions of well-known West Coast names: White Runtz, Runtz, Ice Cream Cake, Peanut Butter Breath, Limited Edition Gushers and Green Crack. 420 Fast Buds' FF line covers GG4 Sherbet, Gorilla Cookies, Orange Sherbet and Wedding Cheesecake. Sweet Seeds contribute two F1 Fast Versions, Cream Caramel and Sweet Mandarine Zkittlez, both fast versions of strains they're best known for.

• Humboldt Seeds Fastflowering: White Runtz, Runtz, Ice Cream Cake, Peanut Butter Breath, Limited Edition Gushers, Green Crack, White Widow
• 420 Fast Buds FF: GG4 Sherbet, Gorilla Cookies, Orange Sherbet, Wedding Cheesecake
• Sweet Seeds F1 Fast Version: Cream Caramel, Sweet Mandarine Zkittlez

All seeds here are sold as collectible souvenirs and for genetic preservation only, see our FAQ page for the full detail on that. Our guide to feminised, autoflowering and regular seeds explains how these categories differ, and the full Autoflower and Feminized Seeds collections cover the standard versions of most of these strains.