Spliff Seeds: 25 Amsterdam Strains, Feminised & Auto

First things first: Spliff Seeds isn't a generic phrase for seeds you roll into a spliff. It's the name of a breeder in Amsterdam who has been selecting and stabilising genetics since 1995, and the 25 packs on this page are all theirs. If you searched the brand name and expected a shop full of unbranded stock, this is the actual brand hub.

Bronze, Silver, Gold: How The Catalogue Splits

Spliff Seeds keep their regular seeds in the Bronze and Silver Line, and their feminised work in the Gold Line. What you see here comes from the feminised side, autoflowers included, so you skip the male-hunting stage entirely. If you want to see how they stack up against the rest of our cannabis seeds, they sit in the sturdy, high-yield, no-drama camp rather than the boutique-exotic one.

Snow White Or Crystal White? Here's The Split

Both come from White Widow stock and both finish in 8-9 weeks, so the deciding factor is space. Snow White stays at 60-80cm indoors, throws lime-green foxtails wrapped in thick orange-brown hairs, and gives 500-600g/m². Crystal White stretches to 110-130cm and pushes 550-650g/m², with a fruity pineapple taste on the exhale. Watch out for the extra week: for proper crystal formation Crystal White really wants ten weeks, not eight, so don't plan your chop too early.

AK, Amnesiac, And The Autoflower Twins

AK is the one we'd hand a first-time grower. Eight weeks of flowering, 50-90cm indoors, happy in soil, coco, or hydro, and the buds smell pungent and spicy, closer to noble wood than to fruit. Yields land around 500g/m² indoors. Both AK and Amnesiac come in photoperiod and autoflower versions, so you can run the same flavour on a shorter clock. Mega Power Plant Autoflower goes from germination to harvest in 10-12 weeks with long candle-shaped buds and 500-575g/m² indoors, and it takes a SOG well. Moon Walker Kush is the short indica pick, under 100cm, with natural mould resistance and a lemon-and-diesel nose.

Outdoor Picks For A British Autumn

Fast Bud Outdoor is 90% sativa and finishes mid to late September in Dutch conditions, with up to 650g per plant off some of the biggest umbels going. The catch is size: 2-2.5m is not something you hide behind a shed. Dutch Blue Autoflower is the low-key alternative at 40-75cm, done 10-11 weeks after germination, and cold nights turn the leaves blueish.

What Growers Tell Us About Spliff Seeds

The feedback we see is consistent on one thing: uniformity. Growers who buy AK or Snow White tend to come back for the same pack because the plants finish together, which matters a lot if you're running one tent and one chop date. Blue Berry is the outlier, since it throws three phenotypes that differ in colour, bud shape, and effect, so treat that one as a small selection project rather than a copy-paste crop. Starting from scratch this autumn? Put AK indoors, Dutch Blue Autoflower on the balcony, and leave Fast Bud Outdoor for when you've got a proper garden.