Spliff Seeds: 25 Amsterdam Strains From a 1995 Breeder

Spliff Seeds started in 1995 and still breeds out of Amsterdam, which in seed terms means the older lines have had thirty years of selection poured into them. It shows up in unglamorous ways: plants that come up uniform, mould resistance that holds through a damp Dutch autumn, and flowering times that land roughly when the breeder says they will.

Northern Lights Special Runs Through Half the Catalogue

Look closely at the lineages and the same father keeps appearing. Their AK is an AK mother crossed with Northern Lights Special, and that same male sits behind Blue Berry and Snow White too. It's why so much of this shelf finishes in 8 weeks and stays short enough for a cupboard. If you're comparing breeders across our full cannabis seeds range, that's the Spliff Seeds signature: compact, fast, heavy for the footprint.

Bronze, Silver, and Gold: What the Line Names Mean

Spliff Seeds splits its catalogue into the Bronze and Silver Lines, which hold the regular seeds, and the Gold Line, which is the feminized collection. What you see on this page is the feminized side, Gold Line photoperiods plus the feminized autos. Watch out for that if you came looking for regulars to breed with, because you won't find them here. For hunting males and making your own crosses you'd need a regular-seed shelf instead.

Match the Strain to Your Ceiling Height

Tight indoor space is where this breeder earns its keep. Snow White tops out at 60-80cm indoors and still pushes 500-600g/m² in 8-9 weeks, while Crystal White asks for 110-130cm and pays it back with 550-650g/m² and a fruity pineapple smoke that coats your mouth. Moon Walker Kush stays under 100cm and smells of tangy lemon over diesel. On the auto side, Mega Power Plant Autoflower runs 10-12 weeks from germination to harvest at 500-575g/m² and takes to a SOG happily, and Dutch Blue Autoflower keeps to 40-75cm with an earthy, fruity finish. Got a garden instead? Fast Bud Outdoor is a 90% sativa that stretches to 2-2.5m and can hand you 650g per plant, but it won't be ready until mid or late September, so it's the wrong pick for a balcony or a short season.

What Growers Report Back About Spliff Seeds

The strain first-timers keep reordering is AK. It handles soil, coco, or hydro, shrugs off temperature swings, flowers in 8 weeks, and gives 500g/m² indoors of rock-hard, resinous bud with a spicy noble-wood smell. The honest catch on this shelf is Blue Berry: it throws three different phenotypes, so your plants vary in colour, bud shape, and effect, which is fun if you like phenotype hunting and annoying if you wanted a uniform canopy. So if this is your first Spliff Seeds packet and you're growing indoors, take AK over Fast Bud Outdoor and keep the sativa for a year when you have a garden and patience until autumn.