Looking for the highest-yielding autoflowering strains that actually live up to the marketing? I’ve been growing autos for years — indoors and out, including a couple of seasons over in Spain — and after trying my fair share of “XXL yield” hype, these are the ones that genuinely perform. Autoflowers have come on leaps and bounds recently, and a few now rival photoperiod plants for yield without the 12/12 flip.
Best high-yield autos at a glance
- Jack 47 Auto (Sweet Seeds) — the biggest producer I’ve grown; a few ounces per plant in a large pot.
- Seedsman ‘Big’ — up to 190g of indica-dominant bud per plant outdoors.
- Cream Mandarine (Sweet Seeds) — 50g+ off-season in Spain in an autowatering planter; superb high.
- Sensi Skunk Auto — hardy and UK/Scotland-friendly.
- Magnum (Buddha Seeds) — consistent, easy, great active high.
Want the full grow lowdown before you pick a pot? Check the best soil for autoflowers, the ultimate autoflower growing guide, and where to buy seeds in the UK.
Updated August 2026 — with real grow yields from our own runs.
Autoflowering strains have come on in leaps and bounds over recent years, and now the renowned Sensi Seeds have some really nice examples, with people reporting great yields from the Sensi Skunk Autoflower. The kind of thing that would grow really well outdoors in the UK, even Scotland by the sounds of things it’s very hardy.
Dutch Passion also have an excellent collection of autoflowering seeds including classics like Auto Blueberry and Auto Mazar. For super high yields check out their ‘The Ultimate’.
The Magnum from Buddha Seeds is also a firm favourite which I found easy to grow. It has wonderful active high that helps you get stuff done. No growing difficulties at all and very consistent. Well worth your time. Details of growing the Magnum here.
Dinafem Cheese XXL is also wonderful and exhibits very long buds of fruity goodness in no time at all. This plant is in a league of its own. Really easy to grow and massive buds of cheesey type weed. A complete winner. A heavier, fun stone.
If you are purely looking for yield then Jack 47 Auto from Sweet Seeds literally explodes and is definitely one of the most powerful autos that I have seen. Nice taste and an up high, you can’t ask for much more then this. She’s a beast. Easy to get a few ounces per plant with this one in a large pot.
Sweet Afghani Delicious from Sweet Seeds also is an extremely reliable yielder with strong high.
Fast Buds have some great yielding plants too. They breed classic American genetics into autoflowers with fantastic results. Well worth checking out. Their Girl Scout Cookies is a particularly fierce and tasty cosmic Indica I wont be forgetting in a hurry.
Seedsman have just released a Critical based autoflowering plant called ‘Big‘ which promises yields of 190g of hard hitting indica buds per plant outdoors.
More recently I was lucky to have a chance to grow Sweet Seeds Cream Mandarine. This really is an outtstanding plant, I got well over 50g growing this in the off season in Spain in an autowatering planter. And the high is excellent – just as good as any photoperiod variety – and it has a beaautiful smell of manadarines. Highly recommended.
Related reading: The Ultimate Guide to Growing Autoflowers · Magnum autoflowering cannabis · Best soil for autoflowers
