We carry 80+ Sweet Seeds strains — fast-finishing autos, F1 Fast Version photoperiods, high-CBD lines, and their signature red-and-purple phenotypes. Buy Sweet Seeds seeds for proven genetics, tight flowering windows, and yields that actually match the label.
Buy Sweet Seeds Cannabis Seeds — Range and Buying Guide
Sweet Seeds is a Valencia-based breeder that's been winning Spannabis cups since the mid-2000s, and they've earned the reputation. Every seed we stock is feminised — no male plants, no wasted grow space. The catalogue splits into four clear formats: autoflowers that finish in 7-9 weeks from germination, F1 Fast Version photoperiods that shave 1-2 weeks off traditional flowering, classic feminised photoperiods, and a CBD line built for low-THC harvests.
If you want the short version: autos for small tents and fast turnarounds, Fast Versions when you want photoperiod control without the wait, classic feminised when you're running a proper cycle, and CBD strains when you're not chasing THC at all.
Find Your Sweet Seeds Format
| Format | Seed to Harvest | Typical Yield Indoors | Good For |
|---|---|---|---|
| Autoflower (standard) | 7–9 weeks | 400–500 g/m² | First-time growers, small tents, quick turnarounds |
| XL Auto | 8–9 weeks | 500–650 g/m² | Experienced auto growers wanting photoperiod-sized yields |
| F1 Fast Version | 6–7 weeks flower | 450–600 g/m² | Northern outdoor growers, photoperiod control with speed |
| Classic Feminised | 8–9 weeks flower | 500–600 g/m² | Full light-cycle control, mother plants, clones |
| CBD Line | 8–9 weeks | 400–500 g/m² | Low-THC harvests, 1:1 ratios, daytime use |
The table's a starting point — choosing by format is simpler than getting lost in individual strain names. Once you know whether you want auto or photo, picking the strain is mostly terpene preference.
What We Carry
- Fast autoflowers — + Speed Auto (49 days flat), Green Poison Auto, Sweet Skunk Auto. Harvest in under 2 months.
- XL Autos — Crystal Candy XL Auto, Green Poison XL, Jack 47 XL, Cream Mandarine XL Auto. Auto timelines, photoperiod yields.
- Red and purple phenotypes — Red Poison Auto, Dark Devil Auto, Red Mandarine F1, Red Hot Cookies, Diablo Rojo XL. Around 80-95% of plants express the colour shift.
- F1 Fast Version photoperiods — Green Poison F1 Fast, Killer Kush F1 Fast, Cream Caramel F1 Fast, Papaya Zoap F1 Fast. Shave 1-2 weeks off traditional flowering.
- American genetics — Gorilla Girl XL, Runtz XL, Skywalker OG Runtz XL, Papaya Zoap, Mimosa Bruce Banner XL, Strawberry Banana Gelato XL.
- Classic feminised — Black Jack, Jack 47, Green Poison, Cream Caramel, S.A.D., Psicodelicia, San Fernando Lemon Kush.
- CBD line — Sweet Pure CBD, Sweet Pure Auto CBD, Honey Peach Auto CBD, Red Pure Auto CBD. THC under 1%, CBD up to 20%.
- High-potency heavy hitters — Gorilla Girl XL Auto, Jealousy Z XL, Orange Apricot Glue XL, Red Mimosa XL. 25%+ THC.
How to Choose Your Sweet Seeds Strain
New to growing? Buy an autoflower. Specifically, get Green Poison Auto or Cream Caramel Auto — both are forgiving, compact, and finish in 8 weeks. You don't need to flip light cycles, you don't need to worry about sex, and the plants stay small enough to hide in an 80x80 tent. If you want something to look at while it grows, order Red Poison Auto or Bloody Skunk Auto for the purple-crimson shift.
Intermediate growers should shop the XL Auto range. Green Poison XL Auto, Crystal Candy XL Auto, and Jack 47 XL Auto all push photoperiod-sized harvests on an autoflower timeline. Expect 500-650 g/m² if you dial in your lights and feeding.
If you've been growing for years and want full light-cycle control, the F1 Fast Versions are where Sweet Seeds actually innovates. Killer Kush F1 Fast Version finishes in 49 days of flower with genuine OG Kush terpenes. Gorilla Sherbet F1 Fast Version and Papaya Zoap F1 Fast Version both push 25%+ THC on a 7-week flower.
For CBD: get Sweet Pure Auto CBD if you want maximum CBD with barely any THC, or Honey Peach Auto CBD if you want a balanced 1:1 ratio with actual flavour. When in doubt, start with Green Poison Auto — it's the strain we recommend more than any other Sweet Seeds cultivar.
Frequently Asked Questions
What's the fastest Sweet Seeds strain to grow?
+ Speed Auto finishes its full life cycle in 49 days from germination — one of the fastest autoflowers commercially available. For photoperiods, Killer Kush F1 Fast Version and Sweet Cheese F1 Fast Version finish flowering in 6-7 weeks.
Are Sweet Seeds feminised?
Yes — every seed in the Sweet Seeds catalogue is feminised, including the autos, F1 Fast Versions, and CBD line. No male plants, no wasted tent space, no hermie surprises from their genetics.
What's the difference between Sweet Seeds XL Autos and standard autos?
XL Autos are bred from the tallest phenotypes across multiple generations. You'll get 110-160 cm plants instead of the usual 60-100 cm, with yields of 500-650 g/m² instead of 400-500. The timeline stays the same — 8-9 weeks from seed.
Which Sweet Seeds strain has the highest THC?
Gorilla Girl XL Auto, Red Hot Cookies, Orange Apricot Glue XL, and Papaya Zoap F1 Fast Version all reach 25%+ THC. Papaya Zoap F1 Fast tops out at 29% — genuinely heavy for a seed-grown plant.
Can Sweet Seeds autoflowers grow outdoors in Northern Europe?
Yes — autoflowers don't rely on day length, so you can plant from May through July and harvest before autumn rains hit. Cream Caramel Auto and S.A.D. Auto handle damp weather well thanks to good mould resistance.
Do Sweet Seeds CBD strains actually have low THC?
Sweet Pure CBD and Sweet Pure Auto CBD both test under 1% THC with CBD up to 15-20%. Red Pure Auto CBD sits at 0.5% THC and 17% CBD. These are genuine CBD lines, not marketing.
Running low on grow gear? Pair your Sweet Seeds order with an 80x80 tent kit, a carbon filter, and feminised-friendly nutrients. We stock everything you need to get from seed to harvest in one order.
Last updated: April 2026