Best Fast Growing Cannabis Seeds UK (Speed From Seed to Harvest 2026).
For many UK growers, speed is everything. Whether you're avoiding bad weather or just want quicker results, choosing fast growing seeds can significantly improve your success.
Fast-growing strains are bred to go from seed to harvest in as little as 7–10 weeks, making them ideal for:
UK outdoor seasons
Indoor quick cycles
Beginners
Multiple harvests per year.
⚡ What Are Fast Growing Seeds?
Fast growing seeds are strains that complete their entire lifecycle quickly, not just flowering.
Key traits:
Short vegetative stage
Fast flowering
Quick overall turnaround
Efficient growth.
🌱 Top 10 Fast Growing Seeds UK.
1. Quick One Auto
Total Time: 8 weeks
Why it’s great: One of the fastest available.
2. Fast Bud #2 Auto
Total Time: 7–8 weeks
Why it’s great: Ultra-fast growth.
3. Royal Dwarf
Total Time: 8–9 weeks
Why it’s great: Small + fast.
4. Auto Northern Lights.
Total Time: 9 weeks
Why it’s great: Easy and reliable.
5. Auto Critical.
Total Time: 8–9 weeks
Why it’s great: Fast + high yield.
6. Speedy Chile Fast.
Total Time: 8 weeks
Why it’s great: Balanced speed.
7. Auto AK.
Total Time: 8–9 weeks
Why it’s great: Consistent results.
8. Easy Bud Auto.
Total Time: 8 weeks
Why it’s great: Beginner-friendly.
9. Early Skunk.
Total Time: 7–8 weeks flowering
Why it’s great: Outdoor speed.
10. Quick Critical.
Total Time: 8 weeks
Why it’s great: Fast + productive.
⏱️ Why Choose Fast Growing Seeds?
1. Beat UK Weather.
Harvest before cold and rain hit.
2. Multiple Harvests.
Grow more cycles per year.
3. Lower Risk.
Less exposure to pests and mold.
4. Faster Results.
Perfect for impatient growers.
🧠 Fast Growing vs Fast Flowering.
Type Meaning
Fast Growing Whole lifecycle is quick
Fast Flowering Only flowering stage is faster
👉 Fast growing = better for UK outdoor growers
🌧️ Best Fast Seeds for UK Outdoor.
Top picks:
Quick One Auto
Auto Northern Lights
Early Skunk.
💡 Tips to Maximise Speed.
Use strong lighting
Keep temperatures stable
Avoid transplant stress
Use light nutrients early
❓ FAQs.
What is the fastest seed from start to finish?
Quick One Auto and Fast Bud #2 are among the fastest.
Are fast strains lower quality?
No — modern genetics maintain quality.
Are they good for beginners?
Yes — fast strains are often easier.
Fast growing seeds are perfect for growers who want:
Quick harvests
Lower risk
Efficient growing cycles
With the right genetics from Discount Cannabis Seeds, you can grow faster and smarter.
✍️ Author Bio - Molly Carter.
Molly specialises in fast-growing genetics and UK grow optimisation, helping growers maximise results in less time.