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By section 6 of the Misuse of Drugs Act 1971 it is an offence to cultivate any plant of the genus cannabis in the United Kingdom without a license from the Secretary of State. Anyone committing an offence contrary to this section may be imprisoned or fined, or both. Please note therefore that germination of seeds bought from the Seedsman website without an appropriate license is illegal in the United Kingdom.
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420 2025 (UK) Promotion Terms & Conditions Promotion Duration: 4th April 2025 – 28th April 2025 11:00am GMT

Up to 30% Off Offers: 

  • Up to 30% Off Offers: The "up to 30% off" discount applies only to the specified strains and pack sizes listed below (referred to as "Eligible Strains") for the 420 Promotion 2025.  
  • Automatic Discount: The discount will be automatically applied at checkout when an eligible item is selected.  
  • Eligible Items: Items eligible for this promotion will be clearly marked with a yellow "% OFF" label on our online store.
  • If your discount does not automatically appear in your cart, please contact Customer Service before completing your purchase.  

General Terms: 

  • Promotions are valid while stocks last.  
  • Seedsman does not allow the combination of discount codes on orders at any time, nor the combination of discount codes with "% OFF" offers (loyalty/reward points can still be used as normal). 
  • Seedsman reserves the right to amend or withdraw promotional offers at any time. 
  • This promotion is subject to change or cancellation without prior notice. 
  • Seedsman reserves the right to disqualify any participant found to be in violation of the terms and conditions. 
  • The free seeds are subject to availability and may be substituted at the discretion of Seedsman. 


420 Weekend – Terms & Conditions Amendment 
Get an EXTRA 10% OFF – 18th–20th April ONLY Use coupon code: 420-EXTRA-10 at checkout 

This exclusive extra discount applies to selected strains from the following breeders: 
Seedsman 
Fast Buds  
Royal Queen Seeds (RQS) 
00 Seeds 

These breeders already have 30% OFF, so you save 40% in total with the code. 
Important: Only eligible strains listed below are included in this promotion. 
The EXTRA 10% will apply on top of existing 30% OFF deals for these strains. 

420 2025, Eligible Strains: 

Seedsman – 30% OFF the below strains and pack sizes: 

Banana Biscotti F1 (3/5/10 Packs) 
Banana Jealousy (3/5/10 Packs) 
Bubba Cheesecake (3/5/10 Packs) 
Cherry Punch F1 (3/5/10 Packs) 
Cookie Apple OG F1 Auto (3/5/10 Packs) 
Gelato 41 BX (3/5/10 Packs) 
Ice Dream Cake (3/5/10 Packs) 
L.A. Peyote Kush (3/5/10 Packs) 
Peyote Gorilla (3/5/10 Packs) 
Pineapple OG (3/5/10 Packs) 
Pineapple OG Auto (3/5/10 Packs) 
Purple Ghost Candy (3/5/10 Packs) 
Purple Punch F1 Fast (3/5/10 Packs) 
Sour Diesel Auto (3/5/10 Packs) 

Humboldt Seed Co – 30% OFF the below strains and pack sizes: 

California Octane (5 Packs) 
Donutz (5 Packs) 
Garlic Budder (5 Packs) 
Gazzurple (5 Packs) 
Golden Sands (5 Packs) 
Guzzlerz (5 Packs) 
Jelly Donutz Auto (5 Packs) 
Jelly Donutz (5 Packs) 
Orange Creampop (5 Packs) 
Strawberry Cheesecake (5 Packs) 

00 Seeds – 30% OFF the below strains and pack sizes: 

Biscotti Zkittlez (3 & 5 Packs) 
Blue Dream Auto (3 & 5 Packs) 
Blue Dream Fast (3 & 5 Packs) 
Blue Dream (3 & 5 Packs) 
Blueberry Auto (3 & 5 Packs) 
Blueberry Fast (3 & 5 Packs) 
Blueberry (3 & 5 Packs) 
Bubba’s Gift (3 & 5 Packs) 
00 Kush (3 & 5 Packs) 
Afghan Mass Auto (3 & 5 Packs) 
Afghan Mass XXL Auto (3 & 5 Packs) 
Bubble Gum XXL Auto (3 & 5 Packs) 
California Kush Auto (3 & 5 Packs) 
California Kush Fast (3 & 5 Packs) 
Cheese Berry Auto (3 & 5 Packs) 
Chocolate Skunk Auto (3 & 5 Packs) 
Chocolate Skunk XXL Auto (3 & 5 Packs) 
Critical Poison Fast (3 & 5 Packs) 
Do-Si-Dos Cookies Auto (3 & 5 Packs) 
Do-Si-Dos Cookies Fast (3 & 5 Packs) 
Do-Si-Dos (3 & 5 Packs) 
Gelato Mint (3 & 5 Packs) 
Gorilla Auto (3 & 5 Packs) 
Gorilla Fast (3 & 5 Packs) 
Gorilla (3 & 5 Packs) 
Grand Daddy Purple (3 & 5 Packs) 
Harelquin CBD (3 & 5 Packs) 
Lemon OG Auto (3 & 5 Packs) 
Lemon OG (3 & 5 Packs) 
Mimosa Auto (3 & 5 Packs) 
Mimosa (3 & 5 Packs) 
Purple Punch Auto (3 & 5 Packs) 
Purple Punch (3 & 5 Packs) 
Rainbow Mints Auto (3 & 5 Packs) 
Rainbow Mints (3 & 5 Packs) 
Sweet Critical 2.0 (3 & 5 Packs) 
Sweet Critical Fast (3 & 5 Packs) 

Fastbuds – 30% OFF the below strains and pack sizes: 

Gorilla Cookies (5 Pack) 
Strawberry Gorilla (5 Pack) 
Banana Purple Punch (5 Pack) 
Lemon Cherry Cookies (5 Pack) 
Purple Lemonade (5 Pack) 
Gorilla Zkittlez (5 Pack) 
Gorilla (5 Pack) 
Ztrawberriez (5 Pack) 
Gelato (5 Pack) 
Guava (5 Pack) 

Barney’s Farm – 30% Off the below strains and pack sizes: 

Amnesia Lemon (5 Pack) 
Biscotti Mintz (5 Pack) 
Lemon Tree (5 Pack) 
LSD Auto (5 Pack) 
Purple Punch x Lemon Drizzle (5 Pack) 
Runtz Muffin (5 Pack) 
Sour Strawberry (5 Pack) 
Tangerine Dream Auto (5 Pack) 
Watermelon Zkittlez Auto (5 Pack) 

Happy Valley Genetics – 30% OFF the below strains and pack sizes: 

Baller’s Game (6 Pack) 
Candy Games #38 (6 Pack) 
Oh My Thai Auto (6 Pack) 
Pineapple Daddy Auto (6 Pack) 
Pineapple Diesel Auto (6 Pack) 
Shortcut Auto (6 Pack) 

Sweet Seeds – 30% OFF the below strains and pack sizes: 

Black Muffin F1 Fast (5 Pack) 
Bloody Skunk Auto (5 Pack) 
Crystal Candy F1 Fast Version (5 Pack) 
Diablo Rojo XL Auto (5 Pack) 
Gorilla Girl F1 Fast (5 Pack) 
Green Poison F1 Fast (5 Pack) 
Green Poison (5 Pack) 
Killer Kush F1 Fast Version (5 Pack) 
Orange Apricot Glue XL Auto (5 Pack) 

Royal Queen Seeds – 30% OFF the below strains and pack sizes: 

Alien OG Fem (5 Pack) 
Fat Banana (5 Pack) 
Granddaddy Purple Auto (5 Pack) 
Pink Gorilla (5 Pack) 
Pink Mist Auto (5 Pack) 
Pink Mist (5 Pack) 
Pink Runtz (5 Pack) 
Purple Lemonade Auto (5 Pack) 
Tropicana Cookies Purple (5 Pack) 


G13 Labs – 25% OFF the below strains and pack sizes:

Apple Crumble (5 Pack) 
Banana Latte (5 Pack) 
Frozen Afghan Mintz (5 Pack) 
Jealous Mary Auto (5 Pack) 
Runtz 13 (5 Pack) 
Tropical Punch (5 Pack) 

Greenhouse Seed Co – 15% OFF the below strains and pack sizes: 

King’s Juice Auto (5 Pack) 
Milky Dreams (5 Pack) 
Exodus Cheese (5 Pack) 
Chemical Bride (5 Pack) 
Pure Kush (5 Pack) 
Exodus Cheese Auto (5 Pack) 
Franco’s Lemon Cheese (5 Pack) 
Black Toffee Auto (5 Pack) 
Chemdog (5 Pack)