Heavyweight Seeds have around 25 high quality feminized and auto-flowering strains on offer currently.
They were established in 2008 in Spain from a collection of breeders who acquired truly exceptional clones from a local grower and began experimenting with these genetics.
A passion for producing strains with knockout potency, massive flavours, quick growth and stable, impressive yields was born and they officially launched their seed bank in 2010.
With a reputation for their rigorous breeding approach and adaptable and stable strains, they’ve created such potent and high yielding strains as 2 Fast 2 Vast Auto, Budzilla and Champion as well as flavourful and resin rich strains like Strawberry Cake.
Continuing to evolve and bring out truly excellent feminized and auto-flowering varieties, it’s worth keeping your eye on Heavyweight as we’re sure their strains and what will come next will knock your socks off!
We’ve got the full Heavyweight range available here in Seed City at knock-down prices and with all available as both single seed options and full packs!
We’ve also got our super stealthy worldwide delivery which will have them with you in no time at all!
Seed City is the best source of cannabis seeds online! Over 6,000 strains from the top breeders worldwide; filtered by over 100 types and at the lowest prices you'll find!
All seeds sold are strictly considered for souvenir, collection and/or preservation purposes only, to preserve valuable genetics in case the laws change. Seed City does not want to induce anyone to act in conflict with the law and cannot be held responsible for those who do.
SaveSavedSave to wishlistSaved to wishlistAdded to your wishlistRemoved from your wishlistYour wishlist is fullCould not update your wishlist. Please try again.View wishlistSign in to save this to your wishlistCreate a free account or sign in and we’ll add it for you.Sign in / Register
Auto SeedsSave 15% across the entire Auto Seeds range.
Big Buddha SeedsSave 15% across the full Big Buddha range.
Big Head SeedsSave 15% across the full Big Head range.
Bomb SeedsSave 15% across the entire Bomb Seeds range.
Green House SeedsSave 15% across the full Green House range.
TasteBudz SeedsMassive 50% off the full TasteBudz Seeds range.
Terp Treez CoMassive 50% off the full Terp Treez range.
Humboldt Seed OrganisationMassive 50% off the full Humboldt Seed Org range.
Sweet SeedsUp to 5 free seeds with qualifying packs.
Ace Seed bankUp to 3 free seeds with qualifying packs.
Delicious SeedsUp to 5 free seeds with qualifying packs.
Pure InstintoUp to 2 free seeds with qualifying packs.
World of SeedsUp to 5 free seeds with qualifying packs.
Grounded GeneticsGet four free seeds with every pack purchased.
Conscious GeneticsBuy regular packs, get four OG Scotti freebies.
Ultra GeneticsGet two Cheesy Marmalade Toast seeds free.
Always Be Flowering GeneticsGet three premium feminized seeds completely free.
The Plug SeedbankGet two free Spumoni seeds with every pack.
Dank GeneticsGet two Lemonaid Sherb seeds free per pack.
Black Tuna SeedsGet two exclusive feminized Black Tuna seeds free.
Prolific Coast SeedsGet four KSMORZ regular seeds completely free.
Perfect Tree SeedsBuy any three-pack, get one matching seed free.
Seeds of AnarchyGet a random strain free with every pack.
Arcana CollectiveBuy feminized packs, get one Sour Cherry Kush free.
HortilabGet four or more Sour Power seeds free.
Rare Dankness SeedsBuy any regular pack, get a mystery pack free.
Subtotal:View basketCoupon codeApply codeApplying…Remove couponAdd codeCancelDiscount:After discount:CheckoutTotalFreeNo products in the cart.Decrease quantityIncrease quantityTap to pick — visit your cartChoose your 999999 free seedChoose your 999999 free seedsAdd 888888 more to unlock free seeds999999 Seed999999 Seeds999999 Single Seed999999 Single Seeds999999 Single Feminised Seed999999 Single Feminised Seeds999999 Single Regular Seed999999 Single Regular Seeds999999 Feminised Seed999999 Feminised Seeds999999 Regular Seed999999 Regular Seeds999999 Autoflowering Feminised Seed999999 Autoflowering Feminised Seeds999999 Autoflowering Regular Seed999999 Autoflowering Regular Seeds
Added to your basketAdded ✓999999 item999999 itemsCheckoutView basketKeep shoppingPick your free seedPick your 999999 free seedsPick 1 more free seed1 free seed999999 free seedsPick 999999 more free seedsYou’ve unlocked a free seed — pick it nowFree seed added to your basketAddYour free seed is in your basketYour 999999 free seeds are in your basket999999 of 888888 picked — free with your orderAdd 999999 more999999 of 888888 pickedAdding…Could not add that one — try anotherBasketRemoveFeminised seedsAutoflowering seedsRegular seedsCBD seedsClose