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Old School Breeders Association
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Old School Breeders Association, Monster Breeders, and Reeferman Genetics offer a wide range of fine cannabis seeds in a price range that can suit any budget.
AddressMelrose Avenue, California, 90011
Phone+1 (855) 425-3437

Old School Breeders Association, Monster Breeders, and Reeferman Genetics source, select and develop only the finest medicinal cannabis strains.  We provide rare and unique land race qualities for growers seeking the World’s Best Cannabis seeds.


All seeds purchased through OSBA are backed by an uncompromised ONE HUNDRED PERCENT SATISFACTION GUARANTEE.

Guaranteed World Delivery

Knowledgeable Service

+90% germination

+60% female seeds

Old School Breeders Association, Monster Breeders, and Reeferman Genetics™ have been delivering on their promise of only the best cannabis seeds to thousands of growers for decades. We are real growers with a passion for developing and breeding only the finest medicinal cannabis genetics. OSBA offers a wide range of genetics, from exotic land race Sativas to Extreme Potency Kush strains to High CBD selections — with a huge offering of excellent creations on everything in between.


OSBA prides itself in the collective knowledge we are able to share from our wide ranging strain base. If you would like help selecting a strain that’s right for you or your garden, reach out to us. Call us TOLL FREE from anywhere in North America , from outside N.A. or email us. We can be reached during regular and extended business hours for shipment updates or questions. Your order is shipped out the SAME DAY in most instances. 

Call anytime, Toll-Free at 855-425-3437
Email with any sales related inquiries.