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Every plant starts as a seed. Large scale hemp production is not possible without a consistent high-quality seed supply. Boulder Hemp has been breeding seed lines in Northern Colorado since 2014, using traditional breeding approaches and cutting-edge plant genome analysis methods–making us one of the most advanced hemp research and development programs in the world.


10 Seeds Per Pack

For larger quantities, please email us at

*Available to ship to Canada. To order, please email us.



The San Cinco hybrid system is the result of selection for resistance to the windy summer storms of Colorado and certain types of insect pests. Although these stout plants are bred to survive, yields are also excellent for Colorado field grown plants and can exceed 2 pounds of dry flower that will contain 10%–15% CBDA. In Northern Colorado these plants begin to flower in the last days of July and early August and should be harvested before the first hard frost.


Boulder Hemp is releasing select high-yield feminized seed batches. Our hemp seeds can be started in the greenhouse about 28 days before field transplant date, or can be directly sown outside in appropriately prepared soil after the last frost.

  • All seeds are free of Y chromosomes, meaning more than 99% of mature plants will express only pistillate flowers.
  • All seed batches are tested for germination rates.

San Cinco Hemp Seeds

  • We take customer satisfaction very seriously. All of our products are tested for quality and all shipments are carefully inspected before leaving our warehouse.

    Please check your shipment carefully upon arrival to ensure it has not been damaged during shipping. All claims for damaged product must be made within 72 hours of receipt of your package. Please contact us and provide detailed information if your product was damaged during shipping at with your order number and “Damage” listed in the subject line.

    GENERAL REFUNDS: Boulder Hemp offers a 30-day 100% satisfaction guarantee for our products. If for any reason you are unsatisfied with your purchase, you may return the unused portion for a full refund less any shipping and handling. To request a refund, please contact our customer care at with your order number and “Refund” in the subject line.

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