Seed germination, sowing instructions for Hops. Humulus lupulus is easy to grow from seeds. A hardy perennial vine. This plant is a cold-germinator. Sow in very early spring or autumn. Or keep cold in a refrigerator: Mix the seeds with damp sand in a plastic bag. Close it and place it in your refrigerator for 5 to 6 weeks. After that take the bag out and keep it at room temperature. Check for sprouted seed daily.
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