A Guide On When To Harvest Cannabis GreenPlanet Nutrients Canada Will Soapy Water Hurt Ladybugs? Garden Sprayer Spray Bottle Sprayer Outlet Step by step to collect rose seeds! , 1.) Cut open your rose hip using scissors or a knife. You can soften hips by soaking in water prior to cutting. Dont worry about cutting the seeds, they are Amazon.com : CEMEHA SEEDS Black Mustard Seeds Non GMO Vegetable for Planting 500 Seeds : Patio, Lawn & Garden