How to easily propagate your blackberry plants using suckers. Blackberry plants will send out roots under the soil that will spread out and send up suckers. These are new blackberry plants that will begin growing in that area. If they come up in an area that is good for your row or garden then you’re all set! If they pop up outside the row or garden then you have a few options. 1. Dig them up and transplant to another area of the row or garden. 2. Transplant them to a pot and grow them in containers. 3. Give them away to family, friends or neighbors. I’ve found tip layering to be the most successful way for me to propagate blackberry plants. Below listed in order are the ways I find to be most successful for propagating blackberries: 1. Tip layering also called tip rooting. I do this most often and it is very simple. Place the tip of a cane in a small cup or pot and cover it with soil. In 4 weeks you can cut it from the main plant and hand it to someone el...