Back in April 2020 I received 4 Natchez blackberry plants and built a small raised row down my fence line and planted them. They have done very well since then. Growing from only 4-6 inch small plants to today being over 6 feet tall!
They have side shoots and other canes that are reaching over down to the ground and ready for propagation by tip layering. If the tip of the cane touches the ground they will start growing roots and you will have a new blackberry plant that you can then separate from the vine and transplant someplace else or give to a neighbor. September 29th, 2020 here they are bending side to side but 2 are still over 6 feet tall and the other 2 are over 5 feet high.
Start by selecting a shoot or cane that can easily be brought to ground level and into a pot. Fill the pot 1/2 full with good quality soil and then take the cane and trim off the leaves near the end.
Place the tip into the pot.
Back fill the pot with more soil to hold in place.
I had several canes that were good candidates for tip layering so I ended up doing 7 pots that I will replant and share a few with friends.