Blackberries are easily spread when a new cane grows and the end arches back towards the ground. When the tip reaches the soil, it will begin to profusely grow new roots which will create a new plant.
Blackberries are also spread by animals. They will eat the berries and spread the seeds as they pass through their digestive system.
The Himalayan blackberry is from India, and it was introduced to North American via England in 1885.
It is a very invasive species that forms dense thickets that will shade out other understory plants.
I have been digging them up in the wetlands area to allow wildflowers like larkspur and bleeding heart to grow. New larkspur leaves can already be seen sprouting out of the ground!
