Asexual propagation

[mister_me]

I just bought some thornless blackberry vines for my backyard. The label states that asexual propagation (I assume cloning) is illegal for this specific plant.

Can anyone tell me why?

[Q.E.D]

Many hybridizers now patent their selections. When a plant patent is filed, it is illegal for anyone to propagate the plant for 17 years without written permission from the patent holder.

From this article on asexual propagation methods.

[Mangetout]

I don’t know if it varies regionally, but I thought that the propagation ban only covered propagation for resale/distribution and that the gardener was permitted to propagate for own use.

(it’s pretty near impossible to prevent a blackberry plant from propagating vegetatively).