A member of our community garden association has inquired about planting...
A member of our community garden association has inquired about planting blackberry plants. The plots are small so there is concern about the plants sending out runners and invading neighboring plots. I was informed that certain types of blackberry plants are non-invasive and do not send out runners. Is this true? For instance, are thornless blackberries one of these types?
District of Columbia County District of Columbia
True, thornless blackberries do not send out runners and you do not need to worry about it taking over the garden. The old-fashioned thorny blackberries were the ones that spread all over the place. The Thornless berries will require some pruning and will need a trellis support of some type.