For those who are trying to identify their blackberry type:
Most nurseries are selling the 鈥渆rect鈥 type. It has short sturdy canes that support themselves. The erect type is thornier and you can’t grab the stem. The stem is angular, not round. They are fairly winter-hearty with bigger fruit.
There is also a trailing type which has slender stems and prickles; you could still grab the branch. The stem is also round. Each leaf grows on alternate sides of the stem, and is made up of 3 leaflets (i.e. 3 smaller leaves). The leaves are roughly triangular shaped, are dark green on the top and bottom, and fall off during fall and winter. The trailing type isn’t very dense and will spread out over other plants; it’s best grown with a trellis.
For those who are trying to identify their blackberry type:
Note: There are also thornless varieties!