Allow a width of 8' for the average Blackberry. Some newer compact varieties can be planted closer (4') and even in pots and as self supporting. If this sounds more suitable for your requirements look at Waldo or Loch Ness
Blackberries are also ideal for training against walls, fences, sheds etc, and will provide a very useful crop on sunless walls where few other fruits will grow. Thornless varieties plant 8' apart, thorny varieties plant 10' apart. Himalayan Giant 15' apart. Loch Ness 4' apart.
PLEASE NOTE THAT ALL OF OUR BLACKBERRIES ARE VERY HIGH QUALITY IN ACCORDANCE WITH OUR GOLD HEALTH STANDARD AND GUARANTEE AND NOT JUST ROOTED TIPS! Most are supplied in containers, a few of the thorny varieties may be supplied as bare-root during the dormant season if this suits them best.