That freedom blackberry is huge! Looks awesome.I am not a fan or store bought blackberries,all suger and too watery for me,I grew up in picking wild blackberries,I have a patch about 10fy by 3ft dedicated to blackberries,what I do is just dig them up when they pop up around the place,the dense planting keeps most of them as smaller plants but they are hugely variable,some are monsters and just want to grow,others not so much,the fruit is very variable too,some gain a good size and retain more of a tart-sweet flavour and more seed crunch,more to my taste.Im thinking I might just select out the best and pull up the others,especially the aggressive growers,they just throw up new plants from the roots all over the place right through the strawberries, currants,raspberries etc a real PITA(the raspberries do a good job of crowding them out though,they sucker like crazy as well).
Your patch looks great,so neat for blackberries,are they naturally bred to be small plants and do they not sucker? Or are you just proper on top of the pruning and removing suckers?