One of the berries I grew this year was a thornless blackberry known as 'Chester'. Chester is meant to be one of the tastier and more cold hardy of the thornless blackberries.
Unlike some of the varieties of thornless blackberry such as Waldo, Chester is said to be relatively productive and tasty. Also unlike many varieties of blackberry it is legal to grow, sell, propagate, distribute etc Chester blackberries in NSW.
Unfortunately the heat hit at the wrong time and we lost most of the berries, hopefully next year when the plant is larger we get a larger crop. They do taste good, but I far prefer my thornless youngberries.
Days to maturity Thornless Chester Blackberry (Rubus fruticosus species aggregate)
Seeds planted N/A grown from divisions
Flowered 26/11/2017 Day 0
Fruit Ripe 06/01/2018 Day 41
I have added this to a larger list of vegetable days to harvest from seed.