Blackberry

I grew a Thornless one years ago - it was awful. Never formed a proper blackberry - just a mass of little bobbles and bristles - never ripened.
However, I've just bought a YS one from Morries so ask me again in a couple of years.
Have you tried cooking the blackberries and straining them through a jelly bag afterwards. Or tell P to take his teeth out when eating them so the pips can't get stuck anywhere. (Sorry P. Sometimes I can't help myself)

I like it. I will relay your message to P. I may not be able to relay back his reaction

I do cook the blackberries with sugar then sieve them, pushing the pulp through the mesh. I think it's  my desire to get every last bit of mush through the sieve that takes the timeand effort.