Black Satin Blackberry - Only 1 New Cane
I have a Black Satin Blackberry plant that looks pretty healthy, but it only has one new cane (I think called primocane). I got the plant this year and it has about 4-5 second year canes (floricanes).
I'm concerned that there is only one new cane for next years berry production. Will more continue to grow throughout the summer?
Should I prune the tip of the new cane? It's much taller than the canes that are fruiting now. Will that encourage it to send up other new canes?