I have 2nd year Centennial and Cascades coming back full force. I have a Cascade that is already over 7 feet tall. It is a beast.
My question is, moving forward, should I look to "thin" out the crown next year? If so, should that be done in the fall when I am finished letting the leaves feed the crown or in the spring, early, before new shoots come up? Both the Cascade and Centennial (which is also pushing 6 feet) had shoots coming up about a foot away from the main part of the crown.
There were about 25+ shoots coming up from each crown. I trimmed back all but 5 or 6, sending 2 or 3 up each string. On one crown, I have a total of 5 bines. Is that too much? Should I have trimmed back more?