So I'll ask here, what/when is the point that you have a newly propagated plant that you can dig up to transplant as a self-sustaining stand alone plant? I see roots on the tips that I dig up, but how do I know I can snip it off and call it a new vine? Am I over-thinking this? By the way, boysenberries truly rock!

These were the last of the season for me back in July:

I would bet you could do all this much earlier in the process, say when there are multiple 1" new roots.

Most caneberries, once lateral growth has stopped, will tip root into any exposed somewhat soft soil, no need to bury; perhaps just staple down in the desired spot.

raspberries

easy

My Allen black raspberry threw out 11 primocanes from the crown. Wow! I removed 2 weaker ones. The nine remaining are huge canes! This one plant will produce hundreds of black raspberries next year. Nice and neat too, the lateral branches are all at the top of the plant. So easy to trellis them. The canes are 7 foot tall. They need no support, they grew straight up into the air. Laterals formed at between 5 and 6 feet. many went to the ground and rooted. I cut them, removed roots and tied them to the trellis. Some laterals are 6 feet long. It well may produce 1000 berries. Hard to tell? Last year three canes produced about 100 each, and now I have 9! A very impressive plant!

I know one person wants a wyeberry, if any others do, let me know now so i know how many plants I need to make.

I have a Boysenberry too! That's Burbanks cultivar right?
I have "Burbank's white" blackberry too. It still rather young.
I should get some fruit next year.
I heard Marionberry is better, I have one of those too, I just obtained one this fall. Hope it makes it!

Here is one cane of Allen. It has clusters of berries with at least 7 berries in each cluster, and I can see about 13 clusters, so that's 91 berries there. Some clusters have 10 or more berries. If you go to photobucket and expand the picture (click on image) you can see a lot better. Looks like at least 15 clusters. The plant is going to have 1000 berries easy next year with 9 canes! Maybe even as many as 1500. One plant, very nice!
Where the heck next years promocanes will have room on the crown is beyond me? Maybe it will only throw out three canes next year, we will see how it goes.

Here's another cane running to the right across a sea of red raspberry canes. Notice the blueberry at the bottom. Easier to see on photobucket. Yes it was a good year for raspberries here! Sorry a little off subject, but these plants tip root too, so just thought I would show you guys. I had about 7 tip rooted laterals I pulled of the ground on this plant this year.

Mr. Boysen may have known Mr. Burbank.