I have around 25 Anne plants in two tubs right now. I have been giving them away like crazy. I had around 50 of them.
How? Root cuttings.
Dig up the entire plant when its dormant in early spring like you were going to transplant it. Trim the roots and plant each of those roots in a pot or where you want a new plant. I usually go with around 4-6 inch long roots… not sure how small you can go with success.
You can easily get 25 to 50 plants off of one root trim.
If you only want a couple or few plants then excavate the root area of your Rasp and locate how ever many plants you want and snip off a few roots and just plant those root cuttings or pot them up.
Last but not least. If you dont want to do any of that… take a shovel and spade around the plant about 6 to 8 inches or so away from the crown and wait for new root clones to form. And dig them up when you wish.
Remove the mulch around that area to a minimum for maximum results.
Are they getting enough fertilizer? Organics are best for cane fruits IMO. The Anne raspberry I planted late last Spring was a pathetic little thing and put on little growth. This year it has come in very thick, with many little suckers. Our soil is mostly silt and sand, with fir bark and compost worked in. If your soil is too heavy, it may be preventing them from spreading as quickly.
The black and gold raspberries are supposed to root from the tip, like blackberries. I believe layering is also a possibility. I have found that tip rooting is easy enough. You pin the tip to the soil with a piece of wire. Mulch and water, but not so much that it rots. Make sure you are trying to root a primocane, and not a floricane.
Im still not totally convinced. But yes we both failed… the only variable we didnt try is chill hours. Perhaps your roots were so far down that they did not get enough chill? Perhaps your mulch is so deep from the 20 yrs that they never pop up?
This thread has me still wondering. To this guy they are invasive.
IF there is a next time… i think u or I should try getting some root cuttings in the fall and putting them in the fridge.
I know with your double rosette that tip rooting will result in the same disease… the only propagation technique that nobody tries is leaf bud cuttings… im not sure if the disease will pass via that route.
I just did a leaf bud cutting on a purple rasp and its taking so far. But i did it way too late…so its iffy. If i can get the timing right this would be the way to go for mass propagating… you have to do it on the primocane. I think.
@krismoriah … I am wondering if Andrew actually had illini blackberries… or perhaps got some different variety as a nursery mixup.
Hard for me to believe that illini would be absolutely NOT invasive in zone 7a TN… but be very invasive in zone 5.
I got my illini in 2003 from Starks.
Not sure where or when Andrew got his. He mentioned 8 years ago… so think he got his much later than I did.
Ps… this spring… it warmed up nicely mid/late May… I planted okra… and just after it came up good a couple weeks later … we had a 3 weeks of cooler very wet weather.
My illini were blooming heavy during that 3 weeks of cooler wet weather.
That made the double blossom worse this year than ever before. Probably cut my berry production in half. Still getting some very nice berries… but less of them.
Think I will eventually replace them with something else… especially if I can’t find a way to propigate them and shed the doubleblossom/rosette.