Hello all,
here is my first forum post. I'm posting this here for subsequent readers because I've already had great frustration on this topic. Here are my experiences to propagate
autumn raspberries ( fruits already on the one-year shoots).
Although the raspberries and blackberries are strongly related, the propagation of raspberries via cuttings or by tying down has not worked for me.
Only the propagation via root cuttings or naturally sprouting roots has worked.
For propagation via root cuttings, I dug up a plant about 2 months before the last frost and carefully removed the strongest root. After that, I put the plant back in normally. I cut the root cuttings into 4 to 5 cm lengths and put them in compost, watering occasionally. After the last frost, I put the plants, which were about 5 cm tall, where they should go. These almost all survived. However, there were not yet fruits on the young plants.
For the propagation via shoots I let the shoots grow over the summer and transplanted them in the fall. These will be bigger in the first year than the self propagated plants. These have also grown very well.
In conclusion, after the first year, the sprouting plants look stronger than the root cuttings. However, if you want to propagate the plants very quickly, I can also highly recommend the root cuttings.
One possibility, which I have not yet tried, is to cut the roots near the raspberry, for example, with a spade. The roots remaining in the ground should then also sprout and lost even less fine roots. If someone has experience with this, happy to share once.
Cheers Nils
