Hmm. Good question! I’m not a botanist, but here are my thoughts. Raspberries do not ripen once picked. If the berries were still attached on a branch, but that branch did not have access to nutrients etc. from the main plant, it is unclear whether they would indeed continue to ripen. Would the branch have enough of what the berries needed to mature? It would be a good experiment! You might try a few branches, but otherwise, you can try covering your bushes with garden frost blankets overnight, and perhaps protect the base with a thick layer of straw. Good luck!
Hmm. Good question! I’m not a botanist, but here are my thoughts. Raspberries do not ripen once picked. If the berries were still attached on a branch, but that branch did not have access to nutrients etc. from the main plant, it is unclear whether they would indeed continue to ripen. Would the branch have enough of what the berries needed to mature? It would be a good experiment! You might try a few branches, but otherwise, you can try covering your bushes with garden frost blankets overnight, and perhaps protect the base with a thick layer of straw. Good luck!