Is there a way to set some items (or activators, like ore veins and ingredient plants) to respawn on a regular basis, even if the cell itself is marked as no respawn?

There's a (new) SKSE function for Plants ... but I don't know if it will do what you want? http://www.gamesas.com/topic/1404470-resetrespawnregrow-floratreesplants-in-a-noresetzone/page__p__21435777__hl__skse%20respawn%20plants__fromsearch__1#entry21435777


And not as far as I know for the Ore and other items.

Is that SKSE function for plants available? The latest SKSE I can find is from August 4th.

I don't know, I've not checked. But from the post on the topic, it would appear so?