I think those are both herbaceous types rather than shrubby ones. If they have lots of stems/shoots coming from ground level rather than a woody framework, you might be better dividing them in spring (just as they start to grow) if the cuttings don't make it.
Thanks Jenny, yes they're both herbaceous not woody. I'm not depending on the cuttings in any way (though it would be a bonus to get some new plants) - this is more an experiment to see if I can do it for future years.
The more you practise, the easier it all becomes @borgadr, and it'll soon be second nature. Can't help you much with the salvias - I'd need to do cuttings every year with them to ensure I had viable plants. They don't really suit our climate here.
I'm too lazy for that...and I don't like them enough to do it anyway
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
@borgadr don't worry you're not the only one to struggle with cuttings - I'm absolutely hopeless! The annoying thing is, things that I casually stuff in a pot and ignore often strike, but the plants I faff over, very often don't! I even bought a heated propagator to see if that increased my strike rate, but all it seems to've done is increased the speed of 'crispiness'. I will keep doing it though, the few successes are very satisfying
Yes, it's worth a try. @B3 suggested the same. I'll maybe give it a go this weekend. Would I just leave them in a jam jar in the greenhouse then pot them up when I see roots?
Incidentally, once winter comes, assuming the cutting has struck, should I then expect the cutting/plantlet to die back for a few months the same way as its parent would?
Yes, but change the water every few days — good luck!
At this point, I would probably keep the potted up cuttings indoors or in a greenhouse, but I suppose it would depend on the plant and where you are in the UK.
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Can't help you much with the salvias - I'd need to do cuttings every year with them to ensure I had viable plants. They don't really suit our climate here.
I'm too lazy for that...and I don't like them enough to do it anyway
I live in west central Scotland - not where that photo is...
I will keep doing it though, the few successes are very satisfying
I had 7 out of 8 salvia ‘Amistad’ cuttings strike in water for me this spring.
https://forum.gardenersworld.com/discussion/comment/2398663#Comment_2398663
Incidentally, once winter comes, assuming the cutting has struck, should I then expect the cutting/plantlet to die back for a few months the same way as its parent would?
At this point, I would probably keep the potted up cuttings indoors or in a greenhouse, but I suppose it would depend on the plant and where you are in the UK.