If you get a decent pencil length of new growth, without a flower bud, it should strike in two weeks. That, sedum and pelargonim are the most reliable strikers I know of.
Give the cuttings a go. For me the only things that root quicker and easier than salvias are Tradescantia houseplants (I've taken to using them for foliage in hanging baskets for the summer) and Persicaria Red Dragon.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
It was so so easy - just snipped a bit off, stripped the lower leaves off and shoved it in a pot of compost!! 2 weeks later they had roots!! Such a willing grower that's for sure
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