Hi RedH,
Thanks for your question.
Most perennial Salvias are hardy. To be honest, I'm brutal with my Salvias. They all get the chop in February in the UK when the new growth is starting at the base. You can see this in my latest video with Salvia 'Caradonna' where I chop them back to the ground.
https://youtu.be/zLnxH1nEef0
How to prune a Salvia:
1. Hardy Salvias are best pruned late winter before new growth emerges. Salvia 'hot lips' and 'Caradonna' are good examples.

2. Using sharp secateurs cut back the brown crisped up stems.

3. Cut back the Salvia to 2-4 inches from the ground

4. Compost or reuse the cut back material
You can like Bob suggests wait until April then pick through the salvia removing anything brown and crispy. It depends on the size of garden and the time you have. Both methods will work. I just have too many plants to be that nurturing. They will respond well to both.
Check out my how to prune back herbaceous plants guide here which shows you lots of examples.
https://youtu.be/_-jYc-Ruu8o
If you're looking to add Salvias to your garden then Thompson & Morgan offer a huge variety which you can buy online here. (This is an affiliate link so if you do choose to buy receive a small commission that helps keep this blog free to use!) I hope that helps and welcome to the Garden Ninja community!
Lee
Hi RedH,
Thanks for your question.
Most perennial Salvias are hardy. To be honest, I'm brutal with my Salvias. They all get the chop in February in the UK when the new growth is starting at the base. You can see this in my latest video with Salvia 'Caradonna' where I chop them back to the ground.
How to prune a Salvia:
1. Hardy Salvias are best pruned late winter before new growth emerges. Salvia 'hot lips' and 'Caradonna' are good examples.

2. Using sharp secateurs cut back the brown crisped up stems.

3. Cut back the Salvia to 2-4 inches from the ground

4. Compost or reuse the cut back material
You can like Bob suggests wait until April then pick through the salvia removing anything brown and crispy. It depends on the size of garden and the time you have. Both methods will work. I just have too many plants to be that nurturing. They will respond well to both.
Check out my how to prune back herbaceous plants guide here which shows you lots of examples.
If you're looking to add Salvias to your garden then Thompson & Morgan offer a huge variety which you can buy online here. (This is an affiliate link so if you do choose to buy receive a small commission that helps keep this blog free to use!) I hope that helps and welcome to the Garden Ninja community!
Lee