I have just cut back salvia microphylla 'Hot Lips' and salvia microphylla 'Trewithen Cerise' and am now worried that I should have waited until new growth emerges in te spring. Are they doomed or can I wrap them in e.g. bubble wrap and pray?
Ideally, you should have left the top growth on, but l wouldn't advise wrapping them in bubble wrap as this will just trap moisture and lead to rot.
Are they in the ground or in a pot ? Whereabouts in the UK are you? Just a rough location will do.
If they are in a courtyard garden, l'm guessing it's pretty sheltered. Personally, l would move the one in the pot close to the house wall if you can, or at least "a" wall, and make sure it's off the ground on pot feet or bricks so that it drains.
The one in the ground will have to take it's chances, but if the soil is well drained that will help. Fingers crossed !
Did you cut them right down to the ground, or are there still a few inches of stem left ?
If you remember, let me know how it goes !