The Salvia family is a beautiful one. We’re slowly but surely planting a large range of them in our garden. My current favourite is the Mexican bush sage (Salvia Leucantha) – I love it for its vibrant purple flowers which come in autumn and winter, exactly when we need them (it gets a bit grey here around then). Every so often we’ll seen a brave bumble or honey bee feeding off them in this time of the year when most other garden flowers are sleeping – so its everyone’s friend.
We’ve planted them at the base of a row of native Hop bushes (Dodonaea viscosa) which will eventually be hedged tight, with all the prunings being fed to our goats.
How to prune
In order to keep this glorious colour and fresh looking foliage coming back again and again, you need to prune them *hard* once a year. All you need to do is cut all the one year old growth to the ground once you see their flowers dying and fresh, new shoots coming out of the base.
If you look to the base of the plant, you’ll see new shoots popping up next to the older shoots as seen above. Simply cut all the old shoots off at ground level. Because I wait for the shoots to come, I never have any bare ground. Below you can see a freshly pruned shrub in the foreground and an older one about to be pruned in the background.
Edit: A very helpful person on social media pointed out that they wait until there’s no risk of frost happening in their region before cutting the old growth out. So might not cut it until mid/late spring. We have a warm(er) microclimate in Hobart, close to the ocean, so don’t have serious frost issues.
How to propagate from cuttings
You’ll be left with *a lot* of vegetation. Instead of just throwing this in the compost or chook run, you can make many, many cuttings from it to grow more plants. Because you can never have too many Salvias.
To propagate salvia from cuttings, cut a piece of the hardwood from the old wood with 4 – 5 nodes showing. Nodes are the part of a plant stem from which leaves or roots emerge, often forming a slight swelling. Make sure you have a node near the bottom of the stem.
Strip all the leaves from stems. As you can see below, I’ll often leave one small leaf at the top to help photosynthesise. But if any of the leaves start to wilt and die, nip them off and don’t worry, the cutting will still strike :-).
You can then plant up to 5 cuttings in each pot. Once they start setting roots in the warmth of spring you can move them up into their own pots to grow nice and big before eventually putting them into the garden.
For this batch I made the potting mix out of 40% compost (but really you don’t even need this) and 60% coco peat (to hold onto moisture) as this is all I had available. I could have done the whole lot just in coco peat and it would have been fine as well. Usually you’d also put some sand in there for good drainage – but these are hardy cuttings that don’t need pampering.
And that’s it. I now have 65 Salvia Leucantha cuttings which will grow into vigorous bushes of glory. And no, that’s not too many – I will happily home them all throughout our garden.