Rooting Salvias, and others...

I like plants that I can propagate. Whether it be division, seed, or cuttings, I take great pleasure in creating new plants and sharing them. I've talked a lot in past essays about the ease and joy of division. For certain perennials, particularly ones that spread like Monarda or mint, this is by far the quickest method for increase. But for others that form tight clumps or spread very slowly, rooting cuttings is my preferred method.

Rooting is particularly easy with Salvia, Hibiscus (& relatives), rosemary, Aster, and Buddleia. As I am obsessed with the genus Salvia, I'm always rooting them either for my own yard or to give away. You can never have enough Salvia, especially the ones preferred by hummingbirds.

Cuttings are easy. Just take semi-hard stems (the best ones aren't too woody, but also not flimsy and soft). Cut these off to about 5 inches. I then cut off the lower leaves and remove any floral buds that may be present. I only leave 2 leaves towards the top, and if the leaves are large, I'll cut them in half. With easy species like butterfly bush or salvia, I never use rooting hormone. They simply don't require it. Prior to taking the cuttings, I usually fill small containers, the smaller the better, with a well-drained sterile mix. A succulent mix is ideal. Never use garden soil because it will hold too much water, I've learned this the hard way! I then pre-water the containers and let them fully drain.

I then insert the stems (usually 3 of the same kind) into the corners of the pots. I use multiple cuttings to get better odds. At this point it isn't necessary to water them again, just make sure they have fully drained before you bag them. You then place the containers into large ziploc bags and seal them. I usually use one or 2-gallon bags. You then place the bag in a shady spot under a shrub or tree, ideally receiving dappled morning sun and afternoon shade. Be sure to stabilize these bags with bricks or rocks to eliminate the risk of blow over.

The next step is just waiting, in fact, you shouldn't ever need to water them as the humidity inside the bag will provide sufficient moisture. If it does rain hard, it may be important to ensure sure your bags remain upright and not weighted down by water. After 2 to 3 weeks your salvias should have roots, and at this point, you can open the bags and remove them. I prefer to take the containers out and just continue to let them grow in the pot until I plant them.

This method really works! I urge all my gardening friends to propagate and share their salvias this way.