I'm getting mixed messages about what to do with my Dahlias and Salvias as winter approaches. Some folks recommend lifting the dahlias and storing them, while others suggest cutting them back and mulching them in the ground. The same goes for salvias—should I leave them out or bring them into a greenhouse? Last year, I left some dahlias in a pot, and they rotted, so I'm thinking I should definitely lift and dry out the ones in the ground, right? And for the tender salvias, is it better to take cuttings and grow them on indoors? I want to make sure I don't lose my investments, especially since these plants are quite mature now. I have a garden room that gets really hot when the sun's out, plus a garage without windows. I'm located in East Lothian, Scotland, and my varieties include Salvia Amistad (in the ground), Salvia Greggi (in large pots), and a few types of Dahlias both in the ground and in pots. Any advice would really help!
4 Answers
I'm from NE Scotland, too, and I've lost quite a few dahlias and salvias over the winter by not lifting them. The combination of freezing temps and wet soil is tough on them. Now, I focus on growing from seeds and cuttings to save money if things don't make it through. Honestly, dahlias are super easy to start from seed!
I lift my dahlias every year; I feel it’s safer that way. Plus, when I lift them, I can divide the big tubers and create more plants. Just be careful about how you store them—ideally in a cool, dry place!
Considering your location, it's best to bring the Salvia Amistad indoors. They need some warmth and won't fare well in the cold outdoors. As for dahlias, they thrive if you have well-drained soil. A heavy mulch can protect them from frost and snow, but if the soil gets too soggy, that’s where you can run into trouble. I’ve had mine in the ground for over a decade, and they do great as long as the drainage is good!
What conditions do the salvias need indoors? Should I just keep them warm and out of direct sunlight until spring?
I've had good luck leaving my dahlias in the ground for years without lifting them. After flowering, I cut them back and cover them with mulch for winter. With salvias, a little trim goes a long way, but you can also propagate them from cuttings if you’d like more plants. I’ve had a great experience with that! Just keep them trimmed back to encourage new growth when spring rolls around.
How much do I trim my salvias? Mine are still flowering after a month in!?
What’s your storage method like? I want to make sure I do this right!