In the past my perenials die during the winter and I have to replant in the spring. Is there some way to save the perenials?
My soil is very dry with very good drainage in the summer. The soil has a lot of clay with a lot of lime stone and I have added about 50% compost to the soil. Nothing much will grow here but the herbs. It gets full sun about 60% of the day. In the summer it is very hot and dry and the herbs do very well here. In fall, winter and spring we have lots and lots of rain. We rarely get snow but it does get down in the 20s at night then 40s and 50s during the day.
My butterfly plant lived for 3 years here and died. I planted another butterfly plant and it lived 4 years and died. Other perenials ususally never come up the following spring.
Sweet potatos do very well here.