lilac & peony slow or dead? Spirea ?
I have a Sorbet and a Sarah Bernhart peony that are either dead or appear to be failing. Both are/were well established plants and upon digging, the Sorbet's roots still seem firm..... The Bernhart has shown some decline for a couple of years now. Is there anything I can do to revive my peonies? Also I have a Miss Canada Lilac bush that looked perfectly healthy and ready to bud out 3 weeks ago but for some reason, the older part of the shrub failed to leaf out. The lilac is probably 5 years old and was just starting to take off. The affected branches are not completely brittle and show some green when broken off. What could be the problem and what should I do? Trim back or just wait and see? Also last fall I cut to the ground an old spirea that was half dead and left the roots intact. There are now signs of new growth coming from those roots - will the shrub come back good as new or should I just dig it out and replace it? Thanks for any advice offered.