Just discovered that my iris are infested with borers; they did not bloom well despite lots of buds this spring, and now they have "worms" on the roots, appear to be water-soaked, etc. Can I remove all the plants, treat the soil soon, and still plant new rhizomes before fall? Or what do you suggest? Thank you!~
Allegheny County Pennsylvania
This Question is Waiting for an eXtension Answer
What's an eXtension Answer? Your questions are answered by Cooperative Extension and University staff and volunteers from across the United States. That means the answer given here will be objective, research-based and credible.