You’ll likely soon be busy planting fall bulbs, so why not give your peonies and iris a simple fall clean-up now? Healthier plants will thank you with even more flowers next year.
PEONIES – Although peonies are generally care-free, they can be afflicted by powdery mildew and other fungal diseases. To prevent spores from overwintering, cut peony stems as close to the ground as possible, carefully bagging everything as you go, and discard in the trash instead of composting. For best results, do this earlier rather than later, before the leaves dry up.
IRIS – Fall is also the best time to control iris borers. Borers hatch in spring from eggs laid in fall on iris leaves and anything similar that’s close by. To destroy them, simply wait until after a good hard frost kills the adult moths and then (a) cut back all leaves to a couple of inches and (b) remove, bag, and trash – don’t compost – the clippings and any debris or mulch that’s near the plants.
Simple, right? And your plants will reward you!