Dividing Bearded Iris in August: Perfect Timing

August is an ideal time to divide bearded iris—anytime between the last bloom and first frost works. Dig clumps carefully with a spading fork, shake off soil, and discard any rhizomes that are dry, rotted, or diseased.

Replant in a sunny bed amended with plenty of soil conditioner. Rhizomes should sit barely below the surface after watering in. No need to trim the leaves. You'll be rewarded with spectacular blooms next May.