I love my Dutch iris and I leave them in the ground to multiply. If you want to divide allow the foliage to turn yellow before digging - exactly like other spring bulbs.

Sunset zone 13 is safe for wintering. Wouldn't want them in moist soil during summer.

Thanks iris gal! Hmmmm. Our soil is always moist. The HOA (homeowner's association) keeps the sprinklers going night and day. Golf course. Soooooooo, should I dig them up when they turn yellow and keep them in some dry soil in the summer? I'd love it if they multiply!

Hmmmm..........I notice your name and if you have very sandy, fast draining soil they may be ok during summer. But........if you're in doubt, dig them after foliage ripens and store in a cool dark place until Sept. Or you could place them on top of the soil, covered with sand.

The problem with damp soil during the warm dormant time is rot.