It’s not possible to know exactly what happened, but there are a few possibilities. Irises do not bloom every year. If you took irises from one area that only ever bloomed purple and replanted them elsewhere, you could have unknowingly planted another kind of iris that didn’t bloom or hadn’t bloomed in a long time. All of the colored irises may simply not be blooming this year, while the new kind are blooming. The other kind of irises should bloom in future years. To reduce the chances of more white ones spreading, deadhead the flowers and throw them away.
Hi Suzanne,
It’s not possible to know exactly what happened, but there are a few possibilities. Irises do not bloom every year. If you took irises from one area that only ever bloomed purple and replanted them elsewhere, you could have unknowingly planted another kind of iris that didn’t bloom or hadn’t bloomed in a long time. All of the colored irises may simply not be blooming this year, while the new kind are blooming. The other kind of irises should bloom in future years. To reduce the chances of more white ones spreading, deadhead the flowers and throw them away.