janwax said:Of the new dozen, about 8 of them flowered this season. Is this normal?
I generally expect two out of three newly planted iris to bloom in their first spring, maybe three out of four in a really good year, so getting 8 out of a dozen seems about right. (this year, less than 20% of the new ones bloomed thanks to the winter we had). In California, you might reasonably have somewhat higher expectations, but I still wouldn't count on 100% bloom the first year.
Where you buy them from can make a difference, too. If you buy directly from growers, you'll generally get bigger, more mature rhizomes that are more likely to bloom that first spring.