Dutch Iris - sprouting

I have some dutch iris I planted a month ago that are coming up.   Last year I had all of my dutch iris fail.  They sprouted and would start growing then all died.   They were in a raised bed and since it can get to the 70's and 80's during the day in Southern California, I think the raised bed got too warm for them.   They generally will do well in my area because it does get colder in the winter and nights - (35-50  degrees).  I planted these in the ground so hopefully they will do better.  This variety is golden beauty.