I am trying to grow a bunch of gladiolus for my upcoming wedding on Sept 21st. Can anybody provide some insight on how well gladiolas grow in the PNW. I am located in Auburn, Wa (zone 8a) and most info says they will bloom in 75-90 days. I am wondering in our weather if that still holds true. The soil they are going in is good quality and they are going to get 6 hours full sun everyday from 10am to 4pm the rest will be partial-sun and shade.

I have 110 Green Star, 108 Plum Tart, 90 random purple (from hollandbulbfarm), and 90 random white (from hollanbulbfarm). My plan was to stagger plant them so the projected bloom date will be Sept 16th 5 days before the wedding so the buds should be mid way in flowering. So i would plant 40% on June 9th (90 days out), 40% on June 26th (82 days out), and 20% on July 4th (75 days) out).

How long will the flowers last on the plant if they bloom early (i am guessing 2 weeks), is 90/82/75 days to bloom realistic in this zone, and is targeting a bloom time of 5 days before the wedding about right? Anybody have any insights into timing gladiolas?