Question
i planted 2 iris's last yr.  they both bloomed.  this year they got bigger, lots of leaves, but no buds/flowers at all.  what happened? they are in a morning/late afternoon sunny spot.  thanks, lisa

Answer
Your Irises are Bearded or Beard-less?

Beard-less Irises thrive in soil rich in Nitrogen; Bearded Irises on the other hand will languish, sending up foliage with no flowers until you fix it.

There is still the matter of Sun.  It's likely your Irises need more of it.  Morning Sun plus late afternoon Sun is not a full day of Sun exposure.  They are missing the most intense rays of the day.  These are plants that are always happiest under the brightest footcandles.  If you can adjust their location and get them more Sun, you might find blooms on them next year.

Finally, a dose of Bone Meal in the soil will slow-release Phosphorous to build strong, large, bright Iris flowers.  If you are using chemical fertilizer, make sure it is not a high Nitrogen type -- the first number on the side of the box, N-P-K, unless you have Beard-less Irises growing.

Thanks for writing.  Keep me posted on this.