Irises Did Not Bloom Last Spring- What Can I Do This Fall To Help Them Bloom This Spring?

Question

Bulbs seem to be large – do you break iris bulbs & gladiola bulbs?

Answer 1

Irises tend to bloom on and off. They also will slow blooming when overcrowded, there is too much shade, insect invasion, or the rhizomes are covered (they like to bask in the sun). This article should help:

https://www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plants-not-flowering.htm