gladiolus

Question

Why don’t my 5 year old gladiolus bloom?

Answer 1

If the corms are too small (less than 3/4 inch) or unhealthy the plant will be unlikely to bloom. These articles should help:

https://www.gardeningknowhow.com/ornamental/bulbs/gladiola/getting-gladiolus-to-bloom.htm
http://www.extension.umn.edu/garden/yard-garden/flowers/growing-gladiolus/