I have gladiola bulbs and I know they are old - many are likely over 20 years old (no kidding). I faithfully dig them up every late summer, and replant them in or around April. The last 2 summers they only produced a few flowers, where before the flowers were plentiful. Could it be they have come to the end of their "shelf-life"? Any suggestions on how they could be saved, or reinvigorated, would be greatly appreciated. Thank you.
Is It Possible for Gladiola Bulbs to Expire?
Certified GKH Gardening Expert
Gladiola corms are most productive in the first 6 years of their life.
They often decline in flowering as they become older, so it is a good idea to save cormels to develop a continual supply of young, healthy corms.