Gladiolus Changing Color - Knowledgebase Question

Cheboygan, MI
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Question by adelaide
August 5, 1999
All my beautiful glads have gradually gone to yellow blooms. Is there anything I can do to keep the original color?


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A comment from marysteeves2
September 23, 2023
After many years of pure and vibrant yellow glads (and stressful over wintering conditions), I am getting vibrant and rich maroon and very beautiful variagated orange blooms.


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Answer from NGA
August 5, 1999
As you know, glads grow from corms. The corms produce little offsets that eventually mature into corms large enough to support foliage and a flower stalk. When bulbs, corms or rhizomes remain in the same bed for a few years, the strongest hybrids gradually crowd out the weakest hybrids. As a result, you'll end up with a bed full of yellow glads (or purple iris), when you originally planted lots of different colors. The best way to keep this from happening is to dig and replant your corms every year or two, separating the offsets and planting them elsewhere until you know what color they are. Digging will enable you to take inventory every year or two, and to keep only those colors you really like and sharing the others with gardening friends.


Avatar for marysteeves2
A comment from marysteeves2
September 23, 2023
After growing the same rhizomes, originally yellow, in several different garden beds and allowing them to experience stressful winter conditions, and resulting in beautiful and healthy yellow glads, suddenly this year I have 2 healthy deep maroon plants and several variegated orange plants. I cant find any similar storiesthat go from weak to strong. I plan to keep them separate this fall and plant then separately in the spring and keep them in optimal conditions over the winter, hoping to keep the maroon and orange.

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