Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on June 18, 2011
It is either not enough phosphorus or you have thrips. These articles will help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-thrips.htm
https://www.gardeningknowhow.com/ornamental/bulbs/gladiola/gladiola-disease-pests.htm
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