Answer: You don't need to dig and replant your bulbs every year. In fact, if you leave them in the ground they will multiply and naturalize an area. As long as your soil drains well, the bulbs will be just fine in the ground.
Rust of gladiolus foliage can be controlled with a preventative fungicide in early spring. Be sure to cut and remove affected foliage in the fall and then spray the foliage as it emerges in the spring.
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