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Floret Size Classification

Gladioli are classified into five categories to indicate size. In the code, the first number indicates size. The diameter of the flower is measured as it grows normally without being flattened out in any way. This measurement is made on the bottom florets of the spike, which are generally slightly larger than those farther up.

Code Group Flower diameter
100 Miniature less 2.5” less 6 cm
200 Small 2.5” – 3.5” 6 - 9 cm
300 Medium 3.5”- 4.5” 9 - 11,5 (12) cm
400 Large 4.5” – 5.5” 11,5 (12) - 14 cm
500 Giant 5.5” or larger 14 cm or larger

The number 516, for example, indicates a giant-flowered gladiolus.

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