How to prune gladiolus 'impressive'

After flowering — deadhead as blooms fade, cut spike after all florets finish. Remove individual spent florets working up the spike, then cut the entire flower stalk to soil level when bloom is done. Leave green leaves intact until they yellow naturally.

Annually during the flowering season. Gladiolus 'Impressive' requires no traditional pruning but does benefit from deadheading spent florets as they fade up the spike. Once the entire spike has finished, cut it back to the base. Leave foliage standing until it yellows fully to nourish the corm before lifting or winter dormancy.

Remove individual spent florets working up the spike, then cut the entire flower stalk to soil level when bloom is done. Leave green leaves intact until they yellow naturally.