Too much nitrogen will cause plant to not set flowers.
Plant corms in spring as soon as ground is workable.
Try to aim for a seed spacing of at least 7.02 inches (18.0 cm) and sow at a depth of around 4.29 inches (11.0 cm).In colder climates corms will need to be dug up and stored, or treat plants as an annual.
Ensure that temperatures are mild (minimum night temperatures should be around 2°C / 36°F) and all chance of frost has passed before planting out, as Garden Gladiolus is a half hardy plant.These estimates for how long Garden Gladiolus takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Average 18 days | Min 4 days | Max 48 days (51)
Average 0 days | Min days | Max days (0)
Average 122 days | Min 80 days | Max 790 days (6)
From Latin: “a sword” referring to the long shapes.
Gladiola, Hybrid Gladiola, Sword lily, Corn flag, Gladioli, Gladioluses, Gladiolas, Gladdies, Glad, Glads
Gladiolar, Gladiolor
Misspellings: gladoliuos, Iridceae gladiolus hortulanus
1 http://www.aspca.org/Pet-care/poison-control/Plants/gladiola.aspx