When To Plant Gladiolus Zone 9. The bulbs are hardy in zones 7 to 10. However you really should wait until March if you dont want to take any chances.
Jan 10 2017 Planting. Loosen the soil to about 12 to 15 inches deep and add in a 2-4 inch layer of compost. This will result in continuous blooms through early fall.
However you really should wait until March if you dont want to take any chances.
The last month that you can plant gladiolus and expect a good harvest is probably September. Or perhaps a pineapple lily will make you wonder at the world. You should start your planting of your gladiolus in mid-spring. Lilies amaryllis callas and gladiolus these are but a few common zone 9 bulbs but there are also some truly unique and crazy plants that will thrive in those regions.