Crocosmia

Crocosmia is a genus of perennial bulbs in the Iridaceae (iris) family native to South Africa.  The genus name Crocosmia is derived from the Greek words for 'saffron' and 'smell' because the flowers emit a subtle scent that will increase when the dried stems are soaked in hot water.  

It performs best when planted in full sun.  In hotter climates, some afternoon shade will allow the blooms to last longer.  Locate in an area that is also protected from hot, dry wind.  Water to maintain even moisture in your soil, once per week in the growing season should be sufficient.  

The flowers begin to open at the bottom of the spray, and continue to open in succession from the bottom upwards.  When planting in a container, crocosmia fills the 'thriller' portion of a 'spiller', 'thriller', and 'filler' arrangement.  Ensure that proper drainage is provided when choosing a container.  

After blooming, cut the stems back to where they meet the leaves.  This will help promote new blooms.  Allow the leaves to remain, as they will provide energy into the underground bulb to ensure blooms in the next year.  Once the leaves wither and die, cut to ground level.  

Propagation is done through division, and should be performed in the early spring every 3 to 4 years to prevent overcrowding and aid in flower production.  Over time, they may become invasive, however, there are varieties that are considered less invasive.  When grown in the optimum hardiness zones, the bulbs can remain in the ground for the following year.  In cooler zones, the bulbs can be dug up, cleaned, then stored in a cool dry location to be planted the next spring after the chance of frost has passed.  Allowing the soil and outside temperatures to warm up before planting will make the bulbs sprout quicker.  Plant to a depth of 5 in. (12.5 cm).  Semi-hardy, injured below 28 degrees F (-2 degrees C).  

Insects, Diseases, and Other Plant Problems:  Spider mites can be an issue, however, hosing the foliage down with a strong spray from your hose will help to dislodge the mites and make the environment unattractive.