Swamp Rose Mallow (Hibiscus moscheutos)

The swamp rose mallow (Hibiscus moscheutos) is an upright shrub-like herbaceous perennial that is commonly found in moist areas such as marshes or lake shores.  It is a member of the Mallow family, Malvaceae.  This plant is unique because of its showy, tropical-looking hibiscus flowers.  The flowers are typically a large, beautiful, funnel shape with five separate petals.  Interestingly, the stamens and stigma are fused into one structure called a column. Petals are normally white, pink, or red with or some variation in between. Swamp rose mallow flowers are normally darker towards the middle and can become quite large, reaching anywhere from 8 to 10 inches across. Though an individual flower may only last a short period of time, the plant itself continues to bloom through late summer into fall.  The swamp rose mallow can bring quite the accent to any garden, and it is recommended to plant a group of 3 or more for a visually appealing effect.

Swamp rose mallow is native to the eastern and southern parts of North America and can be grown in hardiness zones 5-10.  The rose mallow can grow rather tall, reaching anywhere from 5 to 7 feet in a single growing season.  Since it is capable of growing so much, it may need to be staked for support.  The optimal growth conditions are full sun and moist soils rich in organic matter, but it can tolerate lower-quality soils, even those containing salt.  It will grow very well as long as the soil is not allowed to dry out.  If this plant is being grown in colder regions, one should consider mulch during the winter to protect the roots from frost. It is recommended to prune in the early spring for a bushier growth form.  Japanese beetles have been known to cause damage to the foliage if left unmanaged.