Saturday, November 16, 2019

Small Leaved Anise

'Florida Sunshine' anise at Milliken Arboretum in Spartanburg, SC

In recent years there has been lots of interest in the anise (Illicium) shrub group. Anise shrubs (Illicium spp.) are fast growing, evergreen shrubs (USDA zones 7 to 10). They exhibit a multi-stemmed, upright, compact form. Their green foliage  is quite attractive and aromatic, the odor similar to anise spice when crushed. Their shiny, leathery leaves are olive green in color and the 1.5 inch wide flowers are dark red and appear in early spring.

Yellow anise (Illicium parvifolium), aka small anise, is a Southeast U.S. native. Popularity has soared with the introduction of gold leaf cultivars like 'Florida Sunshine' and Banana Appeal®. The cultivar 'Florida Sunshine' grows only 7-8 feet tall. Both cultivars are more tolerant of full day sun and dry soils. Their gold color becomes sharper over the winter months

In the wild, species shrubs eventually grow 10 to 15 feet tall and should be spaced at least 5-6 feet apart in the landscape. Their natural habitat is in the wet, swampy areas or along wooded streams in humus-rich  acidic soil from Florida to Louisiana. However, newer varieties have demonstrated winter hardiness further north into (zone 6) parts of Tennessee, Carolinas, and Virginia.

Illicium grows in partial to full shade, but reportedly will acclimate to full sun if irrigated. The anise shrub world is changing. Watch for new cultivars arriving at local garden centers.



Friday, November 1, 2019

Kentucky Coffeetree

Kentucky coffeetree (Gymnocladus dioicus) is a large native tree found in 18 states, from New York west to Nebraska and from central Minnesota south to Oklahoma (zones 4 through 7). It averages a mature height between 60- 70 feet (some greater than 90 feet) with a spread of 35-50 feet. This tap-rooted tree establishes within 2-3 years, with an annual growth rate averaging 12-15 inches, about the same as ginkgo or white oak.
Kentucky coffeetree

Spring leaf out occurs in mid- to late spring. Recessed vegetative buds push forth as multi-pinnate compound leaves. A single leaf may measure 2 to 3 feet across, producing between 70 and 100 leaflets. Fragrant olive-white flower panicles appear in late May in clusters of 8 to 12 inches long by 3 to 4 inches wide.

In autumn its lime-yellow to golden brown compound leaves drop to become a leaf raker’s nightmare. During the winter months, the totally naked upright branches take on a stark appearance. K-coffeetree may be single or multi-trunked.

K-coffeetree grows in a wide variety of soil types and tolerates a poorly drained wet sites. No significant disease or insect pests mar the lush green tropical-like summer foliage. Bark is distinctively charcoal gray and shaggy, a trait more pronounced as the tree ages.

Spring pea-like flowers are dioecious, bearing either male or female flowers. Female trees bear clusters of broad bean pods measuring 5 -10 inches long and 1 ½ - 2 inches wide on the tips of branches. Flowers and pods are inconspicuous, mostly hidden within the dense foliage through late summer.

'Espresso' is a male cultivar with no seed pods to rake up. In colonial America the beans were harvested and a crude coffee extract was brewed, no threat to Starbucks. The leaves and bean seeds are reportedly toxic to man and grazing cattle.

K-coffeetree is rarely sold in garden centers, but is available from on-line nurseries. Notoriously difficult to transplant, young 2-inch caliper nursery-grown trees move easily.