Zelkova serrata, or the Japanese Zelkova, is a relative newcomer to the landscape as deciduous shade trees go.  Established Zelkovas have proven unscathed by the drought of 2002.  Many plant people have referred to the Zelkova as the "Elm substitute" since native American Elms were virtually extinguished by the Dutch Elm disease of the early 20th century.  The Zelkova is a clean and stately tree, providing excellent shade.  The ultimate size of this tree is 60 to 80 feet high and about as wide.  Zelkova has a slow to moderate growth rate, though it can grow quickly in its earlier years, growing 1-1/2 to 3 feet per year in the first 5 years.

    Zelkovas do well in Zones 5 to 8.  They are tolerant to Southern heat, drought, windy conditions, and urban conditions.  This is a good choice for a street tree as it is tolerant to the hostile conditions encountered by street trees.  The tree has a vase shaped canopy and a gray, smooth bark which is suitable for carving your girlfriends initials, much like the beech.  There are several varieties of Zelkova serrata.  We are currently carrying "Green Vase", which has one of the faster growth habits of the Japanese Zelkovas as well as a nice vase shape.

    The ovate leaves are usually about two inches long and one inch wide with serrated edges, thus the name "serrata".  The foliage is a dark green color with a purplish red fall color.  The leaves are not hard to clean up in the fall and could probably be easily disposed of by simply mulching them into the landscape during the routine course of mowing.  Any fruit produced is small and insignificant.  As a rule, the Zelkova is relatively free of disease and insects.  Many people have not heard of this plant, but it is worthy of consideration when looking for a shade tree.  Until next week.

photo: University of Connecticut

                                                                                            Andy Lynn