Jen Kettell, Horticultural Technologist at the Arnold Arboretum, will present a lecture Thursday, April 14, from 6:30 – 8:30 in the Hunnewell Building, entitled Garden Plants Great and Small.  Low-growing and ground-covering woody plants can add texture, unity, and dimension to even the smallest of gardens.  In fact, these can be the perfect solution for the city gardener – small, low-maintenance plants that help to shade out weeds while adding interest.  Jen will share some of her favorites appropriate for a vaariety of conditions and uses.  Fee: $20 for Arboretum members, $25 for non-members.  To register online, log on to www.my.arboretum.harvard.edu, or call 617-384-5277.