Tolerates most sites. Dioecious. Very invasive, by the seeds that birds love to eat; probably best to refrain from planting this species in the landscape. Susceptible to rusts (Puccinia coronata), that also attacks oats (in oat growing areas, buckthorn eradication is recommended). The bark, leaves, and fruit were once used in purgatives, thus one of […]
The massive genus of Rhododendron has between 800 and 900 species and countless hybrids and cultivars of numerous sizes, flower colors, and hardiness levels. Plants of this genus can be evergreen or deciduous. Azaleas are part of the Rhododendron genus. […]
A widely adaptable, hardey (perhaps more than indicated) small compact shrub. Flowers are relatively small, but numerous, making it very showy in spring. Subject to winter-burning of foliage, but not as much as other rhododendrons. Blooming occurs while the plant is young and occurs heavily. Susceptible to a large number of pests and diseases, which […]
Read More… from Rhododendron minus var minus ‘White Perfection’
Handsome tree with a more upright habit that lacks the pendulous character of the lower branches seen in the species type. Requires an acidic soil and is subject to severe iron chlorosis on calcareous soils. This can be corrected but it means additional maintenance. […]
Somewhat tolerant of city conditions. Oak wilt and scales, and many other oak tree pests, though none considered very serious. Low maintenance, long-lived tree. Use Northern sources in Indiana. […]
Naturally grows in rocky places and poor, dry sites. Dislikes poor drainage. Bark has the highest tannin content of any Quercus species. […]
The tightly columnar ‘Fastigiata’ provides a strong vertical accent, and is far more popular in the Midwest than the straight species. Powdery mildew on the leaves can be a significant problem. Seed propagated 80-90% true to type, thus variation can also be a problem. […]
One of the best and most reliable of oaks as a shade or street tree. More vigorous and fast-growing than most oaks. Good street tree since it performs reasonably well in small soil volumes (although it tends to branch close to ground). Oak wilt disease has been troublesome in certain areas of the Midwest. Hybridizes […]
Somewhat tolerant of city conditions. Can be pruned into a hedge. Leaves persist into winter, after the normal leaf raking period, and then fall. Oak gall susceptible, but a minor problem. […]
More tolerant of city conditions than most oaks. Perhaps too large for a typical residential landscape when mature. […]
The Purdue Arboretum is a collaboration between the Department of Horticulture and Landscape Architecture and Physical Facilities Grounds Department