‘Elite’ is a large, vigorous rhododendron and one of the earliest P.J.M. cultivars to bloom. One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking lavender soon after opening. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be […]
Read More… from Rhododendron × ‘Elite’ (P.J.M. Hybrid Group)
Compact plant with a long bloom season. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices. […]
Read More… from Rhododendron × ‘Holden’ (Shammarello Hybrid Group)
‘Olga Mezitt’ is a vigorous rhododendron with pink flowers. One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become dirty looking soon after opening. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices. […]
Read More… from Rhododendron × ‘Olga Mezitt’ (P.J.M. Hybrid Group)
The Catawba Rhododendron is considered to be one of the hardiest rhododendron species. Beautiful plant when it is used in mass. Flower color of the species does not combine well with some other flower colors. Flower color bleaches out in high pH. Subject to winter burning of foliage in exposed sites near the limits of […]
The compact, but wide and bushy ‘Lee’s Dark Purple’ is common in commerce. Avoid harsh, dry, windswept sites. Subject to winter burning of foliage in exposed sites near the limits of its range. Withstands -20 degrees Fahrenheit. Flower color bleaches out in high pH. Interveinal chlorosis can also occur in high pH soils. Sulfur can […]
Read More… from Rhododendron catawbiense ‘Lee’s Dark Purple’
Flower color bleaches out in high pH. Subject to winter burning of foliage in exposed sites near the limits of its range, however, this is a good cultivar for cold areas. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices. […]
Read More… from Rhododendron catawbiense ‘Mrs. C.S. Sargent’
‘Roseum’ requires wind and shade protection, although it is a vigorous grower. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices. […]
One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking mauve-lavender soon after opening. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices. […]
Read More… from Rhododendron × ‘Northern Starburst’ (P.J.M. Hybrid Group)
The Shumard Oak is a handsome tree that is drought and air pollution tolerant, and but can also be used in rain gardens. Transplanting and establishment can be difficult. […]
Quercus velutina is a large, deciduous oak with an irregular canopy. It is closely related to Q. rubra (Red Oak), which it is known to hybridize with. The interesting bark of the Q. velutina is nearly black and furrowed. Transplanting is made difficult by the long tap root. Not generally sold commercially. […]
The Purdue Arboretum is a collaboration between the Department of Horticulture and Landscape Architecture and Physical Facilities Grounds Department