Abstract: A new and distinct Rhododendron cultivar named ‘HOLDEN52’ is disclosed, characterized by colorful rose-pink flowers with definite white and light pink patterning. Plants are heat tolerant to USDA zone 9 and cold hardy to Zone 5. Resistance to Phytophthora root rot has been observed. Plants have a dense, mounded habit and dark green, glossy mature foliage. The new cultivar is a Rhododendron, suitable for ornamental garden purposes.

Abstract: A new and distinct Rhododendron cultivar named ‘HOLDEN52’ is disclosed, characterized by colorful rose-pink flowers with definite white and light pink patterning. Plants are heat tolerant to USDA zone 9 and cold hardy to Zone 5. Resistance to Phytophthora root rot has been observed. Plants have a dense, mounded habit and dark green, glossy mature foliage. The new cultivar is a Rhododendron, suitable for ornamental garden purposes.

Abstract: A new cultivar of hybrid Rhododendron plant named ‘HoldenRhodo201’ that is characterized by its showy flowers with strong marginal undulation, its flowers that are pink, fading to white and have a deep red flare, its profuse and consistent flowering with flower buds that are hardy to at least ?15° F., its compact plant habit, its foliage that is glossy and dark in color, its ease of propagation by stem cuttings, its vigorous growth habit in full sun in unamended sand and gravel loam soils up to pH 6.2, and its high resistance to root rot caused by Phytophthora cinnamomi.

Abstract: A new cultivar of hybrid Rhododendron plant named ‘HoldenRhodo213’ that is characterized by its resistance to root rot caused by Phytophthora cinnamomi, its cold hardiness at least in U.S.D.A Zone 5a, its flower buds that are pink in color that open to flowers that are creamy white in color with yellow centers, and its adaptability to open field conditions in Northeast Ohio with soil pH up to at least 6.2.

Abstract: A new cultivar of hybrid Rhododendron plant named ‘HoldenRhodo212’ that is characterized by its resistance to root rot caused by Phytophthora cinnamomi, its old hardiness at least in U.S.D.A Zone 5, its flowers that are fuchsia in color, its adaptability to open field conditions in Northeast Ohio, and its compact form that has been observed after 8 years.

Abstract: A new and distinct cultivar of Rhododendron plant named ‘HoldenRhodo214’ is disclosed, characterized by showy rose-purple flowers, and dark, glossy foliage ‘HoldenRhodo214’ has a compact habit and has been observed to have a high survival rate in evaluation fields known to contain the root rot soil pathogen Phytophthora cinnamomi. Also observed is robust growth in full sun in unamended sand and gravel loam soils, up to pH 6.2. Profuse and consistent flowering, with plant and flower buds hardy to at least ?26° C. The new variety is a Rhododendron, typically produced as an outdoor ornamental plant.

Abstract: A new cultivar of hybrid Rhododendron plant named ‘HoldenRhodo211’ that is characterized by its resistance to root rot caused by Phytophthora cinnamomi, its cold hardiness at least in U.S.D.A Zone 5, its flowers that are pink in color with yellow center markings, and its adaptability to open field conditions in Northeast Ohio.

Abstract: A new cultivar of hybrid Rhododendron plant named ‘HoldenRhodo221’ that is characterized by its resistance to root rot caused by Phytophthora cinnamomi, its cold hardiness (plant and flower buds) at least to U.S.D.A. Zone 5a, its flowers that are red to dark pink in color with strong marginal undulation, its profuse and consistent flowering, its compact plant habit, its foliage that is dark in color and glossy, and its good growth in full sun in unamended sand and gravel loam soils, up to at least pH 6.2.