Hardiest Rhododendrons. Other rhododendrons for cold climates. Their leaves have a rounded base and are usually 4 5 inches long in length.
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Heat tolerance is an issue which also needs to be considered. Despite its name september song opens its loose showy clusters of orange pink and yellow blooms in spring. These two rhododendrons olga mezitt and spring parade are super duper winter hardy.
It s wise to mix in topsoil peat moss compost or sand before planting.
They grow best in well drained acidic soil. Some are more suited to tough conditions than others as evidenced by the horrible looking rhodies in so many local parking lots. In mid to late spring it bears abundant clusters of 3 to 4 large open funnel shaped rich reddish purple flowers up to 2 in. Their leaves have a rounded base and are usually 4 5 inches long in length.
