Endless SummerTM is now seasonally available at a Garden Center near you. McCorkle Nurseries offers this unique repeat bloomer in 8 inch, 3 gallon, and 7 gallon sizes. Use the "Endless Summer Garden Center Locator' below to find the nearest participating Garden Center to you. Endless SummerTM Hydrangea Hydrangea macrophylla, 'Bailmer' (PPAF) Endless SummerTM is a showy mop-head type hydrangea with the unique ability to bloom consistently on both old and new wood. The result is a plant that provides beautiful flowers all summer long. It is unusually hardy compared to other Hydrangea macrophylla, throughout Zone 4 to Zone 9 climates. The flowers grow up to 8" in diameter, with pink blooms in alkaline soils and blue blooms in acidic soils.