Shop the largest selection of New Proven Winners® Hydrangeas Online. Proven Winners hydrangea shrubs are a classic garden staple that offer continuous blooms through spring and summer, with some varieties producing blooms even into fall. Choose from a beautiful selection of pink, purple, blue, white or green to complement your home garden aesthetic. While some need acidity in the soil, other hydrangeas are more alkaline tolerant and all have gorgeous, showy blooms that make excellent cut flowers.