Hydrangea, Let's Dance ¡Arriba! Compact Reblooming Macrophylla x Serrata Hybrid HydrangeaArriba! Hydrangea is a truly compact fast growing deciduous shrub with a rounded habit and serrated dark green leaves with no fall color. Its lacecap flowers bloom on both new and old wood with color that depends on the soil PH acidic soils produce violet flowers, while alkaline soils produce deep saturated pink flowers and rebloom continuously through summer. The flowers attract butterflies and pollinators. Best bloom in partial sun and rich, moist