Fertilizing Endless Summer Hydrangea: Timing and Tips for Blue Blooms

Hold off on Holly-Tone fertilizer during the first season after planting; your hydrangea needs to establish roots, not push top growth. After the first year, fertilize once annually in spring or fall. Used coffee grounds are a great soil amendment—apply sparingly at first, then freely. Both Holly-Tone and coffee grounds lower soil pH, which encourages the coveted blue blooms on Endless Summer hydrangeas by increasing aluminum availability.