moving a plants location - Knowledgebase Question

Bellerose LI, NY
Question by Crawbaby
July 23, 2009
i have a huge hydranger that has gotten too big for the space. When is the best time to move it, so as not to kill it? alos is it true the soil effects the color, when i planted this one it was pink and now the flowers a light blue. they are also about 15

Answer from NGA
July 23, 2009


The best time to dig and transplant your hydrangea is in the late winter or early spring before new growth begins. Soil acidity or alkalinity will change the color of hydrangea blooms. You can change the color back by treating the soil. Pink and red bydrangeas often turn blue or purple in acid soils, and plants can be made red by liming the soil or applying superphosphate. For blue flowers, treat the soil with 2 Tablespoons of aluminum sulphate per plant, making 4-6 applications at 2 week intervals, starting in the early spring before the plants bloom. (Sulfur will acidify the soil. The desired pH range would be between 5.5 and 6.) For pink flowers, add lime to the soil, to raise the pH above 7.8). Test your soil to measure the pH range.

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