Hydrangea Color - Knowledgebase Question

Boerne, TX
Question by hyjak
May 20, 1998
I have three 5 year old hydrangeas on the north side with partial shade. This year the blooms are very light pink. How can I deepen the color - or change the color?


Image
Answer from NGA
May 20, 1998

0

You can change the color of hydrangea blooms with a simple soil treatment. 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.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:

Username:

Password:

[ Join now ]

Today's site banner is by rocklady and is called "Wildflower"