To keep the hydrangea pink requires a bit of chemistry. Change Hydrangea Color to Pink. The water helps the lime spread throughout the soil. Since this pink hydrangea’s 2010 debut, it has raised funds to support 14,600 hours of research. Purple blooms are usually the result of a more neutral soil pH. Scatter the fertiliser on the soil, six inches away from the base of the hydrangea, and spread it out to the dripline. Hi Michelle – To change the color of your hydrangeas to pink or blue you sprinkle the product in the soil around the plants. What changes hydrangeas’ color? As flowers mature, the color shifts to yield a pale pink hydrangea before turning to green tones.Every Invincibelle Spirit plant sold yields $1 for breast cancer research. Your email address will not be published. Search for a stockist online. Better Living Through Plants. As most gardeners will know, Hydrangea macrophylla responds to acidic soil by producing blue flowers, whereas a chalky, alkaline soil will turn them bright pink. Do I use three to four cups every four weeks? Read the back of the lime package to determine how much lime to add. Plants can be made (or kept) blue by applying aluminum sulfate to the soil; plants can be kept pink by liming the soil or applying superphosphate. To make it more alkaline, do the same with ground lime. Use a rake or hand cultivator to scratch the lime into the top 2 inches of soil. Love your hydrangea blooms but want to change up their color? One reason they are so popular in gardens is that they have the unique ability to change colors. To keep it blue you would use aluminum sulfate. Hydrangea flowers will naturally fade and dry in the fall, often to a combination of pink and green or tan. This video is unavailable. The only way to do this is to add garden lime to soil to help raise the pH. Hydrangeas can grow up to fifteen feet tall, so choosing the right variety is important, and caring for it and trimming it back can become equally important. Fertilize the ground surrounding the hydrangea once in late winter. Sprinkle 1/2 cup of garden lime per 10 square feet. Sprinkle dolomitic lime on the soil around the hydrangea two to three times a year, with the first application in the fall. It can take up to a year for the color change to happen. There is a fertilizer specially formulated to keep your hydrangea pink. The county cooperative extension office supplies these tests for a nominal fee and the results go a long way in helping you determine what to add to the soil to help the hydrangea keep its rosy colour. How To Keep Hydrangeas Pink To keep it or change it to pink your hydrangea needs to be grown in alkaline soil that has a pH level of 6.5 and above. *Commercial growers of greenhouse hydrangeas (and others interested in this subject), see the two notes at the bottom of this page. Turning a pink hydrangea blue is easier than turning a blue hydrangea pink. Watering in the morning will help prevent hydrangeas from wilting during hot days. She holds a Bachelor of Arts in English with a concentration in creative writing. We hate spam. Sprinkle dolomitic lime on the soil around the hydrangea two to three times a year, with the first application in the fall. The most common way to make the soil more alkaline is to add lime. Keep in mind that changing the pH of your soil is a gradual process and will not result in deep blue blooms overnight. This site uses Akismet to reduce spam. Can you turn white hydrangeas blue? Your goal should be to get the pH of the soil between 6.0 and 6.2. Why the difference? If you use a hard tap water on your blue hydrangeas, this will counteract the soil acidity and the flowers will gradually turn pink. Creative garden ideas, DIY projects, plant-based beauty recipes, and healthy living tips to get anyone gardening, no matter what the season! Her articles have appeared at Trulia.com, SFGate.com, GardenGuides.com, RE/MAX.com, MarketLeader.com, RealEstate.com, USAToday.com and in "Chicago Agent" magazine, to name a few. Learn how your comment data is processed. Learn More, © Garden Therapy, 2009-2020. Water the soil slowly and deeply, to a depth of 10 inches, after applying. They produce beautiful, big clusters of pink, white, or blue flowers. Hydrangeas are some of the most popular plants for several very good reasons. Fertilise the pink hydrangea in early spring with a 25-10-10 formula. Your email address will not be published. Is the other not garden lime? Endless Summer Color Me Pink and Color Me Blue products (available at garden centers and from naturehills.com) supply pelletized lime and sulfur respectively. If you are using aluminum sulfate, you will need to add 4 tablespoons of aluminum sulfate to a gallon of water, and drench around the base of the plant every 2 to 4 weeks. Conversely alkaline soil with high pH will limit the amount of available aluminum so the colors you get will lean toward pink. To increase the acidity of the soil, add iron sulfate or a soil acidifier near the base of the plant. Water your hydrangeas with rainwater. Fertilise the pink hydrangea in early spring with a 25-10-10 formula. The bigleaf hydrangeas (Hydrangea macrophylla or H. serrata) are the alchemists of the garden. These hardy plants are almost entirely pest and disease resistant. For information on how to collect rainwater, see this article. 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