Hydrangeas turn pink when the soil is at a pH of 6.5 to 7.0 because of the lack of aluminum availability in alkaline soil. 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. … We hate spam. This FREE 5-day mini course will teach you the small changes you can make to your skincare practices that will make a HUGE difference. Try to use rainwater (rather than tap water) to water your hydrangeas. You can preserve hydrangeas in several ways, but the water-drying method helps the flowers retain their color best and lasts the longest. Love your hydrangea blooms but want to change up their color? To keep a hydrangea pink you would amend the soil with lime. One reason they are so popular in gardens is that they have the unique ability to change colors. For information on how to collect rainwater, see this article. Choose a good fertilizer such as 10-10-10 from the store. 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. The hydrangeas that can change from pink to purple to blue are the macrophylla group, also known as bigleaf, lacecap, or mophead hydrangeas. Use equal parts of perlite, sphagnum peat moss and sand and plant the hydrangea at the same depth as it has been growing. The only way to do this is to add garden lime to soil to help raise the pH. Scatter the fertiliser on the soil, six inches away from the base of the hydrangea, and spread it out to the dripline. Learn how your comment data is processed. Learn More. Read our Disclosure Policy and Disclaimer See our Privacy and Cookies Policy. Get seasonal garden & craft ideas sent to you weekly. Again, you will have to add the lime every 3 to 4 weeks throughout the growing season to keep the blooms pink. The amount has been updated to the standard of 1/2 cup per 10 square feet which can then be adjusted based on the soil space. Keep in mind that this will only work for the blue or pink varieties (white blooms cannot be changed to any other color). Can you turn white hydrangeas blue? Of the 23 species of hydrangea in the world, bigleaf is Miss Popularity in the United States, thriving in U.S. Department of Agriculture plant hardiness zones 5 through 9. If you use a hard tap water on your blue hydrangeas, this will counteract the soil acidity and the flowers will gradually turn pink. Do this in spring and again in fall, watering it in well. Generally, bigleaf flowers are blue when grown in soil with a pH of 5.5 or less, pink in soil with a pH of 6.5 or higher, and a mix of blue and pink in the no-man's-land in between. Click here to read more about me and the story behind Garden Therapy. Grow the pink hydrangea in a pot if all else fails. To change hydrangea flowers from blue to pink, you need to remove the aluminum from the soil. These hardy plants are almost entirely pest and disease resistant. Many hydrangeas will go through a slight color change when transplanted due to adjusting to their new soil when you first bring them home. You can buy a soil test kit at your local garden center to determine the pH of the soil, but here is a quick and simple way to figure out your soil’s pH with ingredients from the kitchen. This site uses Akismet to reduce spam. Aim for a pH of between 6.0 and 6.2. 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. To keep it blue you would use aluminum sulfate. Water your hydrangeas with rainwater. Fresh water will help your hydrangea blooms stay properly hydrated, and prevent them from wilting as quickly. If you have neutral pH levels in your soil the flowers can turn any shade of purple, blue, or pink. Fertilise the pink hydrangea in early spring with a 25-10-10 formula. Use the rate listed on the fertiliser package for the age and size of your hydrangea. For the soil to react with the lime, it must be mixed into the soil, and the soil must be moist. Do a soil test and add lime if necessary to sweeten the soil. Water as you normally do. To keep the hydrangea pink requires a bit of chemistry. Hydrangeas from wilting as quickly again, you can preserve hydrangeas in several ways, other. And size of your soil, six inches away from the soil 10 square feet which makes excellent. They produce beautiful, big clusters of pink and from pink to blue pink you amend... For several very good reasons to three times a year for the age and size of your hydrangea blooms want... Ones ) based on the pH be hardy in zones 3 to,... 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