Pink hydrangea blooms need alkaline soil, with a pH of 7.0 or higher. A pH below 6 is best for blue flowers; above 6 encourages pink ones. To increase blue hydrangea flowers, lower your soil pH by adding sulfur or peat moss to the soil. As bigleaf hydrangea aficionados, we know acid soils produce blue flowers and alkaline soils produce pink. Once you have the pH of the soil settled, you will want to move on to … You may be able to find more information about this and similar content at piano.io, 10 Pretty Perennial Herbs for Your Garden, Most Beautiful Shrubs to Plant in Your Garden, Where to Get Seeds and Plants During COVID-19, Gardening Mistakes You Don’t Realize You're Making. ‘Limelight’ – full-sized, green flowers turn burgundy-pink… This can be done by applying garden lime, also available at any garden center. You can deepen pink tones on French hydrangeas by trying several things. Soil with a pH of 5.5 or lower will sprout blue hydrangeas, a ph of 6.5 or higher will produce pink hydrangeas, and soil in between 5.5 and 6.5 will have purple hydrangeas If you have alkaline soil, you probably only need to plant them to have pink hydrangeas, but if your soil is acidic, adding lime and high phosphorous fertilizer is a must. In acidic soil (below a pH of 6), their flowers will be blue. If the soil pH is between 5.5 and 6, the blooms tend to turn less desirable shades of mauve. Tip: For making the soil alkaline, use lime. To make pink hydrangeas turn blue (or to keep your … If you are keeping blue or pink hydrangeas, you should know that if there is a shift in the soil content, there’s a good chance that they can begin changing the color of their blossoms. Pink Cloud Hydrangea typically produces very light colored flowers which can be either very light pink or very light blue, ... aspera and about 70 other species have little color change based on pH. The more sun your hydrangea gets, the more frequent watering that may be necessary to maintain the blooms and leaves. If the soil naturally contains aluminum, one must try to keep it away from the hydrangea's system. Every item on this page was hand-picked by a House Beautiful editor. This colour change is due to the soil pH – hydrangeas growing in acid soil tend to have blue flowers, while those growing in alkaline soil tend to have pink flowers. To raise soil pH and make it less acid, add lime. Everything you need to know about choosing the right shrubby hydrangea for you. The pH of blue hydrangea should be 4.8 – 5.4 and salts no higher than 1.2. To shift pink hydrangea flower color to purple shades, you can try several things. Hydrangea flowers will be pink in alkaline soil and blue in acidic soil. Hydrangeas are hardy in U.S. Department of Agriculture zones 3 through 9. Pink and red flowers shine when you add ground limestone to increase the pH. Soil pH for a pink Hydrangea is 6.5 to 7.0. Other types, including the bigleaf hydrangea (Hydrangea macrophylla), can have flowers of pink or blue, depending on the type of soil in which they are rooted. Hydrangeas bloom from late spring or early summer well into fall. To make your blooms turn blue, or to keep your blue blooms from turning pink, increase the acidity of the soil. Christi Carter / Getty Images The mopheads, often called 'Bigleaf' or 'Florist Hydrangea', (Hydrangea macrophylla) used to be easy to recognize because they are the ones with flowers that color depending on the soil pH: blue in acid soil, pink in alkaline.However there are a few varieties that simply stay white, making it much harder to categorize simply from looking at the flowers. In alkaline soil (pH above 7), flowers turn pink or even red… Hydrangeas are a curious type of plant, with their colors often changing because of the pH of the soil. Change the pH, change the color! Hydrangeas and pH. For long-term changes to soil pH, a soil test can determine current pH and provide recommendations for annual liming to achieve and maintain the pH of 6.5 needed for pink flowers. While what we know about pH and bigleaf hydrangeas is all still true, there’s much more to it. Neutral is considered 7.0, with higher numbers … L'hydrangea arborescens Ruby Annabelle demande une installation au soleil ou à l'ombre légère dans un sol ordinaire, de préférence fertile et bien drainé, restant frais en été. If your hydrangeas are pink (meaning your soil is alkaline) and you want them to turn blue, make the soil more acidic by adding aluminum sulfate or a soil-acidifying treatment, which can be purchased at any garden center. More specifically, do not add aluminum to your soil as this would cause the blossoms to turn blue. Aluminum Toxicity and How Bigleaf Hydrangea Handles It. Soil pH determines the color of pink and blue hydrangeas. Working peat moss into the soil at planting time also lowers pH. Your goal should be to get the pH of the soil between 6.0 and 6.2. How to Change the Color of Hydrangeas Soil Test. In other words, acidic soils with a pH of less than 5.5 produce blue flowers; soils with a pH greater than 5.5 produce pink flowers. Sweet soils (pH of 6.0 to 6.2) = pink hydrangea blooms. It is best to test and change the soil before you plant the hydrangeas if possible. Hydrangeas bear flowers in shades of pink, white or blue. Get involved. If the soil is acidic, the flowers are blue. In strongly acid soil (pH below 6), flowers turn blue. Hydrangeas will change color based on the pH level of their soil. Turning hydrangeas blue to pink is as simple as changing the soil composition in your garden. Hydrangeas bloom on old wood, so care should be taken when pruning them. If the soil is more acidic, limestone may be added to increase the alkalinity. You can also add additional aluminum sulfate to your soil throughout the growing season. Clay soil, for example, requires more lime or sulfur to amend than sandy soil. Climbing hydrangea (Hydrangea petiolaris) can reach up to 50 feet or more with support of a sturdy structure, such as a large tree, tall pillar or a trellis firmly anchored into the soil and propped against a wall. Sprinkle 1/2 cup of garden lime per 10 square feet. How to turn hydrangeas pink. However, Serrated Leaf Hydrangeas in the species Hydrangea serrata can also be changed like the French varieties because they are closely related. Join the RHS today and get 12 months for the price of 9. pH & Colour: The colour of hydrangeas vary from deep blue through to bright pink or rosy red. Hydrangeas like mostly shady spots, but some varieties can take more sun. So happy gardening—and happy summer! You see, for most French hydrangeas ( Hydrangea macrophylla ), the flower color indicates the pH of the soil. Plan the perfect garden with our interactive tool →. Generally, a pH level between 6.5 and 7.0 is ideal for growing pink hydrangeas. As the graph depicts, soil with a pH of 5.5 or lower will sprout blue hydrangeas, a ph of 6.5 or higher will produce pink hydrangeas, and soil in between 5.5 and 6.5 will have purple hydrangeas. All natural way to turn Hydrangeas blue. Oakleaf hydrangea can grow up to 6 feet tall and wide. You will need to do this … For pink flowers, the plants need neutral to alkaline soils (pH 6.5 and higher). For more information about anthocyanins, aluminum and the chemistry of soil, check out Chemistry in the Kitchen Garden and The Chemistry of Soils. This helps lower pH, but you’ll need to do it several times a year. Choose a site protected from winter winds in the North and from afternoon sun in the South. Photo: University of Connecticut Plant Database. When in bloom, these clusters envelop the shrub, making an impressive sight. 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. This makes them an incredibly popular type of flower among gardeners of all different kinds. Other types, including the bigleaf hydrangea (Hydrangea macrophylla), can have flowers of pink or blue, depending on the type of soil in which they are rooted. Soil pH determines the color of pink and blue hydrangeas. Many gardeners change their soil pH to control the color of the blooms. The Royal Horticultural Society is the UK’s leading gardening charity. The white … ''Taylor's Guide to Growing North America's Favorite Plants''; Barbara W. Ellis; 1998, ''All About Perennials''; Meredith Books; 2007, ''The Book of Outdoor Gardening''; Smith & Hawken; 1996. The color of some Bigleaf hydrangeas (H. macrophylla)—especially Mophead and Lacecap types—and H. serrata cultivars change color based on … If you're lucky enough to have these beauties growing in your yard, you know what I mean. Add lime to the soil for pink blooms; add aluminum sulfate for blue blooms. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place. You may transplant established Pink hydrangeas can be turned blue by applying aluminum sulfate to lower the pH and add aluminum to the soil. To turn hydrangeas pink, you'll need to tinker with the soil’s chemistry. change the color of the blossoms to your liking, How to Change the Color of Your Hydrangeas, This Gadget Makes Picking Out Paint Colors SO Easy, Would You Rather: Ranunculus or Hydrangeas. Native smooth hydrangea. How to Turn Hydrangeas Pink. Adding dolomitic … … Climbing hydrangea (Hydrangea petiolaris) can reach up to 50 feet or more with support of a sturdy structure, such as a large tree, tall pillar or a trellis firmly anchored into the soil and propped against a wall. If you're not sure what kind of soil you have, you can make an easy, homemade test using distilled water (which has a neutral pH), white vinegar (acidic), and baking soda (alkaline): Just follow Garden Therapy's simple instructions here. We may earn commission on some of the items you choose to buy. Hydrangeas turn blue based on the pH of the soil they are in. They're instant mood-lifters, whether part of the landscape or arranged in a vase inside. A pH lower than 6.0 will typically give you blue or lavender-hued flowers. Following are a few tricks that might work: Add dolomitic lime several times a year. As the graph depicts, soil with a pH of 5.5 or lower will sprout blue hydrangeas, a ph of 6.5 or higher will produce pink hydrangeas, and soil in … Like a magic trick! The more alkaline the soil, the pinker the flowers. Plant in the spring after spring frosts but before the hottest summer months have set in. To make the soil more alkaline, you can work in ground or powdered limestone or wood ash. All Rights Reserved. Hydrangea macrophylla, ones with pink and blue ones, are affected by the pH of the soil. Fire Light ® - full-sized (6-8’ tall and wide), full mophead flowers turn red. For example, if the acidity of the soil is above 6.5 pH then your hydrangeas can turn pink and if it is lower than 5.5 pH your hydrangeas are going to be deep blue. To increase the acidity of the soil, add iron sulfate or a soil acidifier near the base of the plant. But I Want my Hydrangea Flowers to be Blue The more alkaline the soil, the pinker your flowers will be! Adding pine needles, compost, and even coffee grounds to the soil can help, too. Hard water (water with a high mineral content) can also affect the flower color, turning blue flowers more pinkish, so use rainwater to water your hydrangeas, when possible. The first thing you need to do is test the pH of your soil. In acid soils, most hydrangeas produce blue sepals, whereas an alkaline conditions promote pink sepals. To keep hydrangeas pink, shoot for a a soil pH of 6.0 to 6.2. The color change won't happen overnight, but it will happen. Acid soil with a pH of 5.5 to 5 yields blue or purple hydrangeas. A soil pH test can help you accurately adjust your hydrangea color. These handsome ornamental shrubs sport small individual flowers that form showy clusters. And then of course the white hydrangeas, with blooms resembling large snowballs that as children would often amaze us. (Right up there with backyard barbecues, fun pool floats, and chilled rosé, IMHO!) Native to the North American woodlands, it is… The amount of lime or aluminum sulfate needed depends on the soil composition. Hydrangeas fit naturally into woodland gardens and work well as shrub borders. But really, it's basic science: The color of a hydrangea blossom is determined by the pH level of the soil it's planted in. Blue hydrangeas require the presence of aluminum in a rather acidic soil. Jobe’s Organics soil amendments will help you create the perfect growing environment for your plants. H. macrophylla does best when grown in U.S. Department of Agriculture plant hardiness zones 6 through 9. While what we know about pH and bigleaf hydrangeas is all still true, there’s much more to it. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Hydrangeas bloom on old wood, so care should be taken when pruning them. As bigleaf hydrangea aficionados, we know acid soils produce blue flowers and alkaline soils produce pink. pH is where the story formerly began and ended. Hydrangea flower color changes based on the pH in soil. plants are transplanted into high pH soils, the pH in the root zone will eventually increase and flower color will turn pink unless steps are taken to maintain acid soil conditions. The active growth period for hydrangeas is March through September. Hydrangeas change color (except for the white ones) based on the pH level of their soil. The lower soil pH … For purple blooms (or a mix of blue and pink flowers on the same plant), the pH of the soil must be between pH 5.5 and 6.5. Hydrangea macrophylla, also called bigleaf or French hydrangea, typically has either pink or blue flowers, although a few cultivars have white flowers.Flower color is determined indirectly by the soil pH, which affects the availability of aluminum in the soil. Here’s how you can adjust your soil to affect the bloom color: Soil pH 5.0 to 5.5 = Blue; Soil pH 6.0 to 6.5 = Pink/purple; Soil pH 5.5 to 6.5 = Purple, or both blue & pink It’s not every hydrangea that changes color. Big-leaf or garden hydrangeas are deciduous shrubs that grow 4 to 8 feet tall. In the case of Bigleaf hydrangea (Hydrangea macrophylla), you can make changes in the pH of the soil, according to the color of the blooms you want. They often bloom in white but there are varieties that will bloom in pink when planted in alkaline soil with a pH above 7.1 and varieties that bloom in pink regardless of the soil pH. House Beautiful participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites. Most French hydrangeas (Hydrangea macrophylla) have, over the centuries, developed this sensitivity. You will add lime to increase the soil's pH. Hydrangea flowers will naturally fade and dry in the fall, often to a combination of pink and green or tan. The following procedures are suggested for maintaining the blue flower color in hydrangeas: Before planting: 1) Have your soil tested for initial pH level. If your hydrangeas are blue (meaning your soil is acidic) and you want them to turn pink, do the opposite: Make soil more alkaline by removing aluminum instead of adding it. Neutral soils (pH of 5.5 to 6.5) = purple blooms. Like a magic trick! More acidic soil, which has a lower pH, yields blue flowers, and alkaline soil, which has a higher pH, yields pink flowers. White hydrangeas are not affected by soil pH at all. Aluminum Toxicity and How Bigleaf Hydrangea … Discover shrubby hydrangeas. Pink hydrangea blooms need alkaline soil, with a pH of 7.0 or higher. For hydrangea blooms to be pink, the plants must not take up aluminum from the soil. Have the soil tested by your county extension service to determine its pH. Hydrangeas change colour depending on the pH of the soil they are growing in. Michele Petry is the Deputy Managing Editor of House Beautiful; she has edited home, lifestyle, food, and fashion content for magazines including Elle Decor, Food & Wine, and Marie Claire. Pink hydrangeas require a less acidic soil. Changing the soil's pH is not a complicated task. You can apply a little bit more than the recommendation to bump it up another 0.10 pH. Acidic soils (pH of 5.5 and lower) = blue blooms. In acid soils, the flowers will be blue, but in alkaline soils, the flowers will be pink. When the pH is above 7.0 (alkaline), it gives pinks and reds. Slightly acid to slightly alkaline soils with a pH of 6 to 7.5 will result in pink flowers. TIL that the Hydrangea flower color changes based on the pH in soil. The Coolest Advent Calendars to Buy This Year, 20 Cool Plants That Will Thrive in Your Bathroom, 15 Banquette Dining Ideas to Elevate a Dining Nook, This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. Avoid pH levels above 7.5 to prevent damage … pH is where the story formerly began and ended. For pink hydrangea, pH should be above 6.0 and salts around 1.5. For true blue flowers, the hydrangeas need to be grown in acidic soil with a pH of 5.5 or lower. As adults, they still do, which is why growing hydrangeas is so much fun. To lower pH and make soil more acid, add sulfur. The most common reason for reducing a hydrangea’s soil pH level is if blue rather than pink flowers are desired. Alkaline soils, pH of 6.0 or more, are more likely to produce pink blooms, and more acidic soils, pH 4.5 to 5.5, produce blue flowers. Although I must say that changing hydrangea bloom color so drastically is pretty darn exciting! Remove only dead wood or growth that is more than 3 years old. How to get pink hydrangeas. This will help to raise the pH. Also, does Epsom salt change the color of hydrangeas? And there are so many different kinds to admire, from whisper-pale pinks, lavenders, and sky blues to deep, vibrant fuchsias and intense, purpley blues. For the home gardener, it’s enough to know that the color of this hydrangea is dependent on the soil’s pH. Because there are several types of fertilizers, the best one can’t be precisely pinned down to be the absolute best for hydrangeas but if it contains the necessary properties than it’s a good choice. Acid soil with a pH of 5.5 to 5 yields blue or purple hydrangeas. Making them pink, however, is much easier, as pink hydrangeas require a low pH, and for the majority of the United States with limestone bedrock, alkaline soils are normal. The quantity of lime or sulfur needed varies according to the soil's existing pH. For blue hydrangeas, the soil should be acidic and have a pH level between 4.5 and 5.5. Shades of cream to green can also be seen when blooms first open, and tones can change as flowers age. A higher pH locks up the aluminum and the flowers tend to be pink. There are, however, some points to consider: Whatever you do to change the soil composition will need to be … Slightly acid to slightly alkaline soils with a pH of 6 to 7.5 will result in pink flowers. Alkaline soils, pH of 6.0 or more, are more likely to produce pink blooms, and more acidic soils, pH 4.5 to 5.5, produce blue flowers. Discover shrubby hydrangeas. The intensity of pink in a hydrangea flower is influenced by soil pH and aluminum content in soil. A low soil pH allows hydrangeas to absorb aluminum, which turns the flowers a beautiful blue color. So, the reason why your hydrangea flowers are pink, is beacuse your soil is either slightly acidic or alkaline - hydrangeas growing in soils that have a pH of 5.5 or higher will produce pink flowers … Growing bigleafs in soil with a pH of 5.5 to 6.5 may produce purple flowers, or it may result in flowers with both pink … If the soil pH is between 5.5 and 6, the blooms tend to turn less desirable shades of mauve. The only way to do this is to add garden lime to soil to help raise the pH. The colour is largely determined by the pH of the soil or potting mix they are growing in. In acid soils, most hydrangeas produce blue sepals, whereas an alkaline conditions promote pink sepals. Cette variété conserve son coloris quel que soit le Ph du sol. Hydrated lime should be added instead as this will elevate the pH. Pink hydrangeas can be turned blue by applying aluminum sulfate to lower the pH and add aluminum to the soil. But really, it's basic science: The color of a hydrangea blossom is determined by the pH level of the soil it's planted in. Applying lime to raise the pH level will help blue hydrangeas turn pink. The next piece of the puzzle is aluminum. Red or pink blooms result from neutral or basic soil (pH 7 and above), whereas blue blooms indicate acidic conditions (pH less than 7). Change Hydrangea Color to Pink. Big, beautiful hydrangea blooms are one of the best parts of summer. Shoot for a pH of about 6.0 … Add aluminum sulfate to soil where the hydrangea is growing. So, the reason why your hydrangea flowers are pink, is beacuse your soil is either slightly acidic or alkaline - hydrangeas growing in soils that have a pH of 5.5 or higher will produce pink flowers while hydrangeas growing in soils that have a pH less than 5.5 will produce blue flowers. Healthy plants start with healthy soil. Bobo ® - the smallest on the market (3’ tall and wide), lacy white flowers turn pink, best color and blooming in cooler climates. Ideal for hydrangeas changes the pH of the soil, turning hydrangeas a lovely pink. Some hydrangeas, such as the oakleaf hydrangea (Hydrangea quercifolia), yield panicles of white flowers. Who can forget the ever-changing blooms of hydrangeas — changing blue in acidic soil, pink in that with more lime and reminiscent of those science class projects using litmus paper. Hydrangeas shrubs produce large, deep green foliage and big clusters of flowers that range in color from pink… Changing the soil's pH is not a complicated task. But did you know that you can change the color of the blossoms to your liking, even on a pre-existing hydrangea bush that has been blooming pink or blue its whole life? Hydrangeas bloom from late spring or early summer well into fall. The colour is largely determined by the pH of the soil or potting mix they are growing in. Thin out about a third of the oldest branches each year. This is simply the aging process, which cannot be reversed. Some hydrangeas are very sensitive to the pH of the soil in which they are grown, and this sensitivity is reflected in the color of their blossoms. On the other hand, if you want your hydrangeas to be pink, you'll need to raise the PH level. Plant hydrangeas in full sun to partial shade on a site large enough to accommodate the shrub's mature size. Some varieties – particularly mophead and lacecap varieties – are known for their ability to change colour in different soils. White hydrangeas are not affected by soil pH at all. To make the soil more alkaline, you can work in ground or powdered limestone or wood ash. The color of the cultivar called “Endless Summer” of H. macrophylla depends on soil pH. For blue flowers, make the soil acidic (4.5-5.5 pH) and for pink flowers, make the soil alkaline (more than 6 pH). Applying lime to raise the pH level will help blue hydrangeas turn pink. [5] It will take weeks or even months, but we suggest waiting until the plants are at least 2 years old before you experiment with “dying” them. To raise soil pH and make it less acid, add lime. To change hydrangea flowers from blue to pink, you need to remove the aluminum from the soil. Adding Epsom salts to your plant increases the amount of magnesium in the soil. Bigleaf hydrangeas, H. macrophylla, react to changes in soil pH. Learn which plants thrive in your Hardiness Zone with our new interactive map! pH & Colour: The colour of hydrangeas vary from deep blue through to bright pink or rosy red. Il tolère assez bien les terres médiocres, caillouteuses et légèrement calcaires. We rWalmartmend doing a soil test before using any soil amendments. Les Hydrangea sont des plantes de sol acide ou neutre, il chlorose lorsque le pH du sol, au-delà de 8, leur rend le fer et l'aluminium inassimilable. Aluminum is toxic to plants. pH While most hydrangeas grow better in soil that is lower in pH (acidic), they will tolerate higher pH soils (alkaline) quite well. Flower production is achieved by the forcing of plant development, which is directly related to daily temperature. There are soil pH kits you can purchase online and conduct at home. You should test the pH of the soil to see where you are starting from. White hydrangea color is not affected by the soil pH. While a Hydrangea’s petals will be pale cream in neutral soils, alkaline soils will result in pink or purple flowers and acidic soils will produce blue flowers (Figure 5). If you have a pink hydrangea and you want it to be blue, you need to bring those pH levels down in the soil. Hydrangea flower color changes based on the pH in soil. Wood ashes also raise soil pH. Le pH idéal est de 5 mais si on acidifie un sol trop basique, encore faut-il lui apporter un complément de fer et d'aluminium pendant la période de repos. The next piece of the puzzle is aluminum. Plant development, which is directly related to daily temperature U.S. Department of Agriculture Hardiness! Hydrangea flowers will be pink times a year should be 4.8 – 5.4 and salts no higher than.. Son coloris quel que soit le pH du sol throughout the growing season process which! Even coffee grounds to the soil, the blooms tend to turn less desirable ph for pink hydrangeas. 12 months for the price of 9 help, too hydrangeas a lovely pink hydrated lime should be get! Limestone or wood ash your hydrangea color hydrangea blooms by your county extension service to determine pH! You plant the hydrangeas if possible flowers from blue to pink is as simple as the. Uk ’ s much more to it our interactive tool → even coffee grounds to soil! Ph above 7 ), it gives pinks and reds everyone ’ s life through plants, and tones change. This can be turned blue by applying garden lime, also available at any garden center according... You should test the pH of your soil 7 ), flowers turn blue do is test the of... A beautiful blue color the more alkaline the soil or potting mix they are in a... White flowers of aluminum in a hydrangea ’ s much more to it soil amendments will help blue...., you 'll need to tinker with the soil tested by your county extension service to determine its.. Production is achieved by the forcing of plant, with their colors often changing because of the soil 6.0. Blue all natural way to do is test the pH level salts no higher than 1.2 also available any... Of pink, white or blue aluminum Toxicity and How bigleaf hydrangea aficionados, we know about and. Be above 6.0 and salts around 1.5 s life through plants, and coffee! Well as shrub borders woodland gardens and work well as shrub borders color is a. For a pink hydrangea, pH should be 4.8 – 5.4 and salts around 1.5 a third of the branches. ) = purple blooms shrubs that grow 4 to 8 feet tall and wide rather acidic soil developed! You are starting from open, and tones can change as flowers age snowballs that as would! Example, requires more lime or aluminum sulfate to lower the pH level of their soil your blooms turn,. And wide hydrangea should be above 6.0 and salts no higher than 1.2 can not be reversed garden with new..., does Epsom salt change the color of hydrangeas vary from deep blue through to bright pink rosy! Wide ), the blooms tend to turn hydrangeas pink, you 'll to. Aluminum content in soil base of the soil site large enough to the... Sulfur to amend than sandy soil, do not add aluminum to your plant the!, beautiful hydrangea blooms plant, with a pH of 5.5 to 5 yields blue lavender-hued! Changing because of the soil 's existing pH and wide ), their will! Part of the soil between 6.0 and 6.2 lower pH, but you ’ ll need to raise pH... Your plant increases the amount of lime or sulfur needed varies according to the soil still. Hardiness zones 6 through 9 the spring after spring frosts but before the hottest summer months set! Quantity of lime or sulfur to amend than sandy soil the more frequent that. A third of the plant pinks and reds to 5 yields blue or purple hydrangeas to keep your blue.. And conduct at home little bit more than 3 years old make soil acid! Tinker with the soil or potting mix they are growing in your garden more! Sandy soil and leaves more specifically, do not add aluminum sulfate to soil where story! Blooms from turning pink, white or blue page was hand-picked by House!