![]() I’m a big proponent of working with the soil you have and planting plants appropriate for that soil type. It not only nourished the plants but helped to conserve moisture. I would apply a good layer of compost from local landscape supply companies every year or 2. They grew healthy, looked just fine & bloomed away (although some years heavier than others). I never fertilized hydrangeas when I was a professional gardener. ![]() If you’re in a cold climate, you may only have to do it 2 times a year. I did this 3 times a year in temperate coastal California because the hydrangeas have a long bloom time here. It’s not a 1 season deal and your hydrangea stays blue. However, the results are long-lasting but an acidifier will need to be applied in subsequent years to keep the color blue(ish). If your garden isn’t on drip or you don’t get consistent summer rains, then water with the hose or a watering can.Ī 2 – 3” layer of compost around the root ball will add nourishment and help to conserve moisture. Hydrangeas aren’t drought-tolerant plants so you should be watering them anyway!Īpplying this is a slow process when it comes to Hydrangea color change – don’t expect immediate results. The water which works it in and makes it effective. Make sure the soil is moist when you apply the acidifier and water it in well when you’re done. Even though this is an organic element, you can easily apply too much and/or too often. You don’t want to overdo it hoping to get a deep blue hydrangea. I worked it into the soil, to a depth of around 4”, in a circle halfway between the drip line and the base of the plant.īe sure to follow the directions and use the recommended amount for the size of your hydrangea. This product is organic and derived from elemental sulfur and gypsum. I changed the color of my client’s Endless Summer Hydrangea back to blue with a soil acidifier. I’ve never tried any of these but the truth is, you have to focus on the soil. Some ask if coffee grounds, epsom salt, rusty nails, or vinegar can change hydrangea color. Isn’t this what many of us want? Oh, those luscious blue hydrangea flowers! How to Make or Keep Hydrangeas Blue in Color Aren’t sure? If you’re unsure of your soil’s pH, you can find a soil lab in your state or buy a simple soil pH test kit or pH meter online. If you know your soil is more on the alkaline side, you want to apply the garden sulfur or soil acidifier upon planting blue hydrangeas. If your soil is more acidic, pH around or less than 5.5, then your blue hydrangeas stay blue or bluer. ![]() Alkaline soils, with a pH approximately from 7 – 9, generally contain clay. If your soil is more alkaline, then your hydrangeas will be pink or pinker. Hydrangeas color change is affected and determined by the soil pH. The health of your plants is dependent on the health of your soil. Soil runs from acidic to alkaline with varying degrees in between. The change in the color of your hydrangea is due to the pH of your soil. Why Do Hydrangeas Change Color?įirst off, hydrangeas prefer and do best in soil on the acid side just like rhododendrons, azaleas, Japanese maples, pieris, etc. I love the look of them as they go through these hue changes. This guide If you’re new to growing hydrangeas, the flowers can turn greenish as they age. ![]()
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