Gardeners love to grow hydrangeas as they fill the garden with bursts of color. Gardeners often look for options to keep the plant healthy. Though Epsom salt is added to many plants to improve the soil quality and to provide nutrients, there's confusion about whether Epsom salt should be used for Hydrangeas as well. Using Epsom salt is easy, but its effectiveness needs to be analysed. This article discusses the benefits and consequences of using Epsom salt on hydrangeas and methods to use it.
What is Epsom Salt?
Epsom salt is a natural mineral that is made of magnesium, sulfur, and oxygen. In the garden, it is often used as a gentle boost for plants that need magnesium. Magnesium deficiency in plants usually causes yellowing leaves or slow and weak Growth. Epsom salt can help your hydrangeas stay healthier and greener.
Benefits of Using Epsom Salt for Hydrangeas
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Magnesium sulphate present in Epsom salt is highly beneficial for hydrangeas. Magnesium and sulfur both contribute to a healthy plant. Magnesium contributes to photosynthesis by aiding chlorophyll production. Magnesium also provides essential energy to the plant.
- Sulfur present in magnesium sulfate boosts vitamin production that strengthens the cell walls and ensures overall plant development.
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Prevents Magnesium Deficiency- Epsom Salt is useful in preventing magnesium deficiency in hydrangeas. A magnesium-deficient plant has yellow leaves, which makes it not only this, but Epsom Salt may also help the soil hold moisture for a little longer.
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Improves Growth and Flowering- Epsom Salt is known to improve Growth and flowering, and also provides enough nutrients.
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Deters Pests and Diseases- Magnesium sulphate in Epsom salt deters pests and diseases and also fights several growth problems.
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Changes Flower Colour- If Hydrangeas are treated with Epsom Salt, they usually don't change flower colour. A few species, like Hydrangea macrophylla and Hydrangea serrata, may change the flower colour if treated with Epsom salt.
Disadvantages of Using Epsom Salt
Using Epsom Salt is not always useful, especially if your soil already contains enough magnesium.
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Adding more than needed can actually hurt your plants instead of helping them. So, getting the soil tested before using Epsom Salt is necessary.
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Too much Epsom Salt can also disturb the natural balance between nutrients like calcium and magnesium in the soil, which can lead to poor plant health.
Method to Use Epsom Salt for Hydrangeas
Applying Epsom salt to Hydrangeas is actually very simple.
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Start by checking if your soil needs extra magnesium. If needed, mix 1 tablespoon of Epsom salt into a watering can for every 9 square feet of garden area. Always measure the Epsom salt properly before mixing it with water. Using the right amount ( 1 tbsp or 15 grams) will help you to avoid overfeeding your plants.
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Once measured, mix the Epsom salt thoroughly with water until fully dissolved.
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Spray this mixture into the soil near the roots of Hydrangeas.
You can repeat this process every two to four weeks. For your plants to get all the essential nutrients, make sure that you cover the entire area around the plant.
Does Epsom Salt Change the Colour of All Hydrangeas?
Not every Hydrangea has the ability to change flower colour, but a few species like Hydrangea macrophylla and Hydrangea serrata are exceptions.
In other hydrangea species (except Hydrangea macrophylla and Hydrangea serrata), epsom salt doesn't contribute to changing the flowers' colour. Rather, the colour change actually depends on how much aluminium the plant can absorb from the soil. The soil pH affects this directly. In acidic soil, the plant takes up aluminium easily, which turns the flowers blue. But in alkaline soil, it becomes harder for the plant to absorb aluminium, which eventually causes pink blooms.
Magnesium Sulfate (Epsom Salt) only adds magnesium and sulfur to the soil, but doesn't affect the soil's pH or aluminium levels. So, Epsom salt won't change the Hydrangea Flower Colour.
How to Care for Hydrangeas?
Using Epsom salt for Hydrangeas is a good way to take care of them if they lack essential nutrients like magnesium and sulfur. But, there are other simpler methods that can help your hydrangeas bloom beautifully and add a charming vibe to your garden.
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Hydrangeas grow best in fertile and moist soil that drains well. If the soil stays too wet, the roots can rot, leading to fungal Growth. To avoid this, ensure excess water drains away instead of pooling around the roots. Good drainage also helps the plant to absorb Epsom salt better.
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If your soil doesn't contain enough nutrients, mix some compost to make it richer. You should also use a balanced N-P-K fertilizer and use it a few times a year. Remember to follow the instructions on the packet so that you don't overfeed your plant.
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Hydrangeas like shady areas, but they still need about 6 hours of sunlight every day to grow well and produce healthy blooms.
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They need regular watering, about once a week, so the soil doesn't become dry. Epsom salt helps the plant to keep some moisture, but always check the soil before watering. If the soil feels wet, don't add more water. Water only when the soil feels dry.
Conclusion
Using Epsom Salt for Hydrangeas is a good option, but only when your plant needs extra magnesium. Epsom Salt helps in healthier Growth when used in the right way in the right amount, but it doesn't change flower colour. With the fertile soil, proper care, and regular watering, hydrangeas can bloom beautifully in your garden and make your garden look more charming than ever.