When diluted with water, all kinds of plants grow and can take up the magnesium quickly and benefit from it greatly. Also known as a bath salt or magnesium sulfate, Epsom salt consists of magnesium, oxygen, and sulfur which are helpful for rose plant growth.Magnesium is essential for plants to produce chlorophyll, which is an integral part of photosynthesis. The chemical makeup of Epsom salts is simple. When you plant the roses, begin by soaking the roots of the plant in a solution of Epsom salt and water, to the tune of ½ cup salt in 1 gallon of water. When diluted with water, Epsom salt is easily taken up by plants, especially when applied as a foliar spray. I don't cover the Epsom salt with soil and prefer to let the rain saturate and dissolve it over time. This fertilization process can be used up to three times a year. Using Epsom salt for roses has long been a best friend and an excellent supplement for rose growers! Adding excessive Epsom salt to your soil can release aluminum from the soil. Using Epsom salts like this as a fertilizer supplement can solve the problem. It is hydrated magnesium sulfate. These roses are sometimes referred to as “salt roses”. Plants like rose, tomatoes and peppers, on the other hand, require lots of magnesium, and therefore, are more commonly watered with Epsom salt. Tips for Growing Beautiful Roses Do your Epsom salt treatment at least three times a year. Important Things to Note Too much Epsom salt can make the soil acidic, which will destroy the nutrients in the soil that the plant needs to grow. Release Aluminum From The Soil. As you all know, aluminum is a toxic metal to plants and even the living organisms that live in the soil.. Aluminum toxicity in plants makes the root tip cells to stop root development. After a hard day of weeding, a good long soak in an Epsom-salt bath soothes aching muscles. You should never add Epsom salt to your garden when the rose bush is in direct sunlight. While blooming, rose bushes can suffer from a lack of magnesium causing a magnesium deficiency. But did you know that Epsom salts give roses a boost as well? Learn how the master gardener grows happy, healthy and beautiful roses by using simple, inexpensive Epsom salts.. Allow the roots to soak in this solution overnight, as it will help in reducing the stress that is caused on the plant in the process of transplantation. I usually trim off any signs of damage or winter-kill and apply the recommended amount of slow release fertilizer with about 1/2 cup of Epsom salts per rose around the base of the rose bush. If your rose bushes are starting to droop, it’s time for an Epsom salt treatment to revive the branches Yellowing leaves may also be another cause for needing Epsom salt. What is Epsom Salt? The Benefits Of Epsom Salts For Roses. It also aids the plant in the absorption of phosphorus, which helps to boost plant growth and promote abundant blooms.