Written by Evie Baltzer, LawnAmerica Horticulturist
Are your Azaleas bright green or yellow in color?
If so, you may have pH problems with the soil around your plants.
You can determine if it’s a pH problem by inspecting the leaves a little more closely. If portions, or in severe cases, all of the leaves on the plant are a bright green to yellowish color, but still have clearly visible green veins, then you have a pH problem.
Left untreated, it will eventually kill the plant. Thankfully, there is an easy remedy.
Azaleas require acidic soil within the pH range of 4.5-6.0. If the soil around the Azalea becomes more alkaline and goes above 6.0, which often happens in our area, then the plant and its subsequent blooms will suffer.
There are several things a homeowner can do to help remedy this problem. Applying Sphagnum Peat, Aluminum Sulfate or Ferrous Sulfate are among the easiest solutions.
Sphagnum Peat and Aluminum Sulfate can usually be found at your local nursery/garden center or at most big box home improvement stores. Two inches of Sphagnum Peat can be added around the root ball of the plant and then tilled into the top eight inches of soil.
Follow directions on the package for Aluminum Sulfate to ensure proper amounts are added. You can also add a thin layer of Sphagnum Peat to Azaleas every year to try to preserve optimum pH levels.
At LawnAmerica, we use Ferrous Sulfate, which is a powdered form of Sulfur. It’s easy to apply, works well, but unfortunately is harder for a homeowner to come by.
In most cases, once you’ve amended the soil with any of these products, you’ll see the leaves start to change back from bright yellowish to its regular green color in about two months or less.
And as always, if you have any questions regarding your property, contact LawnAmerica today.