Can you spray ferrous sulfate on the leaves of azaleas?
This article brings you the knowledge of whether you can spray ferrous sulfate on the leaves of azaleas. The following editor will provide you with a detailed explanation.
Can you spray ferrous sulfate on the leaves of azaleas?
Even if the leaves of azaleas are not yellow, it is necessary to water with ferrous sulfate regularly to prevent iron deficiency. If planted in the south, the soil itself is acidic, and iron deficiency usually does not occur, so it can be used. In the north, it is necessary to use ferrous sulfate or alum fertilizer water regularly to prevent iron deficiency and provide an acidic soil environment for azaleas.
Why do azaleas need ferrous sulfate?
Azaleas prefer acidic growing conditions. They are relatively easy to cultivate in the south, where the soil is naturally acidic and suitable for their growth.
However, in the north, the problem that is difficult to solve is the issue of acidic soil. Although we can improve the soil by adding some acidic substances such as sawdust and decomposed leaves, the soil and water in the north are alkaline.
After a period of time, the soil becomes alkaline again. In alkaline soil, azaleas grow poorly and are prone to iron deficiency and yellowing.
Applying ferrous sulfate can solve this problem. Ferrous sulfate is a type of iron fertilizer that can supplement iron and is acidic, providing an acidic soil environment.
How to use ferrous sulfate
There are two ways to use ferrous sulfate: direct root watering and making alum fertilizer water.
Direct root watering is a convenient method. Simply dilute the ferrous sulfate 2000 times and water the roots.
Note that ferrous sulfate should not be used too frequently. Generally, it is sufficient to use it once every 1-2 months. Overuse can increase soil salinity, which is not conducive to root growth.
Another method is to make alum fertilizer water, which is a fertilizer water invented by a netizen and has good effects on acidic flowers.
Alum fertilizer water preparation method: Mix ferrous sulfate, dung, cake fertilizer, and water in a ratio of 1:3:5:100, then let it fully decompose into a black-green fertilizer water solution.
The method of using alum fertilizer water is simple. Take the supernatant of the alum fertilizer water, dilute it with water, and then water the flowers.
Do you need to use ferrous sulfate if the leaves of azaleas are not yellow?
If planted in the south, the soil is naturally acidic, and iron deficiency usually does not occur, so it can be used.
In the north, it is necessary to use ferrous sulfate or alum fertilizer water regularly to prevent iron deficiency and provide an acidic soil environment for azaleas.
The above is the full content of whether you can spray ferrous sulfate on the leaves of azaleas. Have green plant enthusiasts understood?