When your lawn grasses are well nourished and healthy they give a lush look and bright to dark green color. While if your lawn grasses give a yellow shades and light green appearance then it indicates the existence of some problem. You can easily notice the problem but exact cause of this unhealthy situation is something difficult to identify. To identify the exact cause of poor coloration of your lawn you need to consider various factors and aspects of your growing conditions as well as management practices. Once you identify the exact cause of this poor coloration then you can solve the issue your lawn grasses have.
Analysis of Your Irrigation Techniques
First the most common cause of yellow coloration of your lawn grass is lack of enough amount of moisture. The simple cause of this unwanted coloration might be non availability sufficient amount of water for nourishment. Your lawn grasses exposed to much moisture stress will fade before making them yellow, but you many not closely judge this fading mowed lawns; the yellow or pale green look of your lawn grass may be the very first and clear signal that your lawn grasses are suffering from moisture stress due to not proper irrigation or not sufficient rainfall. The whole surface of your lawn may not suffer from the moisture stress in same way, some area are suffered more severally while other areas are exposed to less intensity of this situation.
If you are using sprinkle irrigation system for watering your lawn then make sure that it distributes water to all parts of the lawn.
Also Read: Why Does Grass Turn Yellow After Cutting?
Lack of Nutrients
Nutrient deficiency especially nitrogen deficiency is another common of yellow or pale green lawn grass patches. Nitrogen is one of the most important nutrients your lawn needs for healthier and greener look. In majority of lawn this substance is in short supply. Chlorophyll gives your plants a green color. And nitrogen is the most important component of chlorophyll. If your plants lack the required amount of chlorophyll then it will leads to yellow or pale green coloration.
Iron is important mineral plays vitals in preparation of chlorophyll. So if your plant is iron deficient then chlorophyll manufacturing process is affected. This situation is called iron chlorosis.
Fertilization and Care
Non uniform fertilizer can also cause yellow coloration. In this case of some the lawn area will get the required amount of fertilizer while some are under or over fertilized. Over fertilization can burn your lawn plants so it is important to make sure that your fertilizer spreading system is capable of even distribution of it to all parts of your lawn.
Also Read: Too Much Lime On Lawn
Grass Varieties Naturally Yellow
Some undesirable grasses are pale green or yellowish. There is also a chance the poor coloration is due to heavy infestation of weed. Poa annua (annual bluegrass) is pale green even if grown under suitable and good conditions.
This weedy grass species has the ability to product plenty of speeds and can be very aggressive; especially lawns where they are weakened by less fertile soil or due to winter injury. There are some grasses varieties that are naturally pale green such as;
- Centipede grass (Eremochloa ophiuroides): zones 7 and 8 of U.S. Department of Agriculture plant hardiness
- Zoysia grass (Zoysia spp.) of zones 6 through 9 U.S. Department of Agriculture plant hardiness
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