2. Do you have a story to share? Stunted slow growth with yellowing leaves is a symptom of over watering. Your grass will have shallow roots and will suffer from poor uptake of nutrients, oxygen and even water itself, causing the lawn to start turning yellow. How to Treat an Over-fertilized Lawn. Another major reason that can cause yellow patches in the grass is over-fertilization. It may be due to cutting it before it gets established and a strong root base. Overwatering your lawn will also cause fungal diseases and insect infestation due to reduced resistance. But for getting the lawn established I would not cut it for a few weeks and cut back on the watering if you think you are watering too much. Plus, it will trigger your grass to sink energy into new leaf growth, when it should be focusing on a full recovery. As the sod fails, weeds will pop up because of the excess water. I always prefer using organic fertilizers with high nitrogen content. Buttercups, speedwell, crabgrass and broadleaf weeds cropping up in the sod lawn are all sure signs that the grass is on the decline and weeds are taking over. This is a very late symptom of over watering that's been going on for a long time. The hot weather can dry out your lawn and make it turn yellow - a particular problem at this time of year. Can grass be overwatered? Some clear signs of over watering a lawn include: severely compacted soils, the presence of Necrotic Ring Spot lawn fungus, the abundance of insect pressure, mold, root rot, and a shallow root system.Over watering a lawn is much worse for the grass and trees than under watering a lawn because a lawn that is watered too much will starve the soil of oxygen. With excessive amounts of calcium and magnesium, the grass may not get enough iron or nitrogen. I did a lot as I grew up in terms of caring and tending for not only my families lawn but also my neighbors. The most commonly imbalanced nutrients include a deficiency of iron or an excess of phosphorous. As the grass burns, it turns yellow and starts to die. Irrigate the grass when the top 2 inches of soil become dry, applying 1 to 2 inches weekly. Over-watering will also cost you more on the water bill if you have a water meter. A lawn with yellowing spots and strips may be suffering from nutrient deficiency. Reddish-orange grass is a symptom of rust fungus, which occurs in stressed lawns. The grass has been cut almost every week after I put in the new grass. Plus, trees prefer to be watered deeply.” Signs of Overwatering Trees. Note water loving yellow nutsedge sprouting in … Hi Dee, thanks for writing in. When you have weeds growing alongside grass, they fight for available water in the roots & at the surface which means there is less water to keep your grass alive.. To free up the water available to your lawn, hand-pull weeds out by the root so that they stop stealing water from the grass you’re trying to maintain. But when your grass turns yellow out of season or in spots, it can be because of troubles at the roots -- with the soil. I recently put fertilizer on my lawn & I think it got fertilizer burn because there’s lots of yellow spots all over the lawn. I got rid of a shed in my back yard 1yr ago & noticed a big bare spot I’ve tried to reseed with Pennington pencoated seed. Examine your lawn to diagnose the problem. Sometimes, this is called leaf scorch. Water interferes with healthy grass growth and makes the lawn susceptible to weeds, pests and diseases. Grass soaks up the most water early in the morning, before the soil has baked under the heat of the sun. Brown patches in the lawn & Brownish spots and brown, spiked fruiting structures appear on the leaf blades. When cooler temperatures and more frequent rains return, a well-managed lawn will make a complete recovery. The new grass shoots should look crisp and vibrant. All you have to do is to run a power core aerator over the lawn to pull up plugs of dirt. You know the poor results of too little irrigation, but overwatered grass is unhappy grass too. We have two dogs and of course there are pee stains on the grass. Or if you want a Done For Your Application then checkout GetSunday which is a fertilizer subscription service for the rest of us. Some lawn diseases manifest as yellow to brown patches. Watering is usually not necessary over summer. Watering Lawns. OK, I have TruGreen/Chem Lawn take care of my grass fertilizing. If your grass is still turning brown despite watering and fertilizing the issue could be a fungal disease or issues relating to your soil’s pH levels. Plants may suffer from leaf scorch or leaf burn. The evidence? Leaf fall occurs in both situations of too much water and too little water. If your grass squishes a few hours after watering, that’s a sign. Do a soil test to determine what nutrient is deficient and buy a fertilizer with the right NPK amounts. Grass that is over watered will eventually develop a shallow root system. Problems Caused by Over Watering a Lawn. If you have dogs that pee in your lawn, you may start to see yellow spots all over the yard. This is especially true for synthetic fertilizers. Try reducing the amount of water when irrigating your lawn to the recommended level for your grass type. Other symptoms include an abundance of weeds like crabgrass and nutsedge, thatch and fungal growth like mushrooms. Before treating the yellow grass, it is crucial that you first find out what the source of the problem is. The simplest and often most obvious is that the blades of your lawnmower are no longer sharp enough. You might have to water the area everyday for a week, and put in compost and rock dust to compensate for lost minerals.