Can you Overseed and Fertilize at the Same Time?

Can you Overseed and Fertilize at the Same Time

Fertilizer is used for many different reasons depending on the type. They help to boost the growth of a seed that is planted whenever it is applied. But the question about overseeding and fertilizing at the same time still stands. When you are overseeding your lawn, at some point, you will need to apply some fertilizers to aid in the growth of your grass. Nonetheless, as a gardener, when you are applying fertilizers, some brands like corn gluten fertilizers work out differently in your lawn.

As you are preparing your lawn for the next overseeding process, you may opt to apply the corn gluten fertilizer. This fertilizer can prevent the growth of weeds on your lawn if applied before you overseed your lawn. However, if you do the wrong timing and put both the corn gluten fertilizer and overseed at the same time, your grass seeds will not germinate. Additionally, the majority of fertilizers work with a similar concept when applied at the same time as grass seeds.

Nevertheless, some fertilizers do not have any effects on seeds when they are applied together. Thus you can mix your fertilizer, seed, and broadcast together. The application of fertilizers does not require much work or time. Hopefully, as you read this article, you will get to know more about overseeding and application of fertilizers at the same time. Moreover, what are the alternatives to use and guarantee total success on your lawn?

Also Check: Can You Overseed Without Topdressing?

Initial Fertilizer Application

As you plan to overseed your lawn, you should first prepare it with an initial fertilizer. This fertilizer will lay the nutrients foundation for the seed to have the right germination environment once they are on the ground. As a gardener, you can broadcast the fertilizer first then the seeds to follow immediately. Moreover, the method of broadcasting is not specified. On the other hand, you may opt to place both seed and fertilizer at the same time. Hence, it is okay to overseed and fertilize at the same time. However, the gardener should be wary of the fact that if there is no proper mixing of the fertilizer and seeds, there may be an uneven growth after application. Thus, the two ingredients should be thoroughly mixed for better results.

What Happens When You Fertilize After Overseeding?

The initial fertilizer applied will be used by the grass seed for nutritional supply as they begin to sprout. The seeds need to grow under moist conditions; hence, the first fertilizer will be effective for this purpose. However, it will quickly wash out after a short period leaving your lawn and the growing grass less satisfied. So what happens when you fertilize after overseeding? Because you need consistency in your lawn, you need to acquire and apply a second fertilizer. This application is mainly done after four weeks when the growing grass has already sprouted. The second fertilizer is applied to boost seed germination and to strengthen both growing and mature grass.

How to Keep Your Lawn Healthy?

To have a healthy lawn that is consistently productive, you need to maintain the discipline of taking care of it thoroughly. The maintenance practice includes boosting it with fertilizers, especially in the spring and autumn seasons. Thus, come winter, with proper preparation, your grass will survive the harsh conditions. Moreover, during the two seasons, you may opt to overseed and apply fertilizers simultaneously rather than doing one practice before the other.

A healthy lawn with green grass throughout will be a massive boost to discourage the growth of weeds. Hence, there will be more grass and less room for weeds growth. Also, after seven days without rain, consider watering your lawn. The best way to go about it is to water deep into the grass occasionally rather than watering shallowly and frequently. Frequent shallow watering takes time before the water gets to the base of the grass. Moreover, it uses a lot of water and provides average results.

How to Overseed And Fertilize at The Same Time For The Winter Season?

Winter is the toughest season for any crop or plant to survive. Therefore, to improve the chances of survival, every gardener understands that it is best to prepare early. For grass, it is quite simple to prepare for winter. The best way to go about it is to apply a seasonal grass seed that will survive throughout the winter season.

Before planting, mow your lawn low, then, using a rake, remove any debris and grass that may be lying around. After preparing your lawn, put in place both fertilizer and seeds of the seasonal grass. They should be thoroughly mixed to encourage growth all around the lawn. After broadcasting, keep the lawn moist until the seeds start to sprout. After a while, reduce the watering and let the grass settle in and grow as winter approaches.

Solve The Problem of Overseeding Frequently

Are you wondering why everyone has had to prepare your lawn for overseeding? You are getting frustrated and wondering what is not right. Well, there maybe there is a specific reason as to why your lawn reproduction rates are not consistent. How do you apply your fertilizers? Fertilizer application is key to consistent reproduction.

It should be applied slightly before overseeding or mixing it with the seeds and broadcasting together. Also, it would be best to keep records because, after four weeks, you need to apply a booster fertilizer. However, you could get some soil from your lawn and take it for a quick test. The soil test results will help you understand what your soil lacks; you will also know more about nutrient balance when planting grass or overseeding.

Weeds should be a great concern on your lawn. If they are there, you need to apply herbicides if they are many or dig them out. Weeds often take up most of the soil nutrients that are meant for use by grass. Hence, your grass will often dry because of a lack of nutrients. Also, if you have various species of grass planted, you should figure out the specific species that are using up more nutrients than required and get rid of them. Therefore, opt to plant one species that is easy to control and reproduces throughout.

Advantages of Using Fertilizers And Overseeding at The Same Time

The main advantage of applying fertilizers and overseeding at the same time is that the process is more efficient in providing better results. For the process to work, you need to have accurate measurements of your lawn and the amount of seed and fertilizers needed. Failure to which, you may apply one substance more than the other, which will result in low grass growth. Moreover, when applying the seeds, it is advisable to use a spreader rather than applying by hand. The spreader will be more accurate in equivalent distribution all over the lawn.


1. When is the best time to overseed and fertilize?

Both fall and spring are the best times to overseed and fertilize your lawn. With adequate preparation, you will be sure that your grass will survive winter. During these seasons, you will have ample time to prepare your lawn and plant or overseed.

2. Do you fertilize or overseed first?

It does not matter which process comes first; however, fertilization is key to a successful lawn. Moreover, adding fertilizer at the same time as your seed is important. You can combine the seeds and fertilizers and broadcast. Also, you can fertilize first then seed immediately after.

3. Should you aerate before overseeding and applying fertilizers?

Yes. Aeration is key to improving your grass growing rate. It provides more room for air circulation, water infiltration, and also nutrient distribution in the soil. Hence, it is important to aerate the lawn before overseeding and applying fertilizers. Also, you will improve the chances of successive growth in your lawn.

4. What happens when you have a wrong nutrient balance when overseeding?

There is a higher chance the grass will not grow. Therefore, it is advisable to have accurate measurements of the lawn to help you calculate the number of seeds and fertilizer to be used. Also, it would be best if you used a spreader to distribute the seeds and fertilizer evenly in the garden, unlike using hands.

5. Is it okay to fertilize after overseeding?

Yes, it is fine to fertilize after overseeding. The fertilizer can be applied immediately and after four weeks. This routine will improve the chances of having a productive lawn as it strengthens even the mature grass.

Final Verdict

Overseeding can be achieved in various ways. Moreover, the farmer should know when to put fertilizer on the lawn to enable effective planting. Therefore, applying fertilizers together with seeds boosts the chances of having a fruitful lawn compared to the separate application of the products. Nonetheless, it would be best to understand more about the grass seeds you are planting and the soil composition. This will guide you in the amount of fertilizer to use, as some grass seeds require more nutrients than others.