Many homeowners find on their own wondering how long after fertilizing can you overseed because they're terrified of accidentally killing off expensive brand-new grass seed just before it even has an opportunity to sprout. It's a valid concern. When you dump the high-nitrogen fertilizer upon your yard plus then immediately toss down seed, you might end upward with a patchy mess. However, the answer isn't usually a simple "wait fourteen days. " This really depends upon what exactly you put in that spreader.
The timing of your lawn care schedule can make or even break your fall or spring reconstruction. If you've already fertilized and you're staring at a bag of seeds in the garage, you need to know if you're safe to move forward or if you should pour yourself a drink and wait another month. Let's break down the particular timing so you don't waste your own time or cash.
The brief answer for regular fertilizers
When you just used a basic, straight-up lawn fertilizer with no weed-killing components, you should generally wait about one to two weeks before overseeding. This particular gives the nutrition a chance to settle into the ground and begin deteriorating.
The reason you don't need to do it immediately is that most standard manures are packed with nitrogen. While founded grass loves nitrogen, brand-new seedlings are a bit delicate. Think of this like feeding an infant a triple-shot coffee; it's just excessive, too soon. A high concentration associated with salts within the fertilizer can actually draw moisture from the seed products, effectively dehydrating them before they also germinate. By waiting ten days or even so, you're letting the "hot" initial burst of nutrients dissipate enough to become safe for individuals tiny green sets.
The large exception: Weed and Feed products
Here is exactly where things get complicated. If the fertilizer you used provides any type of weed preventer or weed killer inside it (often tagged as "Weed and Feed" or "Pre-emergent"), the rules modify completely.
Most weed handle products work simply by creating a chemical substance barrier in the soil that prevents seeds from germinating. The problem? That chemical barrier doesn't know the difference between a dandelion seed and the premium Kentucky Bluegrass you just purchased. If you've used a product having a pre-emergent herbicide, you typically have in order to wait at least 6 to 12 several weeks before you can effectively overseed.
Honestly, if you put down a pre-emergent in the particular spring, you're basically done with seeding until the fall. If you consider to overseed as well early after using these products, you are usually essentially throwing your cash in the trash. The seeds can just sit generally there and rot because the herbicide is usually doing exactly what it was created to do: prevent seed products from growing.
Can you fertilize and seed on the same day?
Truth be told, you actually can—provided you use the particular right product. When you haven't fertilized yet and you're about to overseed nowadays, search for something particularly labeled as "Starter Fertilizer. "
Starter fertilizers are formulated differently than your own standard "turf builder" products. They usually have an increased phosphorus content, which is the nutrient accountable for root development. In contrast to high-nitrogen maintenance fertilizers, starter versions are designed to be used at the particular identical time since seeding. They provide just enough of the boost to assist the roots get hold without burning the young vegetation.
Therefore, if you're standing in the section at the equipment store and you want to obtain everything required for one afternoon, grab the particular starter bag. You can literally distribute the fertilizer, distribute the seed, and water everything in at once.
Why the kind of grass matters
The specific lawn type you're operating with also performs a role in how long after fertilizing can you overseed . Cool-season grasses like Fescue, Ryegrass, and Bluegrass are usually typically overseeded within the early fall. During this period, the soil is usually warm but the particular air is air conditioning down.
If you fertilized in late Aug with a standard nitrogen boost, waiting until mid-September in order to overseed is ideal. This gives the existing grass a bit of a "green up" so it's healthy, but provides the new seed a window to create itself before the first frost.
Warm-season grasses like Bermuda or even Zoysia are usually overseeded with Ryegrass in the late fall for winter color, or thickened up in the late spring. Exactly the same logic applies: in the event that you've just pressed a bunch associated with growth with fertilizer, give the yard a week in order to "digest" that meals before you present new competition regarding space and sources.
What happens if you wait too long?
While the primary worry is generally about waiting long enough, there's furthermore the risk of waiting too long. When you fertilize your own existing grass plus then wait 4 or five days to overseed, your current lawn may grow so dense and fast that it crowds out your new seeds.
Existing grass is aggressive. In order to gets a strike of fertilizer, this would like to expand. When it fills within all the uncovered spots before your own new seeds have got a chance to touch the soil, those seeds will just sit on top of the particular grass blades, in no way germinate, and ultimately get eaten simply by birds or washed away by rain. You want a lovely spot where the fertilizer has settled, yet the existing lawn hasn't turned in to a jungle yet.
Signs that your soil is definitely ready
In the event that you're unsure whether or not the fertilizer has done its thing, look at your lawn. Experience it had a several good soaking down pours or watering classes? Water is exactly what moves the fertilizer through the soil profile. If you put down fertilizer plus it hasn't rained in two weeks, those granules are usually still sitting generally there, fully potent and ready to burn your seeds.
A great rule of browse is to guarantee the lawn has got a minimum of two deep waterings or one significant rain event before you start the overseeding process. This guarantees the nutrients are usually distributed and the particular "salt" effect of the fertilizer is minimized.
Techniques for the successful overseeding project
Once you've figured out the timing, don't just toss the seeds out and wish for the very best. In order to make the most of your window, follow these steps:
- Mow this low: Before you overseed, mow your present grass a little smaller than usual. This allows the fresh seed to achieve the soil quickly.
- Aerate if you can: If the ground is hard, no amount of fertilizer or seed can help. Renting an aerator to draw plugs of ground out can give these seeds a good "home" to get into.
- Maintain it moist: This is the large one. Once you've seeded, you require to water lightly and frequently. We're talking 5-10 mins, twice a day time, in order to keep the surface damp.
- Prevent the weed killer: We mentioned this particular before, but it bears repeating. Never make use of any weed killers for at least the month after your brand-new grass has sprouted. You'll kill the babies!
Finding the perfect balance
In the end, lawn care is more of an art than the strict science, yet the chemistry of fertilizer is some thing you have to respect. If you're ever in doubt about how long after fertilizing can you overseed , go overboard on the side of caution and give it a full two several weeks.
If you're a perfectionist, the ideal schedule appears something like this: fertilize having a high-quality turf food, wait 10 to 14 times, mow the lawn short, aerate, then overseed. This series gives your present grass a health boost while removing the way for your new arrivals.
By paying attention to the labels on your bags plus keeping an attention on the weather, you'll avoid the heartbreak of a "burnt" lawn and rather enjoy that heavy, carpet-like grass everyone else within the community is jealous associated with. It just will take a bit of patience plus some strategic time.