Guide: 15-15-15 Fertilizer on Arizona Grass

15-15-15 fertilizer is an excellent resource for sod in Arizona, but like anything, you'll want to follow best practices to achieve optimal results.

What is 15-15-15 Fertilizer?

When you pick up a bag of fertilizer, it will be defined by a set of number with hyphens. This describes the ratio of nitrogen, phosphorous, and potassium, also known as the NPK ratio. 15-15-15 fertilizer is a fertilizer that contains equal parts of each element.

What is the Best Use for 15-15-15 Fertilizer?

15-15-15 is the best option when you're installing new sod in Arizona because the soil in Arizona naturally has little to no phosphorous content.

Which Sod Responds Best to 15-15-15 Fertilizer?

Any sod in Arizona that you choose to use on your lawn will work well with 15-15-15 fertilizer. In fact, this ratio should be used on all types of sod when you're installing it on a new lawn. Bear in mind that this is the best option for new sod that isn't yet established and hasn't yet taken root because it needs an even number of elemental nutrients to take root and grow strong and healthy.

Established lawns, on the other hand, require different ratios. This is particularly because, as the sod matures and grows, the nitrogen levels change, which will affect the ratio of each element you introduce to the sod and soil. Midiron, tifway, and tifgreen homeowner grasses, as well as sports-type grasses, tend to be higher in nitrogen, have a medium phosphorous content, and have a medium to high amount of potassium. For these types of grasses, once established, a 3-1-1 fertilizer, fed every four to six weeks, is generally optimal.

Certain types of sod don't require as much nitrogen. St. Augustine, for example, shouldn't be given too much nitrogen during the fertilization process because it can be prone to disease if it accumulates too much thatch. Once this grass is established, a 1-1-1-1 or 1-2-2 ratio is recommended because it has a high amount of micro-nutrients, which will give your grass plenty of color without a lot of growth. Check out all of our sod varieties here.

What Else Should You Know About 15-15-15 Fertilizer?

More is not always better. Keep in mind that our Arizona climate can lend itself to your grass being burnt if you're not careful. Too much of a good thing can result in scorching or blemishing your lawn to an extent that can be expensive to repair. Various forms of salt can be contained within fertilizers which can often expedite the burning process once the sun and heat go to work if you're not applying the proper fertilizer to your sod in Arizona.

It's also very important to be mindful of the way in which you're spreading your fertilizer. It is incredibly essential that you spread your fertilizer evenly throughout your grounds. Uneven distribution can cause a negative plant response which can eventually leave to patches of green and yellow when you look across your landscape.

Need help understanding how to best care for your sod in Arizona? Our team at Evergreen Turf would be happy to help! Contact us today, so we can get started!

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