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How often should I fertilize?

As a general rule we fertilize 3 to 4 times a year. (Easter, Memorial Day, Labor Day, and Halloween)  If you choose to fertilize once, do it in the fall; twice, fall and spring.

What type of fertilizer is best?

Use a fertilizer that is blended for our Colorado soils like our ScienTurfic 20-10-10 with iron and sulfur. 

Should I use a winterizer in the Fall?

An application around Halloween will feed your lawn during the winter months.

My grass looks yellow. What does it need?

Yellow means the grass blades are not getting enough nutrients. Apply some fertilizer.

Should I use a wetting agent like Revive?

Revive can be used to help water penetrate into the soil. Remember to read the label for proper application rates.

What is the best way to control crabgrass?

By applying pre-emergent herbicides. Read the label for proper usage. Establishing a dense and healthy stand of turfgrass is the best way to control crabgrass and other annual weeds, including grasses and broad-leaf weeds. 

Is it okay to use weed and feed on my newly installed lawn?

No. Pre-emergent herbicides could harm newly formed roots.

Is it okay to use weed and feed on my existing lawn?

Yes. Weed ‘n feed is an herbicide and fertilizer combination product that is used to kill weed seeds and feed the grass at the same time. Many feel if you have a weed problem, apply an herbicide. When grass needs nutrients the feed with fertilizer.

When should you apply a weed ‘n feed fertilizer?

Weed ‘n feed contains a pre-emergent which must be applied before weed seeds germinate.

What is the single most important thing you can do for your lawn?

It is important that you provide proper nutrition. Each year you don’t fertilize, the nutrients in the soil become further depleted.

What are some problems that may develop without fertilizing?

The grass is unable to handle the extremes of weather, stand up to insect pests and diseases. Eventually soil becomes son infertile and your grass so weak, weeds begin to dominate.

What do the 3 numbers on the fertilizer bag mean?

They refer to the percentages of nitrogen, phosphorus and potassium.

Why is nitrogen, phosphorus and potassium important?

Nitrogen – growth, color, density and chlorophyll

Phosphorus – growth of new roots and rhizomes; plant vigor

Potassium – Plant health; stress resistance; cold hardiness

If a lawn is short of nutrients, what is the first thing that changes?

The lush green begins to fade. Over time the lawn thins, loses resiliency, provides habitat for weeds, disease and insects.

What problems might occur if you over fertilize your lawn?

Over fertilization stimulates leaf growth at the expense of the roots. With a thin shallow root system the lawn can’t tolerate heat and drought. Over fertilization promotes thatch.

What is the most important micronutrient?

Iron. It is involved in chlorophyll production. A lawn that is deficient in iron turns yellow.

Which type spreader is best?

ScienTurfic recommends a cyclone or rotary spreader.  It will apply the granules more evenly, which avoids dark green and yellow strips that often happen with a drop spreader.

Why is it important to sweep sidewalks, curbs and gutter after applying fertilizer?

If the fertilizer contains iron, the pellets when wet will stain sidewalks, curb, gutters and swimming pools.

What method is used to determine how many square feet a bag will cover?

Application rates are determined by multiplying the first number, which represents the percentage of nitrogen contained, times the weight of the bag. Using the ScienTurfic fertilizer which has a formula of 20-20-10-2fe-3s, multiply the first number (20%) by the weight of the bag (20 lbs) which will equal 4 (lbs of nitrogen). If you want to apply 1 lb of nitrogen per 1000 square feet this bag will cover 4,000 square feet.

Does a big bag always mean “big value”.

Not always. Let’s compare a 20 lb bag with the numbers of 20-20-10-2fe-3s and a 40 lb bag with the numbers of 10-5-5, both covering 4,000 square feet. Remember the total of the numbers represent the percentage of total nutrients in the bag. The 40 lb bag will contain 20% nutrients with the rest being filler, while the 20 lb bag will contain 55%. 20% of 40 lbs will equal 8 lbs of nutrients compared to 55% of 20 lbs which will equal 11 lbs. Obviously in this case the 20 lb bag is the best deal, if both were the same price.

What else does the number 20-20-10 mean?

In this example, it is the percentages of the 3 elements. Dividing these numbers by 10 leaves a 2:2:1 ratio.

What should be the goal of a good fertilizer program?

The goal should be to produce reasonable amount of top growth but not at the expense of root growth and carbohydrate storage.

Why should you water after applying fertilizer?

This eliminates the danger of burning the grass blade. Of more importance it gets the fertilizer down to the roots so that it may be used by the plant.