Fertilizing Tips




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. If you chose to fertilize twice, do it in the fall and spring.

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

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

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

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

The best way to control crabgrass is by applying pre-emergent herbicides. Read the label for proper usage. Also, establishing a dense and healthy turfgrass is the best way to control crabgrass and other annual weeds, including grasses and broad-leaf weeds.

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

Yes. Weed and 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, feed it with fertilizer.

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

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

Without fertilization, the grass is unable to handle the extremes of weather and to stand up to insects and diseases. Eventually, the soil becomes so infertile and your grass so weak, weeds begin to dominate.

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

Nitrogen – growth, color, density and chlorophyll Phosphorus – growth of new roots and rhizomes along with plant vigor Potassium – Plant health, stress resistance, and cold hardiness

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

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.

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

ScienTurfic Sod 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.

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

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.

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.

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

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

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.