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Bluegrass Maintenance

Maintenance Guides by Brand

Seasonal Guides for Your Bluegrass Maintenance
SUMMER
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Mowing

When mowing during the summer, bluegrass usually performs best at a height of 2.5–3.5 inches. Never remove more than 1/3 of the leaf blade at a time. If you remove more than that, you will stress the grass and it may go brown for a short time. Taller blades provide more shade for your root system to stay cool and retain moisture during the hot summer days. If you are returning from vacation, you may have to mow multiple times to get the grass back to the desired height. Wait about three to five days between each mowing.

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Watering

Do not overwater the grass. Bluegrass only needs about one inch of water weekly. Water for longer periods of time, less frequently and in the early morning hours. Take rainfall into consideration.

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Fertilization

For optimal results, feed your lawn monthly during the summer season by applying the Lawnifi Summer Box liquid fertilizer program.

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Weed Control

It is not recommended that you apply an herbicide at this time because when temperatures exceed 85 degrees Fahrenheit, the herbicide will damage the grass. Common weeds to look out for include knotweedspurgelespedezacrabgrassgoosegrassdallisgrassnutsedge and sandspur.

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Insect Control

Check for and control white grubs in July and August. Treat with an insecticide if needed. If you use a granular variety, water the lawn immediately after application to help soil absorption. August is the best time to control grubs because they are small and feeding near the soil surface.

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Fungus Control

Bluegrass is highly susceptible to brown patch disease, which appears as irregularly shaped patches of dead or dying turf. Do not apply nitrogen fertilizer when the disease is active, keep the mowing height above three inches and water between 2:00–8:00AM. Apply a fungicide like Heritage G during severe brown patch outbreaks. If you use a granular fungicide variety, water the lawn immediately after application to help soil absorption.

FALL
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Mowing

Mow your bluegrass at a height of 2.5–3.5 inches in height during the fall.

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Watering

Bluegrass requires about 1–1.25 inches of water every week including rainfall and supplemental irrigation. Don’t overwater.

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Fertilization

For optimal results, feed your lawn monthly during the fall season by applying the Lawnifi’s Fall Fertilizer Box or apply Lawnifi Foundation once every three months.

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Weed Control

Apply pre-emergent herbicides to control winter annual and perennial weeds like chickweedhenbitPoa annuacrabgrass or goosegrass. Apply post-emergent herbicides only when weeds are present.

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Insect Control

Check for and control any white grubssod webworms or fall armyworms. Treat with an insecticide if needed. If you use a granular variety, water the lawn immediately after application to help soil absorption.

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Fungus Control

Apply fungicide if needed. If you have had a fungus or disease in your bluegrass in the past or have quite a bit of shade in the yard, apply a systemic fungicide to prevent future outbreaks. Consider mapping those areas because fungicide treatment can be expensive. If you use a granular variety, water the lawn immediately after application to help soil absorption.

SPRING
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Mowing

Don’t make the mistake of mowing your bluegrass lawn too short. Keep your lawn between 2.5–3.5 inches in height with a rotary mower that has a sharpened blade. Never remove more than ⅓ of the leaf blade.

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Watering

Don’t overwater. Bluegrass needs about 1 inch of water a week from natural rainfall or irrigation. If you apply any granular fertilizer or control product, you will need to water it in. This is a sufficient amount of water for the week. Overwatering may promote disease outbreak. Conduct an irrigation audit to evaluate how much water is being delivered to different areas of your lawn.

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Fertilization

For optimal results, feed your lawn during the spring season by applying Lawnifi Foundation, a granular fertilizer, or the Lawnifi Spring Fertilizer Box.

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Weed Control

Apply a pre-emergent herbicide when soil temperatures reach 55 degrees Fahrenheit. This will prevent summer annual weeds like crabgrass and goosegrass from plaguing your lawn and garden. Apply post-emergent herbicides in May as needed to control annual and perennial broadleaf weeds like white clover, knotweed, spurge and lespedeza. Products containing multiple broadleaf active ingredients are more effective in controlling broadleaf weeds.

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Insect Control

Apply a broad-spectrum insecticide to prevent spring insects from appearing or to control any current spring insects like white grubs. White grubs may be active at this time. If you see any white grubs, apply a systemic insecticide.

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Fungus Control

Unlike warm season turfgrasses, there’s typically no real reason to make fungicide applications in the spring for bluegrass. If, however, you notice disease in your bluegrass, apply a systemic fungicide.

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