# Lawn care calendar for Nebraska: when to fertilize and seed

> Nebraska lawn calendar for east and west: feed bluegrass and fescue by date, overseed late summer, warm-season grass in May and July. NOAA frost dates.

Canonical: https://lucernel.com/guides/lawn-care-calendar/nebraska
Last updated: 2026-11-09

Nebraska Extension publishes two cool-season lawn calendars, one for eastern and one for western Nebraska, that differ by about a week and a half, plus separate advice for buffalograss and zoysiagrass. Its feeding plan also changes with the age of the lawn: newer lawns get more nitrogen than older ones.

**Feed Nebraska cool-season lawns in late April or May, early June, late August to mid September and mid-October, and overseed in mid-August to mid-September.** Nebraska Extension’s calendars for Kentucky bluegrass and tall fescue put a first feeding of 0.75 to 1 pound of nitrogen per 1,000 square feet on newer lawns on April 25 to May 1 in the east and May 1 to 10 in the west, 0.5 pound in early June, 0.75 to 1 pound in late August to mid-September and 0.5 pound on October 15 to 30. Older lawns need far less: 0.5 pound in early June and 0.5 to 1 pound in mid-September, with spring and October feedings optional. Overseeding is August 15 to September 15 in the east and to September 5 in the west. (Nebraska Extension, NebGuides G2356 and G2359)

| Month | Eastern Nebraska, cool-season lawns | Western Nebraska, cool-season lawns | Warm-season lawns (buffalograss, zoysiagrass) |
| --- | --- | --- | --- |
| January | Dormant | Dormant | Dormant; no fertilizer September to February |
| February | Dormant | Dormant | Dormant |
| March | Wait for growth | Wait for growth | No mowing, watering or feeding; crabgrass preventer from when 2-inch soil reaches 55 F |
| April | Begin mowing; April 25 to May 1: feed newer lawns 0.75 to 1 pound N, aerate, first preemergence; overseed to May 15 | Begin mowing; overseed April 25 to May 15 | Preemergence window open March to June |
| May | Overseed to May 15 | May 1 to 10: feed newer lawns, aerate, first preemergence | After green-up in May or June feed 1 pound of nitrogen |
| June | June 1 to 15: feed 0.5 pound; second preemergence | June 10 to 20: feed 0.5 pound; second preemergence | Feed 1 pound if not yet done; mow 2.5 to 3.5 inches |
| July | June 25 to July 4: grub preventive if the lawn has a history of grubs; water 1 inch a week | Same grub window; water 1 inch a week | Feed another 1 pound of nitrogen in July or August |
| August | August 15 on: overseed; August 25 to September 5: feed newer lawns 0.75 to 1 pound | August 15 to September 5: overseed; August 25 to September 15: feed newer lawns | Second feeding window; herbicides often not advised in peak summer |
| September | September 1 to October 15: fall preemergence if winter annual weeds; September 15: feed older lawns 0.5 to 1 pound; aerate September 20 on | September 1 to 15: feed older lawns; September 1 to 20: aerate | No fertilizer; broadleaf perennial weeds are best treated in fall |
| October | Aerate to October 20; October 15 to 30: feed newer lawns 0.5 pound; keep mowing until growth stops | October 15 to 30: feed newer lawns 0.5 pound; keep mowing | Broadleaf weed control in September and October |
| November | Last mowing when growth stops | Last mowing when growth stops | Dormant |
| December | Dormant | Dormant | Dormant |

Fertilizer rates are pounds of nitrogen per 1,000 square feet from the NebGuide tables; the older-lawn column in the guide gives no or 0.25 pound in spring and October.

## Which grasses grow where in Nebraska

Nebraska Extension’s lawn calendars cover Kentucky bluegrass, tall fescue and other cool-season grasses such as perennial ryegrass and fine fescues, which make up most lawns. Its separate NebGuide for warm-season lawns covers buffalograss and zoysiagrass, which are not fed, mowed or watered in early spring.

The guide splits the advice by lawn age: newer lawns, under about 20 years old, often struggle in soil low in nutrients with high weed pressure, while older lawns need less fertilizer and have lower weed pressure. That is why the same date can mean 1 pound of nitrogen on a new lawn and nothing on a mature one.

## Frost dates from NOAA

Dates are the NOAA 1991-2020 normals for the last spring and first fall 32 F freeze at 50% probability. Omaha Eppley Airfield averages April 18 and October 21, Lincoln Municipal Airport April 24 and October 13, Scottsbluff Heilig Field May 5 and October 4, and North Platte Regional Airport May 11 and October 1.

Counting the days gives about 186 frost-free days in Omaha, 172 in Lincoln, 152 in Scottsbluff and 143 in North Platte (our arithmetic). North Platte has about two months less than Omaha, which fits the western calendar starting its first feeding a week or so later than the eastern one.

## Spring

Both calendars begin mowing in April at 3 to 3.5 inches for the whole summer, never taking more than a third of the leaf at once. The first feeding for newer lawns is 0.75 to 1 pound of nitrogen, combined with a preemergence herbicide when the soil 4 inches down reaches 55 F. Older lawns can skip it, or take up to 0.25 pound, if color and density are fine.

Aeration with hollow tines and summer patch prevention are paired with the first feeding for lawns that need them. The guide says to apply fungicide for summer patch when the 2-inch soil reaches 65 F, only on lawns with a history of the disease, and to repeat it four weeks later. Spring overseeding runs April 25 to May 15, with core aeration before or power raking after for seed-to-soil contact.

## Summer

Early June brings the second preemergence herbicide and a 0.5 pound feeding for all ages of lawn (June 1 to 15 in the east, June 10 to 20 in the west). The calendar says a lawn needs 1 inch of water a week from June to September, including rain, and that overwatering weakens turf. Scouting for dollar spot and brown patch is advised, but fungicides are not usually recommended for home lawns.

For buffalograss and zoysiagrass, the warm-season NebGuide says to mow 2.5 to 3.5 inches all season and that more problems arise from overwatering than underwatering. It puts 1 pound of nitrogen per 1,000 square feet after green-up in May or June and a second 1 pound in July or August, with no fertilizer from September to February and none in early spring.

## Fall

Fall does the most for a cool-season lawn. Overseed August 15 to September 15 in the east and August 15 to September 5 in the west, and feed newer lawns 0.75 to 1 pound of nitrogen from late August. Older lawns get one fall application of 0.5 to 1 pound around September 15, with 30 to 50 percent quick-release nitrogen. Nebraska Extension’s 2026 fertilization article says the same in plainer terms: fertilize lightly in spring and early summer, apply little or none in summer and put most of the nitrogen on after Labor Day.

Aeration is a September to October job (to October 20 in the east), a fall preemergence herbicide goes on from September 1 to October 15 for lawns with henbit or annual bluegrass, and fall is the ideal time to spot-spray broadleaf perennials such as dandelions. A last 0.5 pound feeding for newer lawns is October 15 to 30, and mowing continues until growth stops.

## Fertilizer rules and soil tests

The Nebraska Department of Agriculture runs its fertilizer program as consumer protection under the Nebraska Commercial Fertilizer and Beneficial Substance Act, with licensing, registration and tonnage fees. I found no state limit on phosphorus in home lawn fertilizer on that page.

Nebraska Extension says soil type and pH strongly affect phosphorus and potassium needs, and advises leaving an unfertilized buffer strip around water bodies so phosphorus fertilizer does not reach the water. The lawn fertilizer calculator on this site turns the pounds of nitrogen in each calendar row into pounds of product for the bag you bought.

## Frequently asked questions

### When should I fertilize my lawn in Nebraska?

Cool-season lawns: late April or May (newer lawns), early June, late August to mid-September and mid-October, with rates of 0.5 to 1 pound of nitrogen per 1,000 square feet. Buffalograss and zoysiagrass: 1 pound after green-up in May or June and 1 pound in July or August.

### When should I overseed a lawn in Nebraska?

August 15 to September 15 in eastern Nebraska and August 15 to September 5 in western Nebraska. Spring overseeding is April 25 to May 15 in both.

### How tall should I mow a Nebraska lawn?

Cool-season lawns at 3 to 3.5 inches all summer; buffalograss and zoysiagrass at 2.5 to 3.5 inches. Remove no more than a third of the leaf at once.

### How much water does a Nebraska lawn need?

About 1 inch a week for cool-season grass, counting rain and irrigation. For buffalograss and zoysiagrass, Nebraska Extension says overwatering causes more problems than underwatering.

### Can Lawnzo help me manage a Nebraska lawn?

Lawnzo for iPhone plans each lawn from its grass, sun and irrigation, and holds a job back when the forecast says so. It states its reason, and the journal keeps your products and what you spent.

## Sources (checked 2026-10-02)

- [Nebraska Extension, G2356 Cool Season Lawn Calendar: Eastern Nebraska](https://extensionpubs.unl.edu/publication/g2356/2023/html/view)
- [Nebraska Extension, G2359 Cool Season Lawn Calendar: Western Nebraska](https://extensionpubs.unl.edu/publication/g2359/2023/html/view)
- [Nebraska Extension, Management for Warm Season Grass Lawns in Nebraska](https://turf.unl.edu/turf-advice/turf-fact-sheets-nebguides/WSG-lawns-nebraska/)
- [Nebraska Extension, Fertilization in Home Lawns](https://turf.unl.edu/news/fertilization-home-lawns/)
- [Nebraska Extension, Lawn Aerification](https://turf.unl.edu/turf-advice/turf-fact-sheets-nebguides/lawn-aerification/)
- [Nebraska Department of Agriculture, Fertilizer and Ag Lime](https://nda.nebraska.gov/plant/fertilizer)
- [NOAA NCEI 1991-2020 normals: frost dates for Omaha, Lincoln, Scottsbluff and North Platte (API query)](https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-annualseasonal-1991-2020&stations=USW00014942,USW00014939,USW00024028,USW00024023&dataTypes=ANN-TMIN-PRBLST-T32FP50,ANN-TMIN-PRBFST-T32FP50&format=json)
- [NOAA NCEI, U.S. Climate Normals 1991-2020 (product page)](https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals)