Most Indianapolis lawns are cool-season grasses such as Kentucky bluegrass and turf-type tall fescue. Purdue recommends doing most fertilizing from late summer through fall, with a light feeding in late spring and little in summer, and mowing on the high side. Companies that apply fertilizer or pesticides for hire on turf must be licensed through the Office of Indiana State Chemist.
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Lawn care around Indianapolis follows a cool-season calendar. Kentucky bluegrass, turf-type tall fescue and perennial ryegrass make up most central Indiana lawns, and they grow hardest in spring and fall, then slow down or go dormant when July and August turn hot and dry. A good program works with that rhythm instead of against it.
Know your grass
- Kentucky bluegrass: spreads by underground stems, so it fills in thin spots and recovers from wear. It looks best with fertilizer and some summer water, and can go dormant and brown in drought, then recover.
- Turf-type tall fescue: deep-rooted and more drought and heat tolerant. Purdue notes it needs roughly a third less nitrogen than bluegrass. It's a bunch grass, so bare spots need overseeding.
- Perennial ryegrass: germinates fast and is common in seed mixes, but Purdue's turf specialists don't recommend it as the main grass for Indiana lawns because it tends to perform poorly in July and August.
- Fine fescues: used in shady areas, often blended with bluegrass.
Fertilize mostly in fall
Purdue's turfgrass program recommends putting most of the year's nitrogen on cool-season lawns from late summer through fall, with a lighter application in late spring after the first flush of growth, and little or none in summer. Heavy spring and summer feeding pushes leaf growth, raises disease risk and does little for roots. A company that front-loads its program in April and June is working against the grass.
Mowing basics
- Never remove more than about one-third of the blade at one mowing.
- Mow on the high side. Purdue lists optimum ranges of roughly 2 to 3.5 inches for bluegrass and 3 to 5 inches for tall fescue. Taller grass shades out weeds and handles summer stress better.
- Keep blades sharp and leave clippings on the lawn when you can.
Soil tests and aeration
Purdue Extension doesn't run soil tests for homeowners, but county Extension offices can point you to commercial labs that do. A test every few years shows whether you need phosphorus, potassium or lime, rather than guessing. Compacted clay lawns, especially in newer subdivisions, often benefit from core aeration in fall, when cool-season grass recovers quickly.
Licensing: pesticides and fertilizer
Mowing and basic yard work don't require a state license in Indiana. Applying pesticides for hire does: the Office of Indiana State Chemist (OISC) licenses businesses and certifies applicators, and turf work falls under its Category 3b, Turf Management. Since July 1, 2024, people who apply fertilizer for hire on turf also need that Category 3b certification, and the business needs a license and liability insurance. If a program includes weed control or fertilizer, ask for the company's OISC business license and who on the crew is certified.
What to ask before signing up
- How many visits a year, and what happens at each one?
- Is the fertilizer schedule weighted toward fall?
- Do you adjust for bluegrass vs. tall fescue and for my soil test?
- How much notice do you give before applications, and when is it safe for kids and pets?
- Can I pause or cancel, and how is billing handled?
Ready for help? Request a lawn care company in Indianapolis or a nearby suburb and tell us your grass type if you know it.
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Frequently asked questions
What is the best grass for an Indianapolis lawn?
Purdue's turf specialists generally recommend Kentucky bluegrass or turf-type tall fescue. Bluegrass spreads and repairs itself; tall fescue is more drought tolerant and needs less fertilizer. They don't recommend perennial ryegrass as the main grass because it tends to struggle in July and August.
Does a lawn care company need a license in Indiana?
Mowing doesn't. Applying pesticides for hire requires an Office of Indiana State Chemist business license and certified applicators, and since July 2024 applying fertilizer for hire on turf also requires Category 3b certification.
When should I aerate my lawn in Indianapolis?
Fall is usually best for cool-season lawns because the grass recovers quickly in cool weather. It pairs well with overseeding in late August or September.
Sources and further reading
- Purdue University Turfgrass Science
- Purdue Extension, Indiana Accredited Horticulturist: Turfgrass Management
- Purdue Extension Marion County: Soil Testing Labs
- Office of Indiana State Chemist: pesticide and fertilizer applicator licensing
- Indiana DNR: Terrestrial Plant Rule (312 IAC 18-3-25)
- Citizens Energy Group: Backflow Prevention
- Citizens Energy Group: Water conservation tips
- Indiana American Water: wise water use
- National Weather Service Indianapolis: climate normals
- USDA Plant Hardiness Zone Map
- EPA WaterSense
- Indiana 811: call before you dig