Tiller Lawn Guides

Bermudagrass Lawn Care Guide for Arkansas

Bermudagrass in Arkansas's zone 7b runs on a warm-season clock — it wakes up as soil warms in spring, does its heaviest growing through summer heat, and shuts down for dormancy once fall arrives. The guidance below follows that clock: how much nitrogen to budget across the season, how low to mow, when the key windows for pre-emergent, seeding, and fertilizing typically fall, and how to avoid stacking treatments that interfere with each other.

Bermudagrass Arkansas USDA zone 7b

Nitrogen Budget

Plan on a total nitrogen budget of roughly 1 to 5 pounds per 1,000 square feet across the growing season, split across multiple feedings rather than dumped in all at once. That range carries medium confidence, so treat it as a solid starting point to adjust from rather than a hard rule.

Pushing much beyond that — toward about 6.5 pounds per 1,000 square feet — moves into a caution zone worth avoiding. Heavy nitrogen loads on warm-season turf tend to push top growth faster than the roots can support, which shows up as thatch and weaker recovery later.

Mowing Height by Season

Bermudagrass holds steady in the same band all year: about ¾ inch to 1½ inches, with a target of around 1¼ inches through spring, summer, and fall alike. Unlike cool-season grasses, there is no seasonal step-up or step-down — the goal is consistent, low mowing that keeps the canopy dense.

Whichever height you're at, never remove more than one-third of the blade in a single mow. If the lawn has gotten away from you, step the height down gradually over two or three cuts instead of scalping it back in one pass. The one exception is a single spring green-up reset: cutting down to about ¾ inch once, early in spring, clears out the previous year's dormant thatch and speeds up green-up. Bag those clippings, then return to your normal mowing height — it's a once-a-year move, not a routine practice.

The Seasonal Schedule

Spring opens with a pre-emergent herbicide window from Mar 1 to Mar 29, timed to soil rising through about 55°F, aimed at stopping summer annual weeds before the lawn fills in. Spring green-up fertilizer follows from Apr 6 to May 4, once soil holds consistently above 65°F and the lawn shows roughly half green-up. Core aeration has its window from Apr 24 to Jun 5, once the lawn is actively growing with soil above 65°F and 75 percent or more green.

Summer carries the bulk of the work. Broadleaf weed control runs May 1 to Jun 18 on actively growing weeds once the lawn has fully greened up — confirm the label lists Bermudagrass, and avoid applying above roughly 90°F or when the lawn is under drought stress. Early-summer seeding falls May 4 to Jun 29, once soil is reliably in the 65–70°F range and nights stay warm; that timing gives a full growing season to establish before dormancy, and Bermudagrass should never be seeded in fall. A grub preventive window sits May 11 to Jun 22 for lawns with a known grub history or local pressure — most lawns can skip it and simply scout for damage instead. A wetting agent window runs May 16 to Jul 15 to help water soak in rather than bead off during peak heat. Two fertilizer windows bookend summer: Jun 15-centered (May 25 to Jul 6) and Aug 5-centered (Jul 15 to Aug 26), the latter being the last heavy nitrogen feeding before the fall transition.

Fall shifts toward preparation and cleanup. An annual soil test window runs Jul 27 to Oct 25, best collected while the grass is still active so results guide any lime or nutrient adjustments. A fall potassium application, low in nitrogen and high in potassium, falls Sep 15 to Oct 27 to support cold hardiness ahead of dormancy. A fall pre-emergent for winter weeds — annual bluegrass, henbit, chickweed — runs Aug 28 to Oct 3, timed to soil cooling through about 70°F.

Watering

Aim for about ¾ inch of water a week, split into two deep soakings of about ½ inch each, watered early in the morning so the lawn dries out before nightfall — wet turf overnight invites disease. Deep, infrequent watering encourages roots to grow down rather than staying shallow.

In sustained heat, that weekly target climbs: roughly a quarter inch more when highs sit near the mid-80s, and up to about half an inch more when three or more days push near 90°F. Keep any increase capped so the soil can actually absorb it rather than letting it run off.

Timing Conflicts to Watch

A few product categories interact with seeding in ways that matter for timing, not for whether either is 'safe' — always confirm the specific label. If you've recently applied a broadleaf herbicide, wait about 6 weeks (42 days) before seeding. If you've recently applied a crabgrass pre-emergent, wait about 12 weeks (84 days) before seeding — that product is designed to stop germination, and it doesn't distinguish between crabgrass seed and grass seed.

The fall pre-emergent for winter weeds carries a related note: it also blocks grass seed, including any winter ryegrass overseed. Treat it as one or the other for a given area in that window — a fall pre-emergent application or an overseed, not both.

Season at a glance

Here is how the season generally lays out for Bermudagrass in Arkansas, window by window.

Mar 1 to Mar 29 Pre-Emergent Herbicide
Apr 6 to May 4 Spring Green-Up Fertilizer
Apr 24 to Jun 5 Spring Core Aeration
May 1 to Jun 18 Broadleaf Weed Control
May 4 to Jun 29 Early-Summer Seeding
May 11 to Jun 22 Early-Summer Grub Preventive Window
May 16 to Jul 15 Summer Wetting Agent
May 25 to Jul 6 Summer Fertilizer - June
Jul 15 to Aug 26 Summer Fertilizer - August
Jul 27 to Oct 25 Annual Soil Test
Aug 28 to Oct 3 Fall Pre-Emergent - Winter Weeds
Sep 15 to Oct 27 Fall Potassium Application

None of this replaces what's printed on the product label in front of you — it's the frame for reading it well. Match the window, match the soil temperature where one's given, and let Arkansas's own spring warm-up and fall cooldown set the pace rather than the calendar alone.

These windows move every year.

The dates on this page are one season's estimate. Tiller watches your soil temperature and tells you when each window actually opens — and what to do while it's open.

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