Illustrated Post Oak Savannah with open grassland, scattered oaks and a doe with her fawn.

Post Oak Savannah Ecoregion

Grimes County Wildlife Exemption

How to get - and keep - a 1-d-1 wildlife management valuation on Grimes County land: deadlines, the appraisal district, and the practices that fit this part of Texas.

Ecoregion
Post Oak Savannah
County seat & CAD
Anderson, Texas
Application window
January 1 – April 30
Core requirement
Form 50‑129 + PWD‑885 · 3 of 7 qualifying practices annually

The wildlife exemption in Grimes County

The wildlife exemption lets Grimes County landowners hold on to their 1-d-1 agricultural valuation - and its tax savings - by managing land for native species like white-tailed deer and bobwhite quail. Because the county sits in the Post Oak Savannah, TPWD's regional standards for that ecoregion set the bar your plan is judged against.

The Post Oak Savannah rolls between the Blackland Prairies and the Pineywoods - a mosaic of post oak and blackjack oak woodlands, improved pastures, and sandy-loam soils. Much of this region was converted to bermudagrass pasture, so wildlife management here often centers on restoring native plant communities and managing the yaupon understory that shades out forage.

The Post Oak Savannah carries strong and growing deer populations, and its patchwork of woods and pasture makes it one of the most practical regions in Texas to run a credible wildlife management program on 20–100 acres. Typical target species for Grimes County plans include white-tailed deer, Rio Grande turkey, bobwhite quail, mourning dove, and grassland songbirds. The recurring habitat challenges - yaupon and eastern redcedar encroachment, bermudagrass monocultures with little wildlife value, and habitat fragmentation from subdivision - are what a good management plan turns into qualifying work.

On the ground in Grimes County

Anderson is the county seat, while Navasota and Plantersville anchor much of the better-known rural landscape. Between the Brazos and Navasota systems, Grimes County is rolling Post Oak country of sandy soils, oak mottes, pasture, ponds and brushy creek bottoms. Wildlife management can restore native grass, keep enough understory for travel and shelter, protect riparian strips and improve water. A Grimes County plan works best when it shows how open pasture and woody cover are being arranged into usable edge habitat rather than describing the property as one undifferentiated ranch.

Grimes County lies in the Post Oak Savannah and is assigned to TPWD's Post Oak Savannah wildlife-use appraisal region - the legal map that sets the reduced-tract acreage rule below.

Is there an acreage minimum in Grimes County?

Did the tract get smaller since January 1 of last year?

No ➔

There is no wildlife acreage test in Grimes County at all. Whatever the size, file Comptroller Form 50‑129 with a PWD‑885 plan. A 7-acre tract that already carried 1‑d‑1 (ag exempt) and was never split can convert with no penalties.

Yes ➔

The Grimes County appraisal district has published its figure. The legal minimum land requirement is 12.5 acres. Wildlife management property associations, and land designated as habitat for a special listed species: 10 acres.

Source: Grimes Central Appraisal District - 2026 Eligibility Requirements for Wildlife Management.

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See how Grimes County compares: minimum acreage for all 254 Texas counties →

How it works here

Grimes County follows the statewide 1-d-1 framework (Texas Tax Code §23.51(7)); the local variables are your appraisal district's filing habits and the Post Oak Savannah intensity standards:

  • Start from an existing ag or timber valuation. Wildlife management is a conversion of qualified open-space land - check eligibility if your status is unclear.
  • File a wildlife management plan (TPWD form PWD‑885) with the Grimes County appraisal district, attached to Comptroller Form 50‑129, between January 1 and April 30. What goes in the plan →
  • Perform at least 3 of the 7 practices each year at Post Oak Savannah intensity levels - see the local examples below.
  • Document everything - dates, photos, quantities. When the chief appraiser requests an annual report (PWD‑888), you'll answer with records, not recollections.
  • No minimum acreage applies unless your tract got smaller since January 1 of last year. If it did, Grimes County's figure is covered above - the district picks one number for the whole county, and the plan is still the application either way.

The 7 practices, Post Oak Savannah-style

These are the kinds of activities appraisal districts in the Post Oak Savannah recognize as real management - your plan picks at least three. The Post Oak Savannah region guide covers the species, habitat problems and intensity standards behind them.

1

Habitat control

Mechanical yaupon and cedar control, converting bermudagrass paddocks back to native bunchgrasses, and prescribed burns to maintain the savannah structure.

2

Erosion control

Gully shaping and re-seeding on sandy soils, filter strips of native grass along drainages, and pond-dam repair with erosion-control seeding.

3

Predator control

Feral hog trapping, coyote and bobcat management balanced for deer fawn survival, and fire ant control around quail nesting areas.

4

Supplemental water

Adding wildlife ramps and shallow edges to stock tanks, building small wetland cells below pond spillways, and installing guzzlers in pasture corners.

5

Supplemental food

Cool-season food plots of oats, wheat and clover, strip-disking to encourage native forbs like croton and ragweed, and protecting oak mottes for acorn production.

6

Providing shelter

Half-cutting cedars for instant quail covey headquarters, leaving brush piles after clearing, and maintaining native grass nesting cover at least 12 inches tall.

7

Census counts

Spotlight deer counts on ranch roads, fall covey call counts for quail, trail camera surveys, and dove cooing counts.

Filing & the appraisal district

DateWhat happens in Grimes County
January 1Valuation date - land is judged on its use and qualification as of this day.
Jan 1 – Apr 30File Form 50‑129 with your PWD‑885 plan at the Grimes County appraisal district (Anderson).
After Apr 30Late applications accepted until the appraisal roll certifies, with a 10% penalty on that year's savings.
On requestThe chief appraiser may require a PWD‑888 annual report - many districts ask annually. Keep logs so the answer is one click away.

The Grimes County appraisal district is headquartered in Anderson. For current mailing addresses, phone numbers, and any locally adopted wildlife-use ratio, use the Texas Comptroller's county directory - and confirm details before filing; districts occasionally adjust procedures year to year.

The cost of letting it slip

Losing qualification means market-value taxes going forward - and if the land's use changes to non-agricultural, rollback taxes: the previous three years of tax savings, recaptured in one bill. On typical Grimes County acreage that's easily five figures. How rollback works →

Grimes County questions

Grimes County wildlife exemption FAQ

The questions Grimes County landowners ask most - answered against this county’s appraisal district and the Post Oak Savannah standards its plans are judged by.

How many acres do you need for a wildlife exemption in Grimes County?
For most tracts, there is no minimum at all. Grimes County applies no acreage test to wildlife management use unless your tract was reduced in size since January 1 of the preceding year. If it was, the Grimes County appraisal district applies the figure it has adopted: 12.5 acres. The district sets 10 acres for land in a wildlife management property association. A tract that was never split can convert at any size, so long as it already carries a 1‑d‑1 (ag exempt) valuation. Source: Grimes Central Appraisal District - 2026 Eligibility Requirements for Wildlife Management.
What is the wildlife exemption filing deadline in Grimes County?
April 30. The window opens January 1 and closes April 30 - file Comptroller Form 50‑129 with a TPWD PWD‑885 wildlife management plan attached at the Grimes County appraisal district in Anderson. Miss it and the district still accepts a late application until the appraisal roll certifies (typically mid-July), but with a 10% penalty on that year’s tax savings. One trap catches new owners every year: buying land that already holds the valuation does not carry it over to you - you have to file your own application.
Do I need an existing ag exemption to get a wildlife exemption in Grimes County?
Yes. Wildlife management is a qualifying use within the 1-d-1 open-space valuation, not a separate exemption - so the land has to already carry an agricultural or timber productivity valuation on the day you convert. If it does, converting changes the qualifying activity and nothing else: the productivity value carries over from your previous ag category, so your tax bill does not move. If the land lost its valuation, you would requalify the ordinary way first - agricultural use for 5 of the preceding 7 years - and then convert. The conversion playbook →
Which wildlife management practices qualify in Grimes County?
Any three of the seven named in Texas Tax Code §23.51(7): habitat control, erosion control, predator control, supplemental water, supplemental food, providing shelter, and census counts. The list is statewide, but the standard you are judged against is regional - Grimes County is Post Oak Savannah country, so the Grimes County appraisal district expects work sized to Post Oak Savannah intensity levels and aimed at the problems that actually limit wildlife here: yaupon and eastern redcedar encroachment, bermudagrass monocultures with little wildlife value, and habitat fragmentation from subdivision. Habitat control, supplemental water, and census counts are the most common opening three. See what each one looks like here →
What species should a Grimes County wildlife management plan target?
Whatever you name, it has to be indigenous - Texas Tax Code §23.51(7) qualifies land used to sustain a breeding, migrating, or wintering population of native wild animals, and that is the species test that actually decides qualification. In the Post Oak Savannah, plans are usually built around white-tailed deer, Rio Grande turkey, bobwhite quail, mourning dove, and grassland songbirds. The Post Oak Savannah carries strong and growing deer populations, and its patchwork of woods and pasture makes it one of the most practical regions in Texas to run a credible wildlife management program on 20–100 acres. Introduced species are the common trap: exotics like axis deer or blackbuck may live on the property, but managing for them (alone) earns you nothing toward your three practices - so confirm every species you name in the plan is native to Texas before you file.
Does Grimes County require a PWD-888 annual report every year?
The chief appraiser may require one whenever they ask - that is the statutory standard, and many Texas districts ask annually or on a review cycle. The practical answer is to assume it is coming: keep dated records, photos, and quantities for every practice as you go, and the report is a formality instead of a scramble. Landowners rarely lose a valuation because the work was not done; they lose it because the work could not be proven. What a strong PWD‑888 looks like →
Will switching from cattle to wildlife trigger rollback taxes in Grimes County?
No. Rollback under Texas Tax Code §23.55 is triggered by a change to a non-agricultural use - developing, paving, or subdividing the land. Moving from grazing to wildlife management is a change of use within 1-d-1, so the valuation continues uninterrupted and no recapture is owed. What does carry risk is letting the land go idle: land quietly used for nothing agricultural can be treated as having changed use. A documented wildlife plan is precisely how you stay out of that gray zone. How rollback works →
Who approves the wildlife exemption in Grimes County - TPWD or the appraisal district?
The appraisal district. The Grimes County appraisal district’s chief appraiser reviews your Form 50‑129 and PWD‑885 plan and decides whether the land qualifies, the same as for any agricultural application. Texas Parks & Wildlife publishes the forms and the ecoregion guidelines your plan should match, but it does not approve individual properties and has no vote on your valuation. The district is headquartered in Anderson; current contact details are in the Texas Comptroller’s county directory.

Looking for the statewide picture? The full Texas wildlife exemption FAQ covers eligibility, plans, practices, reports, and rollback in depth.

The Post Oak Savannah counties closest to Grimes County - same ecoregion, same intensity standards, and largely the same ground:

Brazos CountyMadison CountyWashington CountyWaller CountyBurleson CountyRobertson County All 254 counties
Rio Grande wild turkey and northern bobwhite quail among native Texas grasses and limestone

Protect your Grimes County valuation.

Bring your previous report and field records. Keep this year’s practices, county feedback, and next PWD‑888 together.

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