Soil series profile
Wolfpen soil series
Wolfpen is a well drained soil with a loamy fine sand surface, mapped on 409,218 acres in 27 counties across 2 states. Hydrologic group B.
- Drainage class
- Well drained >99% of mapped acres
- Hydrologic group
- B 91% of mapped acres
- Typical topsoil pH
- 5.5 strongly acidic · range 5.5–5.5
- Mapped area
- 409k acres in 27 counties, 2 states
Typical Wolfpen profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–5 in (A) | Loamy fine sand | 5.5 | 8% | 83% | 1.25% |
| 5–28 in (E) | Loamy fine sand | 5.5 | 8% | 83% | 0.25% |
| 28–42 in (Bt) | Sandy clay loam | 5.5 | 24% | 58% | 0.2% |
| 42–65 in (Bt/E) | Sandy clay loam | 5.5 | 25% | 57% | 0.15% |
| 65–80 in (B't) | Sandy clay loam | 5.5 | 25% | 57% | 0.1% |
What this means
What Wolfpen soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Wolfpen soils is strongly acidic: pH 5.5. Most vegetables and lawn grasses do best around 6.0 to 7.0, so lime is often needed; blueberries, azaleas and rhododendrons like it as it is.
Sandy topsoil covers 88% of mapped Wolfpen acres. It drains fast and warms early in spring, but dries out and loses nutrients quickly: mulch, compost and steady watering help. The most common surface texture is loamy fine sand (79% of mapped Wolfpen acres).
>99% of mapped Wolfpen acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
Most land is in hydrologic groups B and C, where rain soaks in at a moderate pace.
For a septic system
For conventional septic absorption fields, NRCS rates 0% of the acres in mapped Wolfpen soils very limited, 88% somewhat limited and 0% not limited (12% not rated, such as urban land, pits or water).
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Wolfpen soil is found
Mapped acres
Wolfpen is mapped in Texas and Louisiana.
| County | Acres | Share of county land |
|---|---|---|
| Van Zandt County, TX | 65,195 | 12.0% |
| Smith County, TX | 64,324 | 10.9% |
| Henderson County, TX | 57,901 | 10.4% |
| Leon County, TX | 53,292 | 7.8% |
| Claiborne Parish, LA | 35,910 | 7.4% |
| Freestone County, TX | 34,124 | 6.1% |
| Hopkins County, TX | 28,406 | 5.7% |
| Harrison County, TX | 16,063 | 2.8% |
| Wood County, TX | 15,634 | 3.8% |
| Titus County, TX | 11,779 | 4.5% |
| Rains County, TX | 11,394 | 7.7% |
| Franklin County, TX | 6,653 | 3.6% |
| Rusk County, TX | 1,587 | 0.3% |
| Lamar County, TX | 1,404 | 0.2% |
| Morris County, TX | 1,182 | 0.7% |
| Houston County, TX | 1,069 | 0.1% |
| San Augustine County, TX | 828 | 0.2% |
| Sabine Parish, LA | 637 | 0.1% |
| Nacogdoches County, TX | 535 | 0.1% |
| Sabine County, TX | 443 | 0.1% |
| Anderson County, TX | 226 | 0.0% |
| Shelby County, TX | 160 | 0.0% |
| Angelina County, TX | 129 | 0.0% |
| De Soto Parish, LA | 116 | 0.0% |
| Delta County, TX | 100 | 0.1% |
| Panola County, TX | 93 | 0.0% |
| Camp County, TX | 36 | 0.0% |
Septic absorption fields
NRCS rating, share of Wolfpen acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 87.7% |
| Very limited | 0.0% |
| Not rated | 12.3% |
Drainage, water table and flooding
Share of Wolfpen acres
- Depth to seasonal high water table
- About 4.9 feet (59 in) (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 3–10% (median 3%).
- Topsoil organic matter
- Median 1.2%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 99.9% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
| Not rated | 0.1% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 0.0% |
| B: moderate infiltration | 90.9% |
| C: slow infiltration | 0.0% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 0.0% |
| Not rated | 9.1% |
Sources & data dates
- Source
- USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
- Data date
- SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
- Scope
- All map unit components named Wolfpen (component kind "Series") in SSURGO: 409,218 acres.
- Method
- Shares are by mapped acres of Wolfpen components. The profile comes from the single largest Wolfpen component. Full methodology.