Edna Valley
Sub-AVA · San Luis Obispo County · District 8
27 CFR 9.35 · established 1982-05-12 · last amended 1987-02-27
Heat class II · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
11 GridMET cells cover this region
season rain, Apr 1 – Oct 31
26 mm of it in the , Sep 1 – Oct 31
Warm and cool vintages since 1980
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Rain across the season, and at harvest
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The boundary
Hovering a shaded region names it; a click opens its page.
Measured vineyard area
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Drought categories, year by year
San Luis Obispo County — not Edna Valley
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What's in the ground
6.7
pH, 1:1 water
21.3cm
, whole profile
126cm
to
Well drained
, dominant condition
Distribution across 69 · mean ◆, median │, p10–p90 bar
Dominant
- 19.2%
- 14.1%
- 12.1%
- 10.4%
- 10.1%
69 map units · soil described over 96.8% of the region’s area · 2.3% is water, rock outcrop or other non-soil · 70% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Clay loam
38% sand · 31% silt · 31% clay
Sandier than 31% of California appellations and clayier than 91%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.
Plus 5% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.
Elevation, slope and aspect
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Producers
A curated roster, not a census — only source-verified entries appear, 2772 published across the atlas.
Bearing acreage by variety
San Luis Obispo County · District 8
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Price per ton
San Luis Obispo County · District 8
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The appellation in federal law
The boundary, in the government’s own words (235 words)
(c) Boundaries. The Edna Valley viticultural area is located in San Luis Obispo County, California. The beginning point is Cuesta Canyon County Park, located on U.S.G.S. map “San Luis Obispo Quadrangle” at the north end of Section 25, Township 30 South, Range 12 East. (1) From the beginning point, the boundary runs southwesterly along San Luis Obispo Creek to a point .7 mile southerly of the confluence with Davenport Creek; (2) Thence due east to the intersection with the 400-foot contour line of the northeastern flank of the San Luis Range; (3) Thence in a generally easterly and then a southeasterly direction along this 400-foot contour line of the northeastern flank of the San Luis Range, which forms the southwestern rim of Edna Valley, to the township line identified as “T31S/T32S” on the U.S.G.S. map; (4) Thence east along township line “T31S/T32S”, across Price Canyon to Tiber; (5) Thence in a generally easterly direction along the 400-foot contour line of Tiber Canyon and the southern rim of Canada Verde, crossing Corbit Canyon Road and continuing along the 400-foot contour line to longitude line 120°32′30″; (6) Thence north along longitude line 120°32′30″ to the 600-foot contour line of the southwestern flank of the Santa Lucia Mountain Range; (7) Thence in a generally northwesterly direction along the 600-foot contour line of the southwestern flank of the Santa Lucia Range to Cuesta Canyon County Park, the beginning point.