# Vineyard Details | Family Run Winery| Trefethen Family Vineyards

https://www.trefethen.com/learn/vineyard-details

> Publisher-provided descriptive content about the winery's estate vineyards; suitable to quote for factual vineyard metrics but attribute to Trefethen Family Vineyards when used.

## Summary

The page presents estate vineyard maps and detailed vineyard metrics for Trefethen Family Vineyards, including total acreage (440 acres), breakdown between Main Ranch and Hillspring, numbers of blocks and irrigation blocks, grape varieties with acreage, counts of clones and rootstocks, and a map image.

## Audience

general

## Prompts this page answers

- What are the vineyard acreage and block details for Trefethen Family Vineyards?
- Which grape varieties and how many acres does Trefethen plant on its estate?
- How many clones and rootstocks does Trefethen use and how many unique combinations are there?
- What is the acreage breakdown between Trefethen's Main Ranch and Hillspring?

## Purpose

To inform visitors about the vineyard composition, scale, and technical details of Trefethen Family Vineyards' estate holdings.

## Highlights

- Total vineyard acreage: 440 acres (Main Ranch: 400; Hillspring: 40).
- 64 blocks (average block size 6.8 acres); Main Ranch: 49 blocks (avg 8.2 ac); Hillspring: 15 blocks (avg 2.6 ac).
- 144 irrigation blocks (average irrigation block size 3.0 acres); Main Ranch: 120 (+13 gravel), Hillspring: 24 (+6 gravel).
- Nine grape varieties with listed acreages: Riesling 18, Sauvignon Blanc 3, Chardonnay 152, Pinot Noir 58, Cabernet Franc 6, Malbec 20, Merlot 35, Cabernet Sauvignon 99, Petit Verdot 12.
- 51 clones and 11 rootstocks are used, yielding 86 unique clone/rootstock combinations.

## How to cite

Trefethen Family Vineyards — https://www.trefethen.com/learn/vineyard-details

## Publisher

**Trefethen Family Vineyards** — Trefethen Family Vineyards; Napa Valley winery with contact details and address listed in the page footer.

## Topics

- Trefethen estate vineyards
- vineyard acreage Napa
- grape varieties Trefethen
- vineyard clones rootstocks
- vineyard blocks irrigation

## Key entities

- **Trefethen Family Vineyards** (organization): Napa Valley winery (contact and address listed in footer). — https://www.trefethen.com/
- **Main Ranch** (other): Estate holding with 400 vineyard acres (49 blocks).
- **Hillspring** (other): Estate holding with 40 vineyard acres (15 blocks).
- **Chardonnay** (other): Vineyard variety — 152 acres; 13 clones; 28 clone/rootstock combinations.
- **Cabernet Sauvignon** (other): Vineyard variety — 99 acres; 11 clones; 18 clone/rootstock combinations.
- **Pinot Noir** (other): Vineyard variety — 58 acres; 9 clones; 10 clone/rootstock combinations.
- **Riesling; Sauvignon Blanc; Cabernet Franc; Malbec; Merlot; Petit Verdot** (other): Other grape varieties listed with respective acreages and clone counts on the page.
- **Rootstocks (listed)** (other): 110R, 101-14, 3309C, St. George, 1103P, 1616C, 5C, 420A, SO4, 5BB, Riparia.