Diamond Muscat

Grape

Size

Small berries (~2 g)

Shape

White/green berries, high sugar, low acid

Flavor

Strong, pleasant muscat flavor - more intense than the related "Summer Muscat" variety

Texture

Seedless

Ripening window

Very early season (about a week before Summer Muscat)

Best uses

Bred specifically for raisin production; also used fresh and in commercial wine (notably in Australia)

Pollination

Self-pollinating - no pollinator needed

Tree size

Not specified by available sources

Notes

Your source data listed this as "White Diamond Muscat," but that exact name doesn't match any documented cultivar - it appears to conflate two real, unrelated grapes: "Diamond Muscat" (seedless, muscat-flavored, matches this record) and the older "White Diamond" (a seeded, non-muscat Concord x Iona cross from the 1880s, no relation). Given the muscat flavor and seedlessness described, this record is built around Diamond Muscat - worth double-checking your original source/plant tag if you want to confirm which one you actually have, since the two differ meaningfully (seeded vs. seedless being the big one). Diamond Muscat is Vitis vinifera (pure European) - bred by David Ramming and Ronald Tarailo at the USDA-ARS lab in Parlier, CA, released 2000. As a pure vinifera with no American-species resistance genetics, and per Texas A&M AgriLife's general guidance that vinifera varieties are broadly Pierce's Disease-susceptible, this is likely the highest PD-risk variety in this grape collection - not on the PD-tolerant list, and structurally the least suited of these six to Texas PD pressure.