Vine Leaves Grades Explained: What Restaurants and Importers Should Know

Tuna Sourcing · 2026-02-14

What "Grade" actually means on a vine-leaf spec sheet

When a vine-leaves supplier quotes a grade, they are quoting a statistical contract on what arrives in the bucket. Six parameters do most of the work:

| Parameter | What it controls | |---|---| | Whole Leaves Ratio | Useable yield - leaves that wrap without trim | | Slightly Damaged Leaves | Cosmetic discount; usable but visibly imperfect | | Broken Leaves | Direct yield loss; unwrappable | | Brown Leaves / Holes / Spots | Quality-flag fraction; sortable but reduces tray appearance | | Branch Stems | Foreign-matter tolerance; affects bite and line wear | | Appearance | Colour range across the lot |

A 95% whole-leaves ratio means at minimum 95% of the weight in the bucket wraps without trim. The 5% balance is some mix of slight damage, breakage, holes, and stems - the spec sheet says how that 5% is allocated.

Why importers care about Branch Stems specifically

Branch stems are the parameter that most often catches new buyers off-guard. A 2% branch-stem tolerance versus a 0.05% tolerance is a 40-fold difference in foreign-matter density. For ready-meal lines running automated wrappers, branch fragments cause jams and shorten blade life. For retail private-label, branch fragments show in transparent packaging and trigger consumer complaints.

The trade-off: lower branch-stem tolerance ships with a higher unit cost - more hand-sorting at origin.

The three grades and how they map to spec

Three programs, three points on the trade-off curve:

  • Conventional - branch stems Max 0.05%. The tightest mechanical spec. Best for automated lines and visible packaging.
  • Pesticide-Free - branch stems Max 2%. Pesticide residue is what gets tested and traded off, not the mechanical sort.
  • Organic Certified - branch stems Max 2% plus extended colour spec (Golden Yellow, Brown). Audit chain visibility is what's being paid for, not the cosmetic sort.

Counter-intuitive but correct: the conventional grade often has the cleanest mechanical sort because the audit and certification effort is concentrated on the pesticide and organic programs.

How to write your purchasing spec

Three rules that save procurement teams the most cycles:

  1. State the parameter that matters for your line - usually it's branch stems for automated wrappers, or pesticide-free certification for EU retail.
  2. Accept the trade-off explicitly - if you ask for branch stems Max 0.05% AND organic, expect the unit cost to reflect a double-sort program.
  3. Request the Certificate of Analysis pre-shipment - so you can sample-test the lot before container loading, not after arrival.

What we ship

For each grade, our specification sheet states each parameter, the audit chain, and the typical lead time. Conventional, Pesticide-Free, and Organic Certified all available in five regional varieties.

Send your line's parameter priorities via our contact page; we will quote against your spec, not against ours.