Zanzibar’s Clove Market Swung From Bust to Boom in a Single Year — Here’s What the Data Actually Shows

Anyone quoting a price for Zanzibar cloves off a single data point is quoting a moment, not a market. Over roughly twelve months, Bank of Tanzania trade data — reported through several separate releases — shows Zanzibar’s clove export earnings first collapsing, then rebounding sharply, in a pattern worth understanding on its own terms before treating any one figure as representative.

The collapse: year ending September 2025

Export value fell 76 percent to $6.3 million, down from $26.3 million in the prior comparable period, while volume dropped from 3,900 tonnes to 1,200 tonnes. The Zanzibar State Trading Corporation attributed the decline to two factors: global oversupply, as other clove-producing countries expanded output and eroded the price premium Zanzibar had historically commanded, and climate disruption to the crop’s traditional two-season flowering cycle, with officials describing rainfall as irregular and flowering timing as increasingly unpredictable. Seaweed exports fell in parallel over the same window (down 39.7 percent), contributing to an overall 35.5 percent drop in Zanzibar’s total goods exports for that period — evidence the shock wasn’t confined to cloves alone.

The rebound: February through June 2026

By the year ending February 2026, clove export value had reached $33.9 million on 5,500 tonnes at $6,157 per tonne — described in that report as a sixfold increase from the prior comparable period. By the year ending May 2026, value stood at $41.5 million on 6,400 tonnes, with the average unit price up 36.2 percent to $6,515.50 per tonne. The most recent window, year ending June 2026, put clove export receipts at $44.6 million on 7,000 tonnes — about 63 percent of Zanzibar’s total goods exports for that period — with the average price up 33.8 percent to $6,335.90 per tonne.

Reading a rolling series correctly

These figures come from a rolling twelve-month trade series, meaning each release compares against a different twelve-month base than the one before it, and the base periods for the 2025 collapse were themselves unusually depressed. That mechanical effect — a low base making the subsequent recovery look larger in percentage terms — is real, but it doesn’t fully explain the pattern: unit prices also rose in absolute terms across every release from February through June 2026, climbing from roughly $6,157 to $6,336 per tonne, consistent with a genuine firming of clove prices during that stretch rather than a pure base-effect illusion.

What this means for sourcing decisions

Two practical implications follow. First, a clove quote taken from Zanzibar in isolation is only meaningful alongside the reporting window it comes from — the same commodity was quoted at wildly different implied values within the same twelve-month span depending on which release you read. Second, the stated causes of the 2025 downturn — competition from other origin countries and unpredictable flowering cycles tied to weather — are structural rather than one-off, meaning the volatility this data captures is a feature of sourcing from Zanzibar specifically, not a passing anomaly. Buyers negotiating supply contracts should build in price-review clauses tied to a defined index period rather than a fixed historical benchmark.