Hormuz Sulfur Blockade Is Starving 2027's Harvest

The Strait of Hormuz blockade has trapped 45% of global sulfur exports, crippling fertilizer production worldwide. US corn acreage is projected to drop nearly 5 million acres. India has lost 800,000 tons of monthly urea output. And NOAA gives a 62% chance that El Niño emerges by summer. Three crises are converging on a single year's harvest — and the 2027 food supply is being decided right now, in the weeks before spring planting.

Oil gets the headlines. Sulfur gets ignored. But sulfur makes the fertilizer that grows the food that feeds 8 billion people — and nobody is negotiating safe passage for sulfur barges.

The five-link chain nobody's watching

Here's how a naval blockade in the Persian Gulf becomes empty shelves in 2027. Follow the links.

Link 1: Hormuz closes. The Strait of Hormuz carries roughly 21% of the world's oil. It also carries 45% of global sulfur exports and 35% of seaborne urea and phosphate trade. When the blockade choked oil shipments, it choked sulfur and fertilizer too. Link 2: Sulfur vanishes. Sulfur is a byproduct of refining crude oil. The Middle East's sulfur-rich crude made Gulf states the world's dominant sulfur exporters almost by accident. Saudi Arabia, the UAE, Kuwait, Qatar, and Iran together supplied 45% of global sulfur trade. That supply is now physically stuck behind a naval blockade. Link 3: Fertilizer production collapses. Sulfuric acid — made from sulfur — is the chemical that turns phosphate rock into fertilizer plants can absorb. No sulfur, no phosphate fertilizer. Morocco's OCP Group, the world's largest phosphate exporter, imports 3.7 million metric tons of Gulf sulfur annually. That pipeline is cut. China's fertilizer plants import roughly 4 million metric tons. Also cut. Beijing has restricted fertilizer exports to protect domestic farmers. India has lost 800,000 tons of its monthly 2.6 million-ton urea production because the government limited industrial gas supply to 70-75% of capacity. Link 4: Farmers plant less. With fertilizer prices at crisis levels, farmers are making hard choices right now. The USDA projects US corn acreage will drop to roughly 94 million acres in 2026 — down nearly 5 million from 98.8 million in 2025. Corn is nitrogen-hungry. When nitrogen costs 31% more than last year, farmers switch to soybeans. An estimated 10-15% of Northern US farmers haven't bought spring fertilizer supplies yet. If they can't source it in time, they'll plant crops that don't need much fertilizer — or leave fields fallow. Link 5: 2027 harvests shrink. Less fertilizer applied this spring means lower yields this autumn. Lower yields mean less grain entering storage for 2027. The food you'll eat eighteen months from now is being determined by fertilizer prices today.

The numbers on farmers' desks right now

Urea at the Port of New Orleans has spiked past $650 per ton — up over 20% in just two weeks. UAN28, a liquid nitrogen fertilizer used widely for corn, jumped 31% year-over-year to $489 per ton. DAP, the most common phosphate fertilizer, is up 11%. All eight major retail fertilizer categories tracked by DTN are higher than last year. Four are up by double digits.

In North Dakota, agronomists report that farmers who locked in fertilizer prices in December and January are relieved. Those who didn't are reconsidering every acre. "If they can't get fertilizer, they'll probably go to crops that don't use a lot of fertilizer, like sunflowers," one Grand Forks farmer told AgWeb.

The USDA's Prospective Plantings report — which reveals how many acres of what crops American farmers actually intend to plant — drops on March 31. It'll be the first hard data showing how deeply the Hormuz fertilizer crisis has reshaped American agriculture.

India's buffer runs out in May

India is the world's largest urea importer. The country secured about 1 million tonnes of urea through pre-war tenders, enough to last until roughly May 2026. After that, the math gets grim.

India's kharif (monsoon) planting season begins in June. It feeds the country's autumn harvest — rice, pulses, oilseeds — the crops that feed 1.4 billion people. The government has boosted natural gas supply to domestic urea plants by 23% and started diversifying import sources. But India still depends on the Gulf for two-thirds of its nitrogen fertilizer imports, and a disruption in liquefied natural gas supply to urea manufacturers "could impact production of the key soil nutrient ahead of the kharif planting season," the Times of India reported.

If the Hormuz blockade persists through April, India's buffer evaporates right as monsoon planting begins. The country that grows food for one-sixth of humanity would enter its most important growing season short of its most important input.

Brazil's September deadline

The connection runs the other way too. China needs Brazilian soybeans to feed its livestock. Brazil needs Gulf urea to grow those soybeans. Brazil's 2026/2027 crop cycle begins planting in September. Reuters reported that a prolonged conflict "could affect fertilizer deliveries ahead of Brazil's 2026/2027 crop cycle" — the one that determines whether the world's largest soybean exporter can meet demand.

China has already responded by restricting fertilizer exports, protecting domestic supply. That tightens global markets further. The circular dependency — Gulf sulfur feeds Chinese fertilizer plants, which feed Brazilian soy fields, which feed Chinese pigs — has no workaround.

Now add El Niño

As if the fertilizer chain weren't enough, NOAA's Climate Prediction Center declared an El Niño Watch on March 12. Their current forecast: a 62% chance El Niño emerges by June-August 2026, persisting through at least the end of the year. Some models suggest it could strengthen to moderate or strong intensity by the fall-winter period.

El Niño means droughts in Southeast Asia and Australia, floods in South America, erratic monsoons in India, and reduced crop yields across the tropics. The 2015-2016 El Niño alone caused an estimated $5.7 trillion in global economic losses.

Put the two threats together: farmers planting fewer nutrient-intensive crops because fertilizer is too expensive, and El Niño reducing yields on whatever they do plant. If both hit the 2026-2027 growing season, the compound effect on the 2027 harvest could be the worst in a generation.

The World Food Programme already warned that 45 million additional people could fall into acute hunger if the conflict doesn't end by mid-2026 and oil stays above $100. That projection didn't include El Niño.

The attention gap

Oil commands every headline. Sulfur commands none. The Albis Perception Gap Index scored the fertilizer-food chain at 5 — visible in US and European agricultural press, largely invisible to the 5 billion people most exposed to the consequences.

Indian media covers the kharif threat domestically. Brazilian outlets are tracking the September planting deadline. But the global connection — Hormuz to sulfur to fertilizer to farms to 2027 food prices — isn't being reported as one story anywhere except specialist agricultural outlets.

The regions that will feel this most acutely — Sub-Saharan Africa, where planting is already underway and the International Fertilizer Development Center has issued specific alerts, and South and Southeast Asia, where monsoon agriculture depends on imported inputs — have the least coverage of the supply chain that feeds them.

What happens in the next six weeks

Three deadlines are converging:

March 31: USDA's Prospective Plantings report reveals how many US corn and soybean acres farmers intend to plant. This is the first hard measurement of the fertilizer crisis's impact on the world's largest agricultural exporter. May 2026: India's pre-war urea buffer runs out. If Hormuz hasn't reopened and alternative supplies haven't materialized, India enters kharif season short of nitrogen fertilizer. June-August 2026: El Niño emergence window. If it arrives at moderate to strong intensity, it compounds every agricultural risk already in motion.

Every week the Hormuz blockade continues, sulfur stockpiles at fertilizer plants shrink. Morocco's OCP has finite reserves. China's plants are cutting operating rates. American farmers are locking in lower application rates. Indian officials are watching the calendar.

The war everyone's watching is about oil. The crisis nobody's watching is about a yellow powder that makes food grow. One ingredient. Forty-five percent of global trade. Zero safe passage. Three deadlines closing in.

The 2027 food supply is being written right now — in empty fertilizer tanks, in fields that won't be planted, and in a warming Pacific Ocean. Most of the world hasn't been told.