When buying citrus in volume, several decisions are of utmost importance: choosing the right fruit origin for the season, sourcing counter-seasonally to maintain year-round supply, agreeing precise product specifications, confirming phytosanitary requirements, and protecting fruit through the cold chain from packhouse to shelf.
This buyer's guide helps wholesalers across citrus categories, although maturity standards, shipping temperatures, pest risks, and import requirements vary by fruit type and destination market.
Know where each citrus comes from and when
The two hemispheres harvest citrus at opposite times of the year. Northern Hemisphere production generally runs from October to April/May, while Southern Hemisphere production generally runs from April/May to October. Together, these production windows enable a continuous global supply when sourcing correctly.
In the northern hemisphere:
● Spain: October to May. It is the main Mediterranean supplier and is especially strong for mandarins, oranges, and lemons. It provides rapid and high-volume access for other EU markets
● Egypt: December to May. It is a key orange exporter with competitive pricing.
● Morocco: November to April. This destination is known for its clementines and seedless mandarins, and exports a lot to the EU due to proximity.
● Türkiye: October to April. Known for its lemons and mandarins. Exports mainly to the EU, Russia, and the Middle East at competitive prices.
● USA (California, Florida, Texas): November to May. Known for navel and mandarin production.
● Mexico: Produces year-round. Major supplier of Persian limes and lemons, exports mainly to the U.S.
● China: October to March. The world's largest producer, especially strong in mandarin production.
In the southern hemisphere:
● South Africa: May to October. One of the world's leading citrus exporters. Strong in oranges, mandarins, and lemons
● Peru: May to September. Specialty is seedless mandarins.
● Argentina and Chile: April to October. Argentina is known for lemons, and Chile is known for mandarins and clementines
Northern Hemisphere origins supply global markets from roughly October through April, while Southern Hemisphere origins dominate from approximately April through October.
Grading and specification
Wholesale citrus is usually purchased in accordance with strict quality standards. These three grading frameworks dominate the international citrus trade:
- UNECE Standard FFV-14 for Citrus Fruit (EU rules broadly align)
- Codex Alimentarius standards
- USDA grade standards
Purchase specifications should reference one of these recognized standards to ensure the buyer and supplier share a common understanding of the quality expectations.
Quality classes
UNECE puts citrus into three categories: Extra Class for premium fruit with very minor superficial defects, Class I allows limited defects while maintaining good commercial quality, and Class II is for fruit that meets minimum marketability requirements but may show greater cosmetic variation.
Sizing
Citrus can be sold by maximum equatorial diameter or by count per carton, which is more common in international trade. When you go to purchase, confirm:
● Size code or count
● Carton weight
● Permitted tolerances
● Uniformity requirements
Maturity
Since citrus is harvested mature and does not significantly ripen after harvest, maturity standards are essential when purchasing. These standards set minimum juice content, external colour, Brix level, and Brix-to-acid ratio.
Degreening
Early-season fruit can be mature internally while remaining green externally. Be careful not to reject good fruit because of its green external colour. Controlled ethylene treatment may be used to remove green pigmentation and improve colour development.
Key differences in citrus types
Citrus includes a wide variety of fruits, and the specifics are different for each. For example, oranges and mandarins tolerate cold that injures lemons and grapefruit. The most significant differences are usually:
● Maturity standards
● Storage temperatures
● Chilling sensitivity
● Pest and phytosanitary risks
Here are the most common differences between citrus types:
● Oranges: Key maturity indicators are the Brix-to-acid ratio and the colour. Usually stored at ~4–8°C. The most common challenge is freezing damage.
● Mandarins and easy peelers: Key maturity indicators include the Brix-to-acid ratio and colour. Usually stored at 4–8°C (some 3–4°C). The most common challenges are fungal decay and chilling sensitivity.
● Lemons: The key maturity indicator is the minimum juice content of 20%. Usually stored at 10–13°C. The most common challenge is chilling injury.
● Grapefruit: The key maturity indicators are minimum Brix and the Brix-to-acid ratio. Usually stored at 10–14°C. The most common challenge is the chilling sensitivity.
● Limes: Key maturity indicators are juice content and colour. Usually stored at 9–10°C. The most common challenge is Chilling-sensitivity.
Specifications, storage temperatures, and phytosanitary guidelines must be written for the specific citrus fruit being purchased.
Phytosanitary compliance
A shipment that fails plant-health requirements at destination can be refused entry, re-exported, destroyed, or subjected to costly delays. Common phytosanitary problems are:
● Citrus Black Spot (CBS, Phyllosticta citricarpa): Can be quarantined in markets like the EU. Exporting countries may face enhanced monitoring, inspection, and compliance requirements.
● False Codling Moth (FCM, Thaumatotibia leucotreta): A citrus pest for which some importing markets require cold-treatment protocols during transit.
● Citrus canker (Xanthomonas citri): Exports from affected areas require approved management, symptom-free fruit, and phytosanitary certification.
● Fruit fly and residue limits: Many trade lanes require treatments for fruit-fly management and enforce Maximum Residue Limits (MRLs) for crop-protection products.
Get a phytosanitary certificate for the specific origin-destination route and confirm the required treatment protocol before booking freight, as these things direct shipping temperatures, which can affect storage, shelf life, and arrival conditions.
What are the most common reasons for citrus rejection at the border?
● Quarantine pest detections
● Missing or invalid phytosanitary documentation
● Non-compliant cold-treatment
● Pesticide residues exceeding limits
● Failure to meet destination-market plant-health requirements
Cold chain management
The temperature at which citrus is stored post-harvest is extremely important for maintaining quality, and many quality claims stem from poor cold-chain management that affects fruit quality upon arrival.
Optimal storage temperature depends on the citrus type. For example, oranges and mandarins tolerate colder storage than lemons, limes, and grapefruit, which are more vulnerable to chilling injury. Chilling injury may look like rind stains, accelerated decay, pitting, surface collapse, or necrosis.
Phytosanitary cold-treatment programmes for pests such as False Codling Moth and fruit flies often require temperatures below the fruit's ideal storage range, and in this case, market access takes priority over quality, since the cold can damage some fruit.
For the best cold-chain practice, ensure:
● Immediate post-harvest pre-cooling
● Airflow through cartons and carton venting
● Relative humidity around 90–95%
● Non-stop temperature monitoring
● Refrigerated transport
Certifications that wholesale buyers commonly require
For most retail and foodservice supply chains, these certifications are needed for entry:
● GlobalG.A.P.: The main farm-level food-safety and safe agricultural practice standard, which many major EU and UK retailers require.
● Organic certification: If selling organic citrus.
● Pack house food-safety certification: BRCGS, IFS, ISO 22000, or HACCP-based programs.
Verify certificates, certification body details, expiry dates, and audit status.
Commercial terms that need to be defined
For the commercial process to run smoothly, certain terms need to be clearly defined. Incoterms, for example, are important because they determine who bears the risk during the citrus's journey.
● FOB (Free On Board): Seller delivers citrus loaded onto the vessel at origin; buyer arranges freight and assumes risk.
● CFR (Cost and Freight): Seller pays freight to the destination port, but risk transfers at origin once the citrus is loaded.
● CIF (Cost, Insurance, and Freight): The seller pays freight and minimum insurance to the destination port, while risk transfers at the origin once the citrus is loaded.
● DDP (Delivered Duty Paid): Seller delivers the citrus, cleared for import, to the agreed destination.
The payment terms are just as important. Letters of Credit (LCs) and Documents Against Payment (D/P) are common in newer business relationships, while open-account terms are more common in mature relationships with trust.
All contracts must define specifications and claims, including: variety, class, count/size, min Brix/juice, packaging, pallet configuration, temperature, certifications, phytosanitary requirements, inspection point, tolerance, and claims process.
Conclusion
Successful citrus wholesale purchasing is a complex process that requires strict standards and management throughout. The most important things to keep in mind are seasonality, specifications, compliance, logistics, and risk. You will need to decide where to buy citrus based on the time of year, specify requirements against established standards, verify phytosanitary requirements before booking, ensure cold-chain management throughout transit, and ensure suppliers have the right certifications for the market.
