South Florida moves an enormous amount of imported fresh produce — blueberries, grapes, citrus, stone fruit — and a large share of it arrives under cold treatment. For the importer, cold treatment is a phytosanitary requirement. For the drayage carrier, it is a scheduling problem with expensive failure modes.

If you import treated produce through PortMiami or Port Everglades, understanding how the treatment cycle interacts with the trucking plan is the difference between a smooth delivery and a rejected load.

What cold treatment is

Cold treatment is a pest-mitigation protocol: the cargo is held at a specified low temperature for a specified number of consecutive days to kill fruit fly larvae and other quarantine pests. USDA APHIS sets the temperature and duration by commodity and origin. Probes inside the container record the pulp temperature continuously, and the recorded data is what proves compliance.

There are two ways it happens, and they produce very different drayage plans.

In-transit cold treatment

The treatment runs during the ocean voyage. The container arrives with the cycle complete or nearly complete. USDA reviews the temperature data, and if the readings satisfy the protocol, the container is released. Drayage can proceed on a normal import timeline.

The risk is a failed treatment. If a probe drifts out of range for long enough, the cycle is broken. The cargo then either needs to be re-treated at an approved facility or is refused entry. A truck dispatched on the assumption of a clean release becomes a dry run.

Dockside or post-arrival treatment

The container arrives untreated or partially treated and completes the cycle plugged in at an approved facility. This adds days on the ground before the box can move to the consignee. Those days sit squarely inside the demurrage and per diem clocks, which is where the cost usually lands.

Why the drayage timing is hard

Three clocks run at once and they are not synchronized:

• The treatment clock, which ends when USDA accepts the probe data
• The terminal free time clock, which started when the container was discharged
• The carrier per diem clock, which starts when the container leaves the terminal

Release is rarely predictable to the hour. USDA review can clear in the morning or late in the day. Terminal appointment slots are booked in advance. A container that releases at 3 p.m. with no appointment available until the following afternoon accrues another day of demurrage for a reason nobody controlled.

If you are not already tracking these separately, our breakdown of last free day in drayage is worth reading alongside this, because treated produce is the cargo type where those distinctions cost the most money.

Practical planning steps

1. Get the probe data early

Ask the ocean carrier for the temperature download as soon as it is available — ideally before vessel arrival. If the treatment failed, you want to know before you have booked trucking, not after.

2. Pre-book appointments against a realistic release

Do not book the first available slot after estimated release. Book the slot you can actually hit if USDA clears late. A carrier with flexible dispatch and local equipment can often re-book same-day; a carrier running from outside the market usually cannot.

3. Plan genset and plug capacity

A reefer in motion needs power. A reefer waiting needs a plug. If the container will sit — at a yard, at a consignee with no dock availability, or pending a re-treatment decision — confirm plugged storage in advance. This is the single most common gap in produce drayage plans. Our reefer container drayage in Miami page covers the equipment side in more detail.

4. Decide the fallback before you need it

If USDA rejects the treatment, your options are re-treatment, export, or destruction. Each has a different trucking implication and a different deadline. Having the decision path agreed with your broker in advance turns a crisis into a dispatch instruction.

Where the money goes

On a clean in-transit treatment move, drayage costs look like any other reefer pull. On a complicated one, the additions stack up quickly:

• Demurrage for days spent waiting on USDA review
• Per diem if the container is pulled and then held pending a decision
• Genset rental and fuel for the powered portion of the move
• Plugged yard storage
• Dry run charges when a release does not materialize
• Re-delivery if the consignee cannot receive within the window

Most of these are avoidable with information rather than money. The importers who control produce drayage cost well are the ones whose carrier, broker, and receiver are all looking at the same release status in real time.

Consignee-side realities

Produce receivers in Medley, Hialeah, and the Doral corridor generally run tight dock schedules and will not hold a door for a late container. A refused delivery on treated produce is not a rescheduling inconvenience — it is a shelf-life problem. Build the delivery appointment around the realistic release time, and if the release slips, move the appointment rather than the truck.

For loads that will need staging between terminal and consignee, plugged capacity at a secure local yard is the safety valve. See our Miami yard storage options for how that works in practice.

Getting it right

Cold treatment drayage rewards preparation and punishes assumptions. Know the treatment type before the vessel berths, have the probe data reviewed early, keep an appointment strategy that survives a late release, and make sure the container has power wherever it stops. Request a quote and we will build the plan around your specific commodity and treatment protocol.

Frequently asked questions

Can a container be drayed before USDA releases the cold treatment?

No. The container cannot leave the terminal for delivery until the treatment is accepted and the hold is lifted. In some cases a container may be moved to an approved treatment facility under bond, but that is a different move with its own authorization and should be arranged through your customs broker.

What happens if the cold treatment fails?

USDA will not release the cargo for entry. The importer generally chooses between re-treatment at an approved facility, re-export, or destruction. All three require prompt decisions, since demurrage continues to accrue and the produce continues to age while the choice is pending.

Does a treated reefer container need a genset for local delivery?

If the move is short and the receiver can unload promptly, some carriers run on residual cooling. For anything involving staging, extended transit, or uncertain dock timing, a genset is the safer choice — a temperature excursion after release can still cost you the load.