Hive Strength Assessment Before Moves

Moving understrength hives to a pollination site is the leading cause of contract dispute claims. It's also one of the most preventable. The problem isn't that beekeepers don't know their hives are weak. It's that they find out at the wrong time, often after the truck is loaded or after delivery.

A structured pre-move hive strength assessment catches understrength hives before they become a contract problem. Do it consistently, document it in PollenOps, and you'll know before loading exactly which hives make the cut and which need to be replaced, built up, or excluded.

TL;DR

• The California Almond Board's research supports 6 frames of bees as the minimum effective colony strength for almond pollination.
• Many growers now specify 8 frames for premium contracts, with rates at $200-215/hive versus $185-195 for 6-frame minimums.
• Hive strength assessment should be documented by yard, date, and assessor to create a defensible record for contract compliance.
• A colony assessed at the required strength in January can fall below minimum by February delivery if varroa loads are high or weather stress is severe.
• Third-party inspection at delivery is the cleanest resolution for strength disputes and protects operators as well as growers.

Why Pre-Move Strength Matters

No competitor provides a structured pre-move strength checklist tied to contract requirements the way PollenOps does. Most beekeeping apps offer general hive inspection records: a place to note what you saw on a visit. What they don't offer is a checklist that's automatically calibrated to the minimum strength requirements in your specific contract.

This distinction matters. A general inspection record shows you assessed the hive. A contract-linked checklist shows you assessed the hive against the 6-frame minimum required by your grower, and that this specific hive either met or failed that threshold.

When a grower disputes the strength of your delivery, you pull your pre-move assessment. If it shows every hive was at 7+ frames before loading, and your delivery GPS record shows they arrived the same day, the dispute is over.

PollenOps checklist flags contract non-compliance risk before you load a single hive. That flag is the operational intervention that keeps weak hives off the truck.

What to Check Before Moving Hives to a Pollination Site

A pre-move strength assessment covers four core indicators. Work through each one for every hive you plan to move.

1. Frames of Bees

This is the primary strength metric in most pollination contracts. Count the frames that have 80% or more bee coverage on both faces. For contract compliance purposes, count only full coverage as a "frame." Don't round up a 60% covered frame to one.

For California almond contracts, the standard minimum is 6 full frames. Other crops vary. Know your specific contract minimum before starting the assessment.

2. Brood Frames

Count frames with active brood, meaning open larvae and capped brood on at least 50% of the frame area. Solid brood patterns indicate a healthy, laying queen and strong colony development. Spotty patterns may indicate disease, queen failure, or nutritional stress.

Most contracts specify a minimum brood frame count alongside frames of bees. A hive with 8 frames of bees but no brood may be a swarm cluster rather than a functional pollinating colony.

3. Queen Presence and Activity

Confirm queen presence either by seeing the queen directly or by verifying eggs. Fresh eggs (standing upright in cells, visible with magnification) indicate laying within the past 72 hours.

A queenless colony may still have bees at the time of assessment but will decline rapidly at the pollination site without the brood cycle maintaining population. Don't move queenless hives.

4. General Colony Health

Look for signs of disease: foulbrood (unusual smell, sunken or perforated cappings), sacbrood (twisted larvae), or high varroa mite load (visible deformed wing virus symptoms, mites on brood). Move only healthy colonies.

Also check for adequate stores. Hives going to a new site need enough honey and pollen to sustain themselves for 3-5 days while bees orient and begin foraging the new crop.

How to Assess Hive Strength Quickly in the Field

For large operations assessing hundreds of hives before a move, efficiency matters. Here's a fast but thorough assessment protocol.

Quick method (under 3 minutes per hive):

1. Smoke the entrance and remove the lid.
2. Pull two frames from the center of the brood box, one toward each side. Count bee coverage.
3. Check for eggs and brood pattern on these two frames.
4. Estimate total frames covered from what you can see without pulling all frames.
5. Make a go/no-go decision and record it.

This method isn't as precise as a full frame-by-frame count, but it's accurate enough for contract compliance assessment at speed. If you're uncertain about a hive, pull more frames. Don't give weak hives the benefit of the doubt. You'll pay for it at the grower's site.

For maximum accuracy and documentation:

Pull every frame in the brood box. Count each one individually. Record in PollenOps before moving to the next hive. This takes 8-12 minutes per hive but creates an unambiguous record for every hive in the load.

Most operations use the quick method for routine assessments and the full method for high-value contracts or when hive conditions are variable.

Step-by-Step: Using the PollenOps Pre-Move Assessment

Step 1: Open the Pre-Move Checklist for the Yard

In PollenOps, navigate to the yard you're assessing and open the pre-move assessment checklist. Select the contract this move is associated with; the system will load the contract's minimum strength requirements into the checklist.

Step 2: Work Through Each Hive

For each hive at the yard, enter your assessment data: frames of bees, brood frames, queen status, health notes. PollenOps shows you the contract minimum alongside your entered value so you can see immediately whether the hive passes or fails.

Step 3: Review the Compliance Summary

After entering all hives, PollenOps generates a compliance summary for the yard: how many hives passed, how many failed, and the average strength metrics across the load. You can see at a glance whether you have enough compliant hives to fulfill the contract or whether you have a shortfall to address.

Step 4: Address Understrength Hives

For hives that failed the assessment:

• Combine with stronger hives if colony population is the issue
• Replace with stronger hives from another yard
• Exclude from the load and adjust the contracted hive count (notify the grower in advance)

Don't move hives that failed the checklist. The short-term convenience of filling a full truck isn't worth the dispute risk.

Step 5: Auto-Populate the Compliance Report

Once the assessment is complete, PollenOps auto-populates a contract compliance report for the yard, showing the assessment date, hive count assessed, compliance percentage, and average strength metrics. This report becomes part of your delivery documentation and can be shared with the grower.

This is the link between hive strength requirements contracts and your delivery documentation. The compliance report shows you didn't just promise compliant hives. You verified them before loading.

What Is the Minimum Strength Score Needed Before Moving Hives for Pollination?

The minimum strength you need is defined by your contract. There is no universal standard. It varies by crop, grower, and region.

As a floor: Never move a hive below 4 frames of bees to a pollination site under a contract with a 6-frame minimum. The transit stress of a move typically reduces apparent strength by 10-15% in the first 24-48 hours as bees reorganize after transport disruption.

Recommended buffer: Assess against a threshold 1 frame above your contract minimum. For a 6-frame contract, only move hives that assessed at 7 or more frames. This buffer accounts for transit losses and the grower's spot-check timing.

For high-value contracts: Assess earlier and then reassess immediately before loading. A hive that was at 7 frames two weeks ago may be at 5 frames now due to swarm loss, disease, or weather-related dearth.

For hive count verification purposes, your pre-move strength assessment is the reference point for delivery compliance claims. Make sure it's thorough, documented, and timed close to the actual move.

Common Mistakes in Pre-Move Assessment

Assessing too early. An assessment three weeks before loading loses relevance. Colony conditions change significantly in two to three weeks. Assess within 72 hours of loading for high-value contracts.

Not recording results immediately. Memory-based records written hours or days after the assessment are reconstructions, not contemporaneous records. Enter data as you assess each hive.

Optimistic counting. Counting partial frames as full, or counting bees clustered on the outside of the hive as frames of bees, inflates your apparent count. Be precise.

Skipping queens on healthy-looking hives. A hive can look strong while being queenless if a laying worker situation hasn't fully developed yet. Confirm eggs or queen on every hive headed to a pollination site.

Forgetting to re-assess after waiting. If you assess hives on Monday and don't load until Friday due to weather or scheduling, reassess before loading. Four days is long enough for conditions to change significantly.

FAQ

What should I check before moving hives to a pollination site?

Check frames of bees (full coverage count against your contract minimum), brood frames (evidence of active laying queen), queen presence (direct observation or fresh eggs), and general colony health (no disease signs, adequate stores). For each hive, record results in PollenOps against the specific contract minimum requirements. Hives that fail the assessment should be combined, replaced, or excluded from the load, not moved.

How do I assess hive strength quickly in the field?

Use a two-frame pull method: remove two frames from the center of the brood box, check bee coverage and brood pattern, and estimate total frame coverage from what's visible. Make a go/no-go decision and record it immediately. For routine assessments, this takes under three minutes per hive. For uncertain hives, pull all frames for a precise count. Enter results in PollenOps as you go. Don't rely on memory for end-of-day data entry.

What is the minimum strength score needed before moving hives for pollination?

Use your contract minimum as the floor, but assess against a threshold one frame above it to account for transit stress and timing variation in the grower's spot check. For a contract requiring 6 frames, only move hives that assessed at 7 or more frames. Move timing also matters: assess within 48-72 hours of loading. An assessment from two weeks before loading doesn't account for the colony changes that have happened since.

How is hive strength measured for commercial contract compliance?

Hive strength is typically measured by counting frames of bees: the number of frames in the brood box that are covered (both faces) by worker bees. A frame covered on both faces counts as one frame of bees. Some assessors use a modified approach counting only the top face of each frame. The contract should specify the measurement method, since a hive assessed at 6 frames by one method might be 5 frames by another. Third-party inspection using a consistent, documented method is the cleanest standard for compliance.

What causes hives to fall below strength requirements between assessment and delivery?

Several factors can reduce colony strength between pre-season assessment and delivery: high varroa loads with insufficient treatment response, poor winter weather in northern states during transport south, queen failure or queen loss in the weeks before delivery, and nutritional stress from limited forage. Commercial operators typically re-assess colonies 1-2 weeks before departure to confirm strength has been maintained, replacing any colonies that have declined with stronger hives from their reserve inventory.

Can strength requirements be met with a recently split colony?

No. A recently split colony (within 4-6 weeks) will not have a full brood cycle's worth of adult workers emerging to maintain population. A split colony may appear to have adequate frames at the time of split but will decline in population over the following weeks as older workers die without emerging brood to replace them. Colonies going to almond pollination should have had their most recent split at least 8-10 weeks before delivery to allow full population recovery.

Sources

• USDA Agricultural Research Service
• Bee Informed Partnership
• American Beekeeping Federation (ABF)
• Almond Board of California
• Project Apis m.

Know Before You Load

Every hive that leaves for a pollination site should have a documented pre-move assessment behind it. That assessment is your proof of contract compliance, your protection against strength disputes, and your own quality standard.

Get Started with PollenOps

Hive strength documentation is the foundation of contract compliance and dispute prevention. PollenOps structures strength assessment records, delivery confirmations, and inspection data so you have the evidence you need when questions arise about contract performance.