How to Store Honey Supers Over Winter: UK Guide

How should you store honey supers over winter? Drawn comb is valuable because a colony does not need to spend as much time and energy rebuilding it next season. After extraction, supers should be dry, protected from wax moth and rodents, and stored so they cannot attract robbing bees or spread disease.

The best storage method depends on the type of comb. Clean, light-coloured super comb that has held only honey presents a lower wax-moth risk than dark comb that has contained brood or pollen.

Clean the supers before storage

Do not leave freshly extracted, honey-scented supers open in the apiary. They can attract wasps and robber bees, creating fighting and increasing the risk of disease transmission between colonies.

If supers are returned to bees for cleaning, do so in a controlled manner on a healthy colony and remove them promptly once the comb is dry. Avoid leaving exposed wet comb outside the hive. Scrape heavy deposits of brace comb and propolis from the boxes, then check every frame.

Look for damaged foundation, loose wires, cracked frame parts and comb that has held brood. Repair or separate questionable equipment now rather than putting it into a sound stack and forgetting about it until spring.

Which comb is most vulnerable to wax moth?

Wax-moth larvae feed on impurities within comb, including pollen and old pupal material. Dark brood comb and frames containing pollen are therefore more attractive and vulnerable than clean super comb that has held only honey.

The National Bee Unit advises against storing old, dark brood frames or pollen-containing frames in a simple outdoor ventilated stack. These need more secure wax-moth-proof storage and regular inspection.

Do not assume a frame is low risk merely because it came from a super. The first super above the brood box can contain pollen, and a queen that passed a damaged or missing excluder may have laid brood there.

Option 1: cold, ventilated outdoor storage

Cold conditions slow wax-moth development. The National Bee Unit describes storing boxes outdoors so cold air can move through the frames, provided the comb is suitable and the stack is protected from pests and weather.

A practical stack can be placed on a sound hive stand with a queen excluder beneath it, another excluder above it and a weatherproof roof on top. Leaving three or four frames out of each box increases the space between the remaining combs and improves airflow.

An in-stock National wire-bound queen excluder can help form a ventilated barrier at the top or bottom of a National super stack. It must be fitted without leaving larger gaps around the edges where mice or moths can enter.

Secure the complete stack against storms and animals. A 5m ratchet strap with hooks can hold boxes and roof together, but should be tightened only enough to make the stack stable.

Option 2: freeze and seal the frames

If comb cannot be stored somewhere consistently cold or physically protected from wax moth, freezing and sealed storage is a useful alternative. The National Bee Unit recommends placing frames in tightly closed bags, freezing them for 48 hours to kill all wax-moth life stages, then keeping them in the unopened bags until required.

The bag must remain properly sealed after the frames leave the freezer; otherwise adult moths can lay fresh eggs and reinfest the comb. Allow for condensation and make sure comb was dry before packing. Protect sealed bags from rodents and accidental punctures.

What about acetic-acid fumigation?

The National Bee Unit also publishes a method for fumigating stored comb with acetic acid. This involves concentrated acid, corrosive vapour and specific protective equipment. It should not be improvised from a short online summary.

If considering this method, follow the current National Bee Unit fact sheet in full, use the specified protective equipment and observe all ventilation and handling instructions. Acetic acid can corrode exposed metal, including foundation wires and hive fittings.

Inspect stored supers during mild weather

A cold outdoor stack is not maintenance-free. A mild winter can allow wax moth activity to continue, so inspect stored equipment periodically without waiting until spring.

Warning signs include:

• silken tunnels across or beneath the comb;
• cream-coloured larvae with brownish heads;
• dark specks of frass;
• webbing between frames;
• boat-shaped gouges where greater wax-moth larvae have pupated against wood;
• a musty smell or unexplained debris beneath the stack.

Separate affected equipment immediately so the problem does not spread. Follow the National Bee Unit guidance for freezing or other appropriate treatment, and remove badly damaged comb from use.

Keep equipment linked to its apiary where practical

Marking supers and returning them to the same apiary—or the same colony where practical—supports good barrier management. Do not mix equipment from colonies where disease is suspected. Any box or comb associated with a notifiable disease must be handled under the instructions of the Bee Inspector.

Store equipment above the ground in a clean area, away from mice and other pests. Keep the boxes square, the frames upright and the roof secure so water cannot enter.

Prepare for spring while storing

Make a note of missing frames, damaged foundation and boxes needing repair. Drawn comb should be retained only while it remains sound, hygienic and fit for use. Planning replacements during winter prevents a rush when colonies begin expanding.

Before supers return to colonies in spring, inspect every frame again. Check for wax moth, mould, rodent contamination, loose wires and damaged comb. Equipment should be clean, dry and free from anything that could harm the bees or contaminate honey.

Winter super-storage checklist

• Dry extracted comb and do not leave it exposed in the apiary.
• Separate light super comb from brood or pollen-containing comb.
• Choose cold ventilated storage or freeze-and-seal protection.
• Keep rodents, rain and adult wax moths out.
• Secure outdoor stacks against wind.
• Inspect during mild winter weather.
• Label equipment and keep questionable comb separate.
• Repair or replace damaged frames before spring.

The key point

Good winter storage keeps drawn comb dry, secure and unattractive to wax moth. Clean light super comb may suit a protected, ventilated outdoor stack, while higher-risk comb needs wax-moth-proof treatment and storage. Whichever method you use, regular inspection is what prevents a small problem becoming a stack of ruined frames.

For current technical guidance, read the National Bee Unit’s Wax Moth and Fumigating Comb fact sheets.