Varroa Treatment Calendar (UK) – Seasonal Plan & Timing Guide
Last updated: 1 May 2026
This page gives a practical way to plan when to monitor and treat varroa across a UK beekeeping season, without repeating every detail from the specialist pages. It works best alongside the wider year in the apiary so you can link mite control to the rest of your colony management.
If you haven't already, start with monitoring methods, then use this calendar to decide what to do next, especially around July varroa monitoring and the August treatment period.
A realistic UK treatment calendar (principles first)
There isn't one perfect calendar for every apiary. A good varroa treatment calendar is built around:
- Monitoring: use a method you trust to see trends (see monitoring methods).
- Season: late summer is often the key window because it affects the bees that will overwinter, especially across the August treatment period and September follow-up.
- Brood: when brood is present, many mites are inside capped cells and harder to reach.
- Safety: always follow product labels and use appropriate PPE (see PPE for varroa treatments).
Example varroa calendar for UK beekeepers
This example is designed to help you think through timing. Adjust for your local conditions, colony strength and the treatments you are using.
| Season | What to do | Why it matters | Helpful links |
|---|---|---|---|
| Spring (build-up) | Monitor trends; consider biotechnical options if suitable (e.g. drone brood trapping). | Early control can reduce the rate of population growth into summer. | Monitoring • Non-chemical IPM • Year in the Apiary |
| Summer (honey flow) | Keep monitoring; avoid treatments that conflict with supers or conditions. | Maintains awareness while keeping honey handling clean and safe. | July varroa monitoring • Varroa hub |
| Late summer / early autumn | Main treatment window after supers are removed; re-check afterwards. | Protects the winter bee generation from high mite/virus pressure. | August treatment period • September follow-up • Chemical • PPE |
| Autumn (before winter) | Confirm mite levels are under control; tidy records and plan next season. | Prevents a "quiet failure" where colonies look fine but are carrying damaging mite loads. | September follow-up • Autumn colony preparation • Medicine records • Downloads |
| Winter (broodless periods) | Where appropriate, consider a broodless-window approach and record outcomes. | Some strategies work best when little/no sealed brood is present. | Varroa hub |
How to choose a plan that fits your apiary
Think of your plan as a "monitor → act → confirm" loop, using monitoring methods first and then fitting the result into the wider year in the apiary.
- Monitor using one consistent method (or two, if you like).
- Act when levels are rising or guidance suggests treatment is needed.
- Confirm by monitoring again after the treatment window.
Use a mix of approaches where appropriate:
- See non-chemical IPM methods for biotechnical options.
- See chemical treatment types for seasonal constraints and resistance awareness.
- Use PPE and safety guidance whenever handling treatments.
Record keeping and downloads
Keeping records makes your calendar easier next year. Record:
- Monitoring method and result
- Treatment type used (if any), dates and notes
- Any withdrawal period / honey handling notes
Frequently Asked Questions
Often late summer / early autumn after supers are removed, because varroa levels then can heavily affect the winter bee generation. In practice, many beekeepers focus on the August treatment period and September follow-up. Monitoring helps confirm what your colonies need.
Most UK beekeepers plan some form of varroa control each year, but the exact approach depends on monitoring, colony conditions and local guidance.
It depends on the product and label instructions. Many treatments have restrictions around honey supers, so always follow the label and current UK guidance.
When there is little or no sealed brood, more mites are on adult bees and easier to reach. Some strategies are designed around these windows.
Avoid under-dosing, follow label instructions, and use a sensible rotation of treatment types where guidance recommends it. Monitoring and good timing reduce unnecessary treatments.
Any clear system works: notebook, spreadsheet, or an app. Keep records of monitoring and treatments, and retain veterinary medicine records where applicable so you are recording treatments properly.
Related pages
- Year in the Apiary — month-by-month context for fitting varroa control into the wider season
- July varroa monitoring — use July checks to see whether pressure is rising before the main treatment window
- August treatment period — the main window for many UK colonies after supers are removed
- September follow-up — confirm treatment results and assess colony condition
- Autumn colony preparation — tidy records and make sure colonies go into winter in good order
- Monitoring methods — the page to use before this calendar and after treatment windows
- Varroa Management (hub) — wider overview of monitoring, timing and treatment strategy
- Recording treatments properly — keep medicine records clear and usable
- Free Downloads — printable summaries and templates