Increasing colony numbers is a natural aim. But unplanned growth can weaken an operation rather than strengthen it.

Four limits on growth

1. Forage capacity

The number of colonies a site can hold is limited by its forage. Excessive density:

• Lowers yield per colony
• Increases robbing
• Accelerates disease spread
• Deepens competition with wild bees

A hive scale shows the limit: if weight gain per colony falls as numbers rise, capacity has been exceeded.

The answer is not more colonies but a new apiary.

2. Labour

This is the most underestimated limit.

In the swarming season every colony needs checking every eight days. Work out how many colonies you can check at that interval; that is your limit.

A beekeeper who cannot keep up stretches the interval; swarms are lost, disease is seen late, losses rise.

3. Equipment

As colonies increase so must hives, frames, drawn comb, supers, feeders and nucs.

Drawn comb in particular is a bottleneck; only so much can be produced in a season.

4. Capital and market

As production rises the sales channel must grow with it. Honey that cannot be sold costs more than honey never produced.

How to grow

• Splitting: The cheapest route; keeps your own genetics and brings in no disease
• Collecting swarms: Free but of unknown origin; quarantine is needed
• Buying nucs: Fast; carries disease and genetic risk
• Buying queens and splitting: Speeds growth and improves genetics

Splitting is the soundest route on both cost and biosecurity.

A realistic rate

Doubling colony numbers in a year is technically possible, but it means largely giving up that year's honey.

The balance is to devote part of the season to growth and part to production.

Reserves

Growth is not only increase; it is the capacity to absorb loss.

Winter losses are normal. Keeping enough nucs to cover them is cheaper and safer than buying colonies in.

When to stop

• Yield per colony is falling
• Inspections are stretching; swarms are being missed
• Disease and Varroa appear more often
• The harvest cannot be processed; comb is waiting
• The work has stopped being enjoyable