Medium Boxes vs. Deep Boxes

Each year I get a lot of people asking me why I only sell medium boxes. I thought I would explain a little here on the blog.  Traditional hives typically have 2 deep boxes which are 9 5/8 inches deep and theses are called the brood boxes.  This is where the queen will do most of the laying of eggs and the rearing of bees.  Then most people would add honey supers or medium boxes 6 5/8 inches deep.  Average hives in Utah will typically fill two of them if we have a good honey year and maybe even more.  Most people will harvest the honey supers and leave the bottom two boxes for the bees.  The Queen will slow down the rearing of brood and they will start to back fill it with honey in the fall.

Another train of thought that is becoming more and more popular is to have one size of equipment (all deeps or all mediums).  That way all the frames are interchangeable.  This also eliminates 99% of the need for a queen excluder.  The 1% is for other reason besides keeping the queen out of the honey suppers.  You will often hear this method of beekeeping as unlimited brood rearing.  You let the queen rear as much brood as she can and you keep adding boxes to give them room for honey.  In the end you can manipulate the hive so the brood is in the bottom and the honey is in the top.  The theory behind it is it doesn't hinder the bees from storing honey or raising brood.  Queen excluders can slow down the bees progress since they have to get through the screen.  Some times they wont move up through it unless the comb is drawn out and sometimes they even need honey or brood above it so that it encourages them to get through it.  This in my opinion is a clear indication they don't want an excluder in there.  I am only discussing deeps and mediums because the shallow supper at 5 11/16 just doesn't seem quite big enough. In most places in Utah you will most likely need to over winter the bees in either 2 deeps or 3 mediums. 

Pros and Cons of Deeps

• Pro - you need less boxes (less equipment and less money)
• Pro - most nucleus hives for sale are deeps
• Cons - they get HEAVY (deeps can weigh 100 lbs full of honey).  When you have to move the box during an observation you not only have to lift the 100 lbs but you then have to pry the boxes apart thanks to propolis.
• Cons - due to the weight of the honey on the frame, I have had more top bars break away from the side bars because they cannot handle the weight.
• Cons - often the bees will be slower to move into a deep box with new foundation because they have a lot more area to manage in order to regulate the temperature in the spring.   

Pros and Cons of Mediums

• Pro - easier to handle because they weigh less ( mediums can weigh up to 60 lbs full of honey)
• Pro - frames seem to last longer.  They don't have as much weight pulling down on the side bars
• Pro - bees seem to expand into medium boxes quicker
• Pro - equipment seems to last longer
• Cons - It requires more boxes (more cost)
• Cons - It may require more frames to observe if you are trying to find the queen.

I am starting to get away from all of my deep boxes.  If I use them I try to have only one on a hive and try to keep it on the bottom.  In my opinion, as a hobbyist it makes more sense to have all the same size of equipment and mediums are so much easier to work with. 

Happy beekeeping!