The command for this Apiary Add-On can be found here: http://pastebin.com/iwpdKyh9
The mod guide can be found here: http://pastebin.com/zT5HyraT 

So after collaboration with a vanilla mod maker, caden20022002, I have made an Add-On that he supports for his Bees vanilla mod. I worked hard on this and think it really adds a great feature to an already great mod!

Using this mod, you can cross pollinate saplings to get other saplings, cross pollinate flowers to get other flowers, and even cross-pollinate crops to get other crops, so no more searching! You can even compress honeycombs to get silk (string) and in turn get wool! (Note, the cross-pollination recipe shown in the thumbnail image is subject to change from updates, the guide will always be correct though)

To craft an Apiary, you must place blocks like above, and have a bee fly above the dropper to activate it! (See Apiary mod guide here for more info)

The original mod can be found here: 
http://www.planetminecraft.com/project/18-honeybees---one-comand---beehives-honeycombs-beekeeper-helmets-and-more/

To get a command block; type "/give @p command_block" (you can type comm and press tab at the end) and press enter, then place it down, insert the command, and activate it by placing a redstone block next to it.