Mr. Speaker, it is simple. When there are more varieties, there is more choice. Seed producers want to promote certain varieties by using displays and other methods.
Limiting the number of varieties automatically leads to the sale of more expensive seeds. There are fewer and fewer varieties being sold with a lot of seed in the packet. Instead of putting 100 seeds in a packet, they put 10 and instead of selling the packet for $2.95, they sell it for $4.95. It is not hard to see that the profit margin goes up. The seed companies' strategy is to limit choice in order to increase their chances of selling more. Someone who has a garden with 50, 100 or 150 plants will have to buy several packets of seed instead of just one packet.