How to prepare the soil ?

[ZandraJoi]

From what I've learned if a plant flowers but doesn't produce fruit it's from lack of pollination. I've seen that happen at some friends home where they sprayed for mosquitoes. The pesticide kills the unwanted bugs but also doesn't differentiate between the good, beneficial ones. So they had no bees. No bees means no pollination.
What kind of insects do you have that are pollinators? Do you see them coming around?