Pots with holes on bottom....drill side holes too?

[jimbojones]

Hello, I currently potted up a few plants s/h. The pots have about 5 holes on the bottom and I have them sitting in a small round tray with about 1" of fertilizer mix drained into the bottom. Is it recommened to also drill holes in the pot about an 1" up from the bottom on the pot too? Thanks

edit. the title should say pots, not trays.