Here's a low-cost and very healthy breakfast of champions for young children:

[Retrograde]

96. Expensive to grow?

The things grow on trees ! Leaving aside the relative merits of the two fruits, I disagree that avocados are harder to grow than bananas. Once you've made the investment in the land and planted the avocado trees, it's mainly waiting around until they can be harvested - like other tree crops. Tree crops are becoming more popular in California because they're not as labor intensive as, say, lettuce. They're sub-tropicals, which limits where they can be grown, like bananas. I have a bearing avocado tree here just south of San Francisco, a region that does not support fruiting edible bananas: when the blasted squirrels leave any fruits there's more than enough for me and anyone on the street who wants them.

Bananas are cheaper as a rule because they're grown in regions with very low labor costs that historically have not been very kind to small farmers. There's more acreage devoted to bananas than avocados, making them more common and hence cheaper.