Badger, Florida, used to be a major pinapple producing state, till a really bad winter hit. They should grow well out in So Cal. Just buy a pinapple, and cut the top off, and stick it in the ground about an inch and a half or so. Keep it watered.
There are seeds, but few and far between. They are in the little hole sections on the peel. I have some, but have not planted them yet. Got enough pinapple plants around here as it is. The darn squirrels eat them, but the population is dwindling. My cat, is a phenomenal hunter! Unfortunately, that includes birds! He got another squirrel, and a mocking bird. They aren't nesting, now, so he must get them while they roost. Anywhoo, go get you some pinapples, and cut the top off, and grow your own. It will take a year or two to get fruit. You should be able to buy the plant at "Home Depot, or Lowe's", or just about any nursery even some with the fruit started, or ready.
Wayne