Most of the flowers used in organic flower delivery are grown locally. So therefore, if you lived in southern California, the flowers would be grown somewhere in southern California and then sent to you.
Plants can be grown from seed that come from flowers.
Cotton
Aloe is commercially grown in several countries around the world. These countries include South America, Central America, Asia, and Africa.
Bananas can be grown from a seed, although commercially they are grown from their rootstocks.
Most types of mushroom grown commercially are grown for consumption as food. The common brown mushroom, shitake mushroom (japanese), portabella mushroom, and some types of truffles. I'm sure there are other types of mushrooms grown for other purposes (IE: medicinal), but there are probably far less of those.
Yes
The commercially grown ones are grown mostly in temperate areas.
Fat it's true fat is hardend to make softwood
rice is not grown commercially in Hawaii.
Zinfandel is not grown commercially in the UK.
A vast majority of the commercially harvested teak is grown in Indonesia. The Republic of the Union of Myanmar (formerly Burma) is also a major exporter.