Can I use a citrus fertilizer from this plant? I just purchased this plant yesterday. It's about four feet tall. Also, how can I find out the zpne I'm in? I clicked onto the blue information line in the Papaya section but it went straight to Olives! Also, should I replant the tree (it's in a pot) with dark, rich soil?
It looks like you are in gardening zone 9b. Here is the map of Florida:
If possible, replanting in the ground is ideal for the tree's growth. Citrus fertilizer is ok to use but not ideal, because it is heavier on nitrogen. A balanced fertilizer (equal parts N,P, and K listed on the label) or compost is better for papaya. Don't fertilize directly in the planting hole, since this can burn the roots. Wait for several weeks after planting to fertilize (or you can add compost earlier, which is safer).
This article will help you with plant care and choosing a site to plant: