Does anyone know what kind of fir this is and what's wrong with it?
Sure looks like a Norfolk pine, which is usually used as a house plant.
Called a Norfolk Island Pine, though it's not a pine but one of the Araucarias. Its needles die off for many reasons....pick one: sun scald, cold or hot drafts, spider mites, improper watering, cold damage, and more.
Whitecap is right; it is a tropical plant that is more likely to be discussed in the Houseplant Forum.
not uncommon to lose lower branches... if grown indoors.. in too little light ...
they usually get throw out.. when they start scraping the ceiling as a houseplant ...
but you might have options in FL.. that i dont have in MI ...
as noted.. houseplant forum ..
Thanks so much guys. I'm new to this site and obviously a novice to plant care. I'll repost my question in the Houseplant forum.
They can grow outdoors in the Fla keys and maybe extreme south mainland Fla. They look totally different when grown outdoors. The needles point up instead of hanging down. They are skinny and tall outdoors.
If poster is from Florida, they are NOT houseplants.
However, since this one is grown in a container, the problem may be more a 'container' gardening issue. But rhizo gave some good ideas on where to start looking.