Answer:
It's the only vegetable or fruit that is never sold frozen, canned, processed, cooked, or in any other form but fresh
Salty water everywhere but not sea in sight.
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
I wear a red robe, with staff in hand, and a stone in my throat.
A hole in a pole, though I fill a hole in white. I'm used more by the day, and less by the night.
I am owned by Old McDonald.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?