Unlike most fruits, pineapples are not grown from seeds. Common commercial varieties of pineapples are "self-incompatible," meaning that the plants' pollen cannot fertilize members of the same variety.
So unless different varieties are grown next to one another and flower simultaneously, the plant will produce a seedless fruit that develops without fertilization.
The plant consists of stocky leaves whorled around a central stem. In a healthy pineapple plant, the tapered, sword like leaves can grow up to about 5 feet (1.5 meters) long.
The pineapple fruit grows out of the top of the central stem. The fruit is actually the result of dozens of individual fruit-producing flowers that have fused into a single fruit, which is capped with a "crown" sporting numerous short leaves.
Growing pineapples is easy if you get the basics right. Check out some tips on how to grow pineapples at Tropicalpermaculture.com.