ScotTi, I am assuming the plant in your photo is a "pup" off a large plant you grew to maturity, and ate the fruit. If that is correct, you can place the bottom of the stalk in a container of water, or plant it in rich soil and keep it a bit on the dry side until its roots are well developed, then plant it into a larger pot. Either way works fine. You really do not have to wait for it to form roots, they are already there. If you pull another leaf off the base of your plant and examine the stalk closely, you will find that under that leaf are a number of brown dormant roots between the stalk and the leaf, just waiting for a little water and some nutrients to jump into growth. If you purchase a fresh ripe pineapple (should you be able to find one) in the grocery store, cut the top off the fruit, remove any fruit from around the cut part of the stalk (this will sometimes get moldy and cause problems getting a healthy start for your new plant) remove the small leaves from around the base of the stalk, and either put the cut end of the stalk in water, or pot it up. While you are removing the small leaves from the base of the pineapple top, notice around the stalk under those leaves, there should be many dormant roots packed between the stem and the leaves. These are just sitting there waiting for a chance to grow. I have a plant in my greenhouse right now with a half ripe fruit, just waiting for spring to finish maturing. All my neighbors are jealous, they swear they have never tasted pineapples as good as mine. Have fun.
