A couple of years ago I started planting my pineapple tops from store bought pineapples. This summer 4 of them have produced a pineapple. Two of the 4 developed a 'slip' from the plant and I have left them to grow (they're getting very big) but the other 2 did not develop a slip. My question is, should I just pull these 2 up or will they eventually grow a slip or what? Frankly, I running out of room and I need to plant the new tops. Thanks for your help. Jim