FUN FOOD FACT FOLLOW-UP! Fibonacci numbers are series of numbers in which each number is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc. Crown cutting cultivation is also called the ‘cut the top’ method. Pineapples can be rapidly multiplied by means of crown sections in a peatmoss mixture. Each section can produce a new plantlet within 65 days.