Banana inflorescence

I am marking the plant to see how fast it is growing. Since yesterday, the inflorescence has emerged 1.5 centimeters or 19/32 of an inch. I was thinking the bud would emerge soon. However, I have been looking at the progression of the bud emergence of kcj1219's dwarf cavendish plant and have concluded that I will be lucky to see the bud by Christmas or the end of the year. His plant required about 10 days to progress from my banana's current stage to a fully emerged bud. His plant was outside in a sunnier, warmer climate in late October. My plant is indoors in a sunny window with grow lamps in a temperature-controlled environment.