tibicinus can get to be a monster plant. I grew mine with intermediate temps in as high light as I could get. I finally had to find a new home for it for it was just taking up too much room. The spikes were close to 10 feet long and the p-bulbs were over 18" high, a couple closer to 2 feet. I grew it in an empty basket watered frequently and fertilized regularly while in growth, less water when not in active growth.