Ken, I am not sure of an average. Seems some get them to bloom as early as 5-6 mths. Many not until a few years old. Not sure if there is a true way to force or make them bloom other than when they feel like it.
Outside of giving them strong sunlight, which does not have to be strong sun all day. Many people growing these as in Arizona will often use 60% shade cloth over them.
Wish I had the absolute answer. Would do it.
Rick
