Thanks for your reply, Glen. The reason I asked is that I have a spike on one of my tipo variety plants, but I have no idea what I did (if anything) to encourage the plant to flower. My coerulea walkerianas are easy and reliable bloomers, but the tipo plants in my collection are unpredictable. Some years they flower profusely, and other years they simply put on lots of new growth and refuse to bloom. I'm happy that my plant is getting ready to bloom, but it's a bit frustrating to be in the dark regarding what triggered it to bloom (perhaps the tipos are, in comparison to my coeruleas, just temperamental!).
Steve
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