Folks,

One year really stood out: fall of 2006. Check the archives for
yourself --
you'll see a lot of comments about the abundance of Amaryllis blooms that
year. You'll also see a lot of comments that there was no significant
rainfall that summer. "Warm, sunny, and dry" was a typical summary.

Here's a typical post, from Mary Sue:
http://pacificbulbsociety.org/pbslist/old.php/…

The comments about summer rain were interesting, because some very
experienced growers say that a good summer drenching is the thing that
But something else also stood out. Winter of 2005-6 was a heavy rain
year,
with totals in many places about 150% of normal. The preceding winter,
2004-5, was also pretty good.

This isn't much evidence to go on, but my preliminary guess is that
Amaryllis blooms in California are triggered by high rainfall in the
previous one (or two) winters.

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