
Throughout California, literally tons of the orange-flowered annual type most frequently thought of as THE California poppy, and possibly originating in Antelope Valley in souther California, were sown by Boy Scouts, by garden clubs, by landowners, by gardeners, inadvertently swamping out the individuality of each area's own form of the California poppy. Some were even dropped from airplanes, as "beautification" measures.
It has been so interesting to grow our own form on the coast. As a perennial, it behaves quite differently from the annual inland orange form (I am referring to them as "forms" since the subspecies have been eliminated taxonomically, at least for the moment). The tap root can get immense, as long as two feet, and thick as a baseball bat (which we have experimentally used it as).
In dry years, it flourishes, and I used to worry that it was too aggressive, eliminating other wildflowers. Then I observed that in wet years, it was substantially knocked back, because it doesn't like wet feet. Now I just relax, counting on an ebb and flow of the coastal form of the California poppy, so that it is only one element among many in the garden.
The bouquets must be seen to be believed. Some flowers open 4" wide by the end of their time in the vase. Many songs have been written in praise of the California poppy, but none seem to mention the distinction between Eschscholzia californica and Eschscholzia californica var. californica, formerly, var. maritima. It probably doesn't scan well.