Romneya coulteri

         My experience with Romneya is that once it is established (and this
 is often very difficult) you have the plant forever.  I tried to remove
 part of a large established clump (too big for the area) and found large 2"
 roots heading straight down, and if some root is left it will re-grow.  I
 seems to be an accpted practice to cut RC back to short nubs each year in
 the fall.  I have seen this in the native plant area of Descanso Garadens
 and I do this to my plant each season.  It grows back strongly.  Getting
 the plant started initally is always chancy as they often die.  I don't
 know why but 50% failure at initial planting does not seem to be unusal.
 They can be grown in pots, I have seen them flower in a 1 gallon size.
 With such a deep rooted plant the deeper the pot available the better.
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