This is just a historical document: the planting has changed. Although the primula did valiant duty for several years, it was finally deemed too common and vulgar in color and exiled by the then master of the garden. I have snuck a few white flowered Primula japonicas back into this little bog, which gives me great delight (full of Dionaea, Vaccinium, pitcher plants and much more).
We have to grow Candelabras in pretty wet spots for them to do their multi-tiered thing, and for them to persist. I will never forget when I was in college in Ithaca, New York, coming on a bog on campus filled with thousands of giant candelabra primulas in all colors--something I would love to create somewhere--not in my current garden which is too dry and unprimulaic. Don't bother to look that word up, I just made it up.