I'm in the high desert/ southeastern Sierra region of Southern California. my ground is sandy but has caliche hard pan and drainage is poor in some areas. i have mulched my yard with woodchips from a local arborist and have been planting trees and a small garden which are slowly evolving over the last few years
I've been growing arugula the last few winters. It did so well i threw the seeds anywhere that nothing else will grow. It grows everywhere, starting small in late summer and growing through the winter up to 4 feet high, if you let it. The flowers have a subtle light and sweet fragrance. In February and March i have fields of white blooms covered in bees. The hummingbirds also like it. I pull out large bundles of arugula and feed it to my chickens.
After it goes to seed but before the seed pods dry and spread, I chop and drop it to other areas of the property for the next winter where I have trouble growing anything . The worms come where I have arugula growing and will eat the roots of what is left behind. It gets quite bitter so I eat it sparingly myself or find younger plants.
Mostly i love to have the flowers in the garden through February and it acts as a natural mulch. I find it surprising that more people aren't talking about arugula in dry climates. Any thoughts?