Question: Here in San Fernando Valley, California, will I have any luck trying to grow asparagus, peanuts, potatoes, and/or rhubarb?
Answer: Potatoes are a great fall-winter-spring crop for you. Peanuts need a very light, sandy, fluffy soil, otherwise they'll accept your climate. Asparagus and rhubarb are iffy at best and are not recommended.
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When singular and plural spellings differ, as in peony and peonies, try both.