Horseradish is at its best in fall and winter. Like so many other root vegetables, however, it stores well and is often available in decent shape well into spring. Jerusalem artichokes/sunchokes are brown nubs, that look a bit like small pieces of fresh ginger.
Using Ms. or Mrs. in a cover letter depends on whether or not you know the marital status of the woman. If you are ever uncertain, it is always safe to use Ms. because it does not make an assumption about her marital status.
When you are writing a cover letter, there is specific information that needs to be included. Your cover letter will include a contact section, a salutation, an introduction to the hiring manager, information on why you are qualified for the job, a closing, and your signature.