As of Fall 2013, there were 692 accredited RN-to-BSN programs offered throughout the United States, including more than 400 that are completely or partially available in an online format, as well as others conducted on-site at hospitals and clinics. See a partial list of RN to BSN online programs here.
Check the roots. The roots of a mature radish are roughly 1 inch (2.5 cm) in length, if not a little less. Gently scrape away a little soil just above the roots, next to the greens poking out from the soil, to check on the size. 1  You can scrape away the soil with your fingers or with a small garden trowel.
This is not the way to harvest radishes in a square foot garden. I would say a beginning point is 30 days but then you have to look at them. It might be 40 days depending on water and weather. These aren't like potatoes when you really don't know what root crops looks like below the soil.