Ginger is among my favorite foods.  Love the taste and love the health benefits which are too numerous to list.  Here is a brief synopsis of the radioprotective qualities of ginger:

Ginger (Zingiber officinale) has been shown to display radioprotective effects, and is the subject of a Food & Functionreview by Manjeshwar Shrinath Baliga and co-workers from Karnataka and New Delhi, India.

In their review, the team highlight that ginger and its phytochemicals dehydrozingerone and zingerone possess radioprotective effects in in vitro tests. The mechanism of this action is proposed to be due to the free radical scavenging, antioxidant, anti-inflammatory and anti-clastogenic effects which may contribute towards the observed radioprotection. The observation that zingerone was selective in protecting only the normal cells and not the melanoma cells indicates its potential attractiveness for clinical development.

Ginger is pretty easy to grow.  Find a fresh looking piece of organic ginger at the supermarket, soak it in water for several hours and toss it in a pot with some soil.  As long as it stays reasonably warm, it should sprout OK.