Depending on the part of the country, bitter melon plants are sometimes for sale at farmers markets, but you can also purchase them online. Bitter melon seeds are planted in warmer parts of the country where they will germinate.
Bitter melon grows fruit on a fast growing vine. Indian and many Asian cuisines use bitter melon as an ingredient. In parts of the country with large Indian or Asian populations, bitter melon seedlings are sometimes available in farmers markets. For example, Hmong farmers sell bitter melon plants at the farmers market in St. Paul, Minnesota.
If plants are unavailable locally, gardeners can purchase bitter melon plants online. For example, Amazon offers both bitter melon seeds and plants. The Kitazawa seed company also sells bitter melon seeds online.