|Tepary Bean Plants are native to the Southwest.|
To isolate my beans I have chosen to grow different species of bean rather than isolate them in any other manner. I am currently growing three different kinds of beans – Southern peas, purple hyacinth beans, and tepary beans. The southern pea variety (cultivar: Purple Podded Pinkeye) is from the family Vigna unguiculata, while the purple hyacinth bean is from the Dolichos lablab family, and finally my Tepary beans (unknown cultivar borrowed from the library) is from the Phaseolus acutifolius family.
What I know about Tepary beans is that they are incredibly drought and heat resistant while Purple Hyacinth beans produce flowers which really attract pollinators. And pollinators are exactly what I need for some of my vegetables pollinate - as long as they are the same variety. There are so many bean varieties that, if you do have a lot of pollinators in your area, you may find it advantageous to grow different families to keep your favorite varieties pure.