posted 2 weeks ago
Two things:
What kind of heat tolerant? Are we talking West or East, dry or wet, what kind? How intense?
And sort of from the last one, how much water and when?
If you're in Arizona like I am, your best bet is to get your hands on a normal variety and plant in winter. Much the same for the other states with hot, dry summers- the winter is better for grains (excepting millet, sorghum, corn and rice [if you can somehow grow rice in the hot dry]) and the summer is better for fruits- the standard fare of grapes, cherries, potentially apples, peaches, plums and figs. If it's hot and wet during the summer, much the same, but plant right as the rain is slowing down for winter but before it stops (or drops off), so everything can germinate. If you're doing it in dry places, soak your grains for a day or so before they get sown, and water until they sprout, then water occasionally.
I wish you luck in your planting!