As I mentioned earlier I did a lot of research last summer because I wanted to grow my garlic much larger if possible. And I too had been following the standard advice of planting in October for my zone. But I read a good research paper that discussed the planting temperature. Like you it is still really hot here in October. So last fall I planted in November once it had cooled down a bit. So far, my garlic seems to be right on schedule doing quite well.