I will go through my list of species Hippeastrum and explain my growing conditions. I do not believe there is magic involved, and some species are very adaptable, others are not. Correct watering is critical, otherwise Hippeastrum are very prone to fungal diseases. I do not routinely treat for fungus.
H. argentinum is from arid regions in northwestern Argentina. Unfortunately, although I have had them for several years, I have never brought my bulbs to bloom. I grow them in Mix #3 on a heated bench. They come into growth in mid to late spring and produce leaves throughout the summer. They go dormant at the end of summer, then remain dormant for six to seven months. I keep them very dry during dormancy.
H. aulicum comes from forested regions in coastal Brazil and is not cold tolerant. It is said to be an epiphyte, since it grows on tree branches, rocks and litter on the ground. I have found it to be easy, growing it my standard mix #1. In my conditions it dies back somewhat in the summer, comes into growth in the fall and blooms in the middle of winter, often in time for Christmas, but I do get blooms later in the spring also. I keep it dry with the bulbs planted on top of the mix, with about 1/4 of the bulb below the surface. I do not give it extra warmth.
H. blossfeldiae is from coastal Brazil, where it grows in sandy coditions. It is not cold tolerant. It has been easy to grow in mix #1 with a little added pumice. It needs good drainage to avoid fungal disease. No extra heat.
H. blumenavium (aka Griffiniopsis blumenavia)
I will be posting on more.