hypolasia--dennisii--coriacea--praetorii--
these may be easy ones for others to grow but I have had issues with
all of the ones listed above.
david
I can't really say which varieties are best, but I can say that the
ones I keep away from heating and air conditioning and in very bright
places do much better. Also, the thinner leafed hoyas don't seem to
do as well in my home. I usually lose them eventually, the only one I
have right now is CV Iris Marie, and it is doing good with very little
attention (like most of my plants)
If you are looking for hardier plants, and the ones that will give you
early pay off with flowers, then offhand I would say to definitely
include obovata, cinnamomfolia, pubicalyx, nummularioides, and fungii
in your order. They will grow quickly, be pretty robust, and bloom in
less than a decade!