Nice to hear my name in context with growing Heliamphora.
Maybe it's possible to grow some easier hybrids of Heliamphora on a windowsill but I have never tried it.
If you want a plant which does not only survive but also get the typical features and colours you need
to place it under high light levels in a humid but still cool environment. I doubt that these conditions are
possible on a windowsill.
It took me some time to find the right place and the equipment to get the best way for growing these
plants indoors which unfortunately is also not the cheapest way.
Here is a recent shot of my Heliamphora folliculata from the Murosipan Tepui...