Hi all ,
I can only agree with Swords...ampullaria just LOVES high humidity levels AND high temperatures...mine ar growing very fast since the day (a few months ago...) I put them in a special "Nep enclosure"...
Temperature is never under 20°C=70°F (maximum of 45°C=110°F this summer) , humidity level never under 70% in the air (in my conditions)
since that day , my ampularias is pitchering correctly , as for the moment they're also pitchering from the stem ! I have two different clones , but the two same phenomena. my plants also build roots that comes out of the stem....as if the plant wants to re-implant itself !
this happens in perticularly special places : the upper parts of planting-medium from the other pots on wich the long stem (80cm) is lying on...
maybe this are good conditions for re-implantation , I dont know...but it's funny to observe that
light : I can also agree to Swords...the more light , the more they like ! but not to near to the bulbs if there is no re-circulation of the air : in that sector , the air is too dry for ampullaria...it will burn out and become brown leaves if too dry...also pitchers are smaller...
in addition to all that , I must tell you I have a enclosure with a 10cm heated water level uner the plants. the plants are in single pots , and are standing on a PVC-layer what is a few cm over the water surface (I drilled 1000ands of holes in it , what a job ! )
there's also a humidyfier (working with the ultra-sound principle) that works for half an hour every three hours....
hope it helped
Patrice - France