Mexican Pinguicula such as Pinguicula moranensis, Pinguicula moctezumae, and Pinguicula agnata are some of the easier butterworts to grow. These species have heterophyllous leaves--the summer leaves are carnivorous while the winter leaves are succulent and not carnivorous. The plants like warm humid conditions when in the summer, carnivorous state. During the winter when they are in the succulent state they should be kept cooler and drier.

There is some controversy over the best way to grow Mexican Pinguicula. Techniques that some growers swear by are death in other hands. In the wild, many Mexican Pinguicula grow in seasonal fog forests on moss covered limestone cliffs and tree trunks. Some growers have good luck trying to reproduce these conditions by growing their plants on live sphagnum moss wired to boards or tree bark in very humid conditions. Plants in sphagnum moss totally saturated with water such as in a tray system will tend to rot.

A common soil mixture for plants grown in drier conditions is to use one like that used for most of the acid soil loving Pinguicula. This would be two parts peat, one part silica sand, one part perlite and one part vermiculite in a clay pot. Grown like this the plants would sit in no more than a cm of water and be top watered only in the summer when they carnivorous leaves.

Other growers have good luck with one part each of peat, dolomitic or limestone sand, and perlite. Some use plastic pots and add more vermiculite leaving out the peat. If you use the classic tray method you may need to increase the perlite to 50% to keep the plants from being too wet. You have to find a technique that works in your situation and for the exact species or variety you are growing.

For good germination the seeds need temperatures between 15°C and 25°C (60°F to 80°F) and can be started indoors and outdoors. To prepare a pot to start your seeds, fill it most of the way to the top with your favorite mix and cover that with a thin layer of finely chopped live sphagnum, fine vermiculite, or a sifted part of your mix. Place the seed on the surface of the medium and don't bury it. The soil should be damp and not sopping wet. You may want to put the pot in a plastic bag. Seeds germinate in 4 to 8 weeks.

To maintain these species long term they need seasonal light cues and the seasonal changes in moisture. The seasonal changes are cued by light, not moisture. Water the plants according to the leaf type, not season. When the plants have carnivorous leaves they need to be kept moist and enjoy high humidity. When they have succulent leaves, usually during late winter, the plants need much less water. Keep the soil lightly damp. Some species can be totally dry if the air is very humid.

The plants can be propagated by carefully removing succulent leaves.  The best time is just before new carnivorous leaves appear in the late winter or early spring.