Pinguicula care
Pinguicula
Mexican Butterwort
Succulent insect-eating plants with sticky, colorful leaves
Pinguicula, also known as butterwort, catches its prey not with traps or cups, but with sticky droplets on the leaf surface: a passive, yet remarkably effective sticky trap against fruit flies. Mosquitoes may occasionally be caught, but these plants do not really attract them. This guide specifically covers Mexican and Central American (subtropical) species such as P. moranensis, P. ehlersiae, P. gigantea, P. 'Weser', P. 'Aphrodite' and P. cyclosecta.
In Europe, native, hardy species also occur (such as P. vulgaris and P. grandiflora), which require a true winter dormancy with a frost period and sometimes even overwinter outdoors. The Mexican Pinguicula in this guide are subtropical and frost-sensitive: they grow indoors or in a greenhouse all year round, do not need frost and cannot tolerate it. Do not confuse the care of these two groups.
Origin & Habitat
The genus Pinguicula comprises over 100 species, spread across almost every continent in the Northern Hemisphere. The Mexican species form a separate, highly specialized group within this genus: they grow mainly in the mountainous regions of Mexico, Guatemala, and the rest of Central America, often on calcareous rock faces, moss-covered slopes, or among humus in forest areas at altitudes of 1000 to 2500 meters.
Unlike many other carnivorous plants, these Pinguicula do not grow in acidic peat bogs, but rather on mineral-rich, often calcareous soils with good drainage. Because their natural environment experiences distinct dry and wet periods, they have developed a remarkable adaptation: the formation of two completely different leaf forms throughout the year.
Summer and Winter Rosette
Many Mexican Pinguicula switch between two growth forms throughout the year:
During the growing season, the plant forms broad, fleshy leaves covered with sticky glandular hairs. This is the form in which the plant actively catches and digests insects.
In response to shorter days and drier conditions, the plant forms a compact rosette of small, thick, non-sticky leaves without trapping fluid. In this phase, the plant stops catching prey and lives off its reserves.
Summer rosette of a Mexican Pinguicula in full growth
A lot of Mexican Pinguicula in our greenhouse, growing in 7 cm pots filled with our carnivorous plant soil mix as a substrate
This is completely normal behavior and not a sign of illness. As soon as the days get longer again and you water more, the plant will automatically form its carnivorous summer leaves again.
Water
During the summer rosette phase, keep the soil consistently moist, preferably using the tray method (water in the saucer) so that the roots absorb what they need themselves.
As soon as the plant switches to its winter rosette, reduce watering: let the soil almost completely dry out between waterings. Too much water during this dormant phase is one of the most common causes of rot in the delicate, compact winter leaves.
Note: many of the easier species and hybrids sometimes produce carnivorous leaves all year round, and thus continue to grow even in winter.
Light & Humidity
Give your Pinguicula a bright location with indirect to filtered sunlight. An east-facing windowsill or a spot just out of reach of the harsh midday sun usually works best. Too little light results in flimsy, elongated rosettes with less color.
Average room humidity is sufficient for most species, although they appreciate slightly higher humidity during warm, dry summer days.
Temperature & Winter Dormancy
Ideally, keep the temperature between 10°C and 30°C. Unlike hardy European species, Mexican Pinguicula do not need a frost period to grow normally: they can be kept at room temperature all year round.
A slightly cooler and drier period in winter (around 12-15°C) does stimulate the formation of the compact winter rosette, but this is a physiological response to shorter days and less water, not to frost.
Soil & Substrate
Unlike most other carnivorous plants, Mexican Pinguicula do not require a purely acidic peat mixture. A well-draining, mineral-rich substrate gives the best results for the more specialized species.
- A mixture of perlite, coarse sand, and peat.
- Addition of other mineral components for species from calcareous habitats.
- Always good drainage to avoid stagnant water around the roots.
- For the most common and easy species on the market, our standard carnivorous plant soil mix is also suitable.
Check out our carnivorous plant supplies for ready-made mixes.
Propagation
Mexican Pinguicula can be propagated relatively easily via leaf cuttings: gently pull a healthy leaf from the rosette (including a small piece of the base) and place it on moist, mineral substrate. After a few weeks to months, small plantlets will develop at the base of the leaf. This works best with the winter leaves.
Easy Beginner Species
No experience with Mexican Pinguicula yet? The following species and hybrids are robust and forgiving:
P. cyclosecta, P. 'Aphrodite', P. 'Tina', P. 'Weser', P. moranensis.
Discover our Mexican Pinguicula
View all PinguiculaAre you unsure whether your Pinguicula is a Mexican or a hardy species, or do you want advice on the winter rosette? We are happy to help.
