Plants from the genus grimmia typically prefer well-drained, rocky or sandy soils with a good level of acidity. They thrive in full to partial sunlight and require moderate watering, making sure the soil is not waterlogged. To plant grimmia, begin by preparing the site with appropriate soil amendments. Position the plants allowing enough space for growth. Initial care includes regular watering to establish the plants, while avoiding over-saturation. It's important to research the specific needs of the grimmia species you are planting, as requirements can vary.