See more of the best plants for rock gardens here.
Rock Cress Care Must-Knows
Knowing that these plants hail from tough mountainous terrain, you can probably guess that their one major requirement is having well-drained soil. The fact that they are often found in some of the smallest cracks and even pure gravel gives you an idea of how sharply drained the soil needs to be for rock cress to thrive. This plant is extremely drought-tolerant and grows well in a container. Due to their rocky upbringings, these plants prefer alkaline soil. Be careful not to overwater or plant in a moist area because too much moisture is sure to kill them. Rock cress requires full sun. In less than full sun, blossoms will not be as bright or as plentiful. Full sun encourages the tightest habit, too. After their spectacular display of flowers, rock cress benefits from a shearing to stay nice and neat. If you leave spent blossoms on rock cress, there is a good chance it will reseed. Consider this a benefit because rock cress can be fairly short-lived as a perennial. Though they don’t tend to be invasive, you can control where you want more rock cress by sprinkling the seeds. In areas with warm, humid summers, rock cress may have a shorter life-span. Plant them in part-shade to increase the longevity. Use these plants for a no-fail trough garden.
