Cobweb Spiderwort or Tradescantia sillamontana, is a low growing perennial groundcover plant that is native to dry regions in Mexico. This easy to grow plant prefers partial shade but will tolerate full sun with good soil moisture. When located in an area that received full sun in the heat of the day, the leaves can burn.
It can grow in a range of soil and pH conditions, however, prefers well-drained acidic, loamy soils. Pinching the tips back will promote a more bushy habit. It can take on a trailing habit if the tips are not pinched.
They work wonderfully in containers, be sure to water regularly but do not overwater. Allow the soil to dry somewhat between watering. Overwatering, as well too much shade and excessive nitrogen can cause the plant to take on an unattractive appearance. Avoid overhead watering. After flowering, cutting back the plant will promote a second bloom, as well as preventing self-seeding.
Discontinue watering in the winter months.
Although considered a tropical perennial, it can also be grown as an annual in locations that are in cooler hardiness zones.
More sun and less water will lead to a plant that will be more silvery and compact.