Sow Outside: Cover seed. Start of spring - before the last light frost, or towards the end of autumn.
Sow Inside: Germination time: one to six weeks. Temperature: 70°F (21°C). Seven or eight weeks in advance. Transplant outdoors following the last frost. Space at 12 to 18 inches (30—45 cm).
Requirements and care: Partial shade, or full sun in cooler areas. Good drainage. Acidic soil pH 5 to 6. Fertile, moist soil. Regular watering. Deadhead to promote a second bloom. Tidy dead leaves and flowers. To maintain vigor, divide plants every three years. Propagate: by dividing in the spring in cooler areas or the autumn in warmer areas. Self-seeds freely.
Closely Related Species: Dayflower, Spiderwort.
Miscellaneous: Genus is named after the English naturalists John Tradescant the elder and the younger. May cause allergies in pets. Can grow aggressively in rich soils.
How to Grow Spiderwort and Other Tradescantia
The seeds of Tradescantia plants such as Trinity flower, Wandering jew, and Spiderwort can be sown outdoors in either autumn or in early spring. The seeds should be lightly covered once sown. Depending upon their size Tradescantia should be spaced from 30 to 45 cm apart. Ideally the soil that they grow in will be moist, rich, well drained and acidic (pH 5 to 6). The plants do best in a partially shaded are but will tolerate sunny areas as long as the soil is kept moist.
If starting plants indoors, then sow about seven weeks in advance. It should take from 10 days to 6 weeks for Tradescantia seeds to germinate at a temperature of about 20 degrees centigrade. Transplant them outdoors about a week after the last frost of spring.
Caring for Tradescantia Plants
It is easy to care for Tradescantia species. They like a moist soil so water regularly. Cutting back once they have flowered should result in a second bloom in the autumn.
To maintain vigorous growth, plants should be divided every three years. Cut back dead foliage.
If you require more plants then they can be propagated by division in the spring.
I hope that you enjoyed this guide on how to grow Tradescantia plants. You may also enjoy the following Gardener's HQ growing guides: How to grow Crocus and Setcreasea plants.