The plant often called the “purple spider plant” is Tradescantia pallida, known for its striking, deep purple foliage. It’s also commonly recognized as Purple Heart or Purple Inch Plant. Its vibrant color and relatively simple care make it a favored choice for adding unique color to indoor or outdoor spaces.
Unraveling the Name
The name “purple spider plant” often causes confusion with the true spider plant, Chlorophytum comosum. While both are popular houseplants, they are distinct species. Tradescantia pallida has rich, uniform purple leaves and a trailing habit, ideal for hanging baskets. In contrast, Chlorophytum comosum displays green or variegated leaves and produces “spiderettes” on arching stems, resembling spiders. This article focuses on the care of Tradescantia pallida.
Caring for Your Purple Heart Plant
Light
Tradescantia pallida thrives in bright, indirect light. Sufficient light is crucial for maintaining its vibrant purple coloration; without it, leaves may fade to a duller green. Direct afternoon sun can be too intense, potentially leading to leaf scorching. An east- or west-facing window typically provides ideal light exposure.
Watering
This plant prefers consistently moist soil but is highly susceptible to root rot if overwatered. Allow the top one to two inches of soil to dry out completely between waterings. Water thoroughly until it drains from the pot’s bottom, then discard any excess from the saucer. Adjust watering frequency based on environmental factors and season.
Soil
A well-draining potting mix is essential for Tradescantia pallida. A standard all-purpose potting mix works well. Enhancing drainage with perlite or coarse sand is beneficial, preventing waterlogging and root rot.
Temperature and Humidity
Tradescantia pallida prefers average room temperatures, ideally 60°F to 80°F (15°C to 27°C). It is sensitive to cold and should be protected from drafts or temperatures below 50°F (10°C). The plant appreciates moderate to high humidity, though it tolerates average household levels. A humidifier or pebble tray can help increase ambient humidity.
Fertilizing
During its active growing season (spring and summer), Tradescantia pallida benefits from regular fertilization. Apply a balanced liquid fertilizer at half strength every two to four weeks. Reduce or stop fertilizing during fall and winter when growth slows. Over-fertilization can lead to salt buildup, harming the plant.
Propagating Purple Heart Plants
Propagating Tradescantia pallida is straightforward, as stem cuttings root readily. To propagate, take a four to six-inch cutting from a healthy stem, ensuring it has several leaf nodes. Remove leaves from the bottom two inches to expose the nodes.
Cuttings can be placed directly into water, where roots typically emerge within a week or two. Alternatively, plant cuttings directly into a well-draining potting mix, keeping the soil moist until new growth indicates rooting.
Troubleshooting Common Issues
Fading Color
If your Tradescantia pallida’s vibrant purple color fades, it often indicates insufficient light. Moving the plant to brighter, indirect light will typically restore its deep hue. Consistent light is crucial for pigment development.
Leggy Growth
Stretching or “leggy” growth, with elongated stems and sparse leaves, signals inadequate light. Providing brighter conditions and pruning leggy sections encourages bushier, more compact growth. Regular pruning also helps maintain a desirable shape.
Drooping Leaves
Drooping leaves can signal either underwatering or overwatering, requiring careful soil moisture assessment. If the soil is excessively dry, the plant needs thorough watering. If consistently soggy, drooping leaves may indicate root rot from overwatering; allow the soil to dry more between waterings.