pinkish-purple petals between July and September. When not flowering, it leaves out 4-inch long, sword-like, whorled blades. Its taproot produces over 30 stems at a time, encouraging matting growth.

Prune purple heart as it begins to grow long stems to prevent it from becoming ... though it can start flowering as early as spring and last into the fall, depending on where you live.

Learn about the connection between uncontrolled winter annual weeds and soybean cyst nematode and how to control these costly ...