The Quick Test
Look at the top leaves. If they’re triangular and purplish-red, it’s purple deadnettle. If the leaves are rounded with scalloped edges and clasp directly around the stem (no leaf stalk), it’s henbit. Both have square stems, pink-purple flowers, and bloom in early spring, which is why they’re constantly confused.
Does the Difference Matter?
Practically, no. Both are winter annuals that germinate in fall, flower in early spring, and die by late May. Both respond to the same broadleaf herbicides. Both are prevented by the same fall pre-emergent. The distinction is primarily academic, but knowing what’s in your lawn helps you sound like you know what you’re talking about.
