Weed With Little Purple Flowers

Weed With Little Purple Flowers: What’s Taking Over My Lawn?

If you’ve spotted tiny purple blooms sprinkled through your lawn or beds, you’re not alone. Every spring I get emails with photos of the same suspects: charming little flowers that look cute for a week… and then spread like a rumor. The good news? Once you know which purple-flowered weed you’re dealing with, you can choose the right strategy and take back your yard without breaking a sweat (or the soil).

“The trick isn’t to fight every weed. It’s to understand why it’s there, then make your lawn a place where weeds don’t want to live.”

Quick Clues To Identify That Purple-Flowered Weed

Fast ID Checklist

• Square stems when you roll them between your fingers? You’ve likely got a mint-family plant (henbit, purple deadnettle, ground ivy, self-heal, ajuga).
• Leaves that are heart-shaped and waxy? Wild violet is your guest (and it rarely asks permission).
• Plants blooming very early (late winter to early spring), then fading fast? Think henbit or purple deadnettle—winter annuals.
• Plants creeping low with runners in shade, minty smell when crushed? That’s creeping Charlie (ground ivy).
• Short “bottlebrush” purple flower spikes in a tidy clump? Self-heal (heal-all) is happily naturalizing.

Meet The Usual Suspects

Henbit (Lamium amplexicaule)

Those rosy-purple, tubular flowers sit on a square stem with rounded, scalloped leaves. Upper leaves clasp the stem (no little leaf stems), which is a big giveaway. It pops up in late winter, blooms early, and fades when heat arrives. It’s a winter annual, so it sprouts in fall, flowers in spring, and dies in summer—leaving seeds behind.

Control tip: Prevent fall germination with a broadleaf pre-emergent in late summer/early fall, and pull plants after rain before they seed.

Purple Deadnettle (Lamium purpureum)

Similar to henbit, but the top leaves look triangular and often blush purple. The leaves are fuzzy, and the plant stands a bit taller with a slightly pyramidal shape. Also a winter annual.

Control tip: Same as henbit—focus on prevention in fall and shallow hand-pulling in spring.

Creeping Charlie, a.k.a. Ground Ivy (Glechoma hederacea)

This one creeps like it owns the joint, rooting at the nodes along its stolons. Leaves are round with scalloped edges, opposite on the stem, and it releases a minty smell when crushed. Violet-blue to purple funnel-shaped flowers show in spring. It loves shade and thin turf.

Control tip: Thicken the lawn, improve light and drainage, and use a triclopyr-based selective herbicide in fall. A dethatching rake helps lift runners for easier removal. Skip the internet “borax cure”—it can damage your lawn.

Wild Violet (Viola sororia)

Heart-shaped, shiny leaves in clumps, with elegant purple (sometimes white or blue) flowers in spring. Beautiful, yes—but stubborn. Spreads by rhizomes and seeds (some form sly, self-pollinating flowers later in the season).

Control tip: Hand-dig with a weeding knife, chasing every rhizome you can. For big patches, fall applications of a selective herbicide containing triclopyr (often in combo with 2,4-D) are most effective. A few repeat treatments may be needed.

Self-Heal, a.k.a. Heal-All (Prunella vulgaris)

Low-growing, square stems with opposite leaves and short spikes of purple flowers that look like tiny snapdragons. It thrives in lawns that are mowed short and stays happy in moisture and part shade. Many pollinators adore it.

Control tip: Raise mowing height and reduce moisture; hand-weed or spot-treat if needed. I often let small patches bloom around trees—bees love it.

Ajuga, a.k.a. Bugleweed (Ajuga reptans)

Often an intentional groundcover that escapes its beds, ajuga has glossy, sometimes bronze-purple leaves and showy blue-purple flower spikes in spring. Spreads by shallow runners.

Control tip: Edge beds, dig out runners, and maintain a clean mulch line. In lawns, spot-weed or use selective controls for mints.

How To Control Purple-Flowered Weeds Without Losing Your Mind

Start With Smart Cultural Fixes

• Raise mowing height: Keep cool-season turf at 3–4 inches to shade the soil and crowd out seedlings.
• Feed lightly but consistently: Balanced nutrition helps grass outcompete weeds. Use a soil test to guide pH and fertilizer choices.
• Overseed thin spots: Especially in fall. A dense lawn is your best “herbicide.”
• Improve drainage and reduce compaction: Aerate compacted areas and topdress with compost.
• Water deeply, not daily: Aim for 1 inch per week in one or two soakings to drive deeper roots.
• Mulch garden beds: A 2–3 inch layer of clean mulch blocks light to winter annuals.

Mechanical And Organic Tactics That Work

• Hand-pull after rain: Roots release more easily from moist soil. A hori-hori knife is my favorite tool for violets and ground ivy runners.
• Dethatching rake: Fantastic for lifting creeping Charlie from the soil surface before bagging.
• Solarization: For badly infested beds, cover damp soil with clear plastic for 6–8 weeks in high summer to cook the seed bank.
• Smother and re-seed: In small lawn patches, smother with cardboard/mulch, then reseed with a dense turf mix in fall.
• Skip harsh home remedies: Vinegar and boiling water will burn foliage but rarely kill roots and can damage turf.

Selective Herbicides And Proper Timing

• Winter annuals (henbit, purple deadnettle): Apply a broadleaf pre-emergent such as isoxaben in late summer/early fall before germination. Spring post-emergent sprays help, but prevention is easier.
• Perennials (wild violet, creeping Charlie): Best controlled in fall with selective herbicides containing triclopyr. You may need 2–3 treatments spaced 2–3 weeks apart. Add a spreader-sticker (surfactant) for waxy violet leaves.
• Safety and pollinators: Avoid spraying when weeds are in full bloom or when bees are active. Spot-treat, and follow label directions to the letter.

Friends Or Foes? A Thought On Pollinators And Uses

While we call them weeds, many purple-flowered “volunteers” feed early pollinators when not much else is blooming. In tucked-away corners, I sometimes let henbit and self-heal flower, then mow before they set seed. Some are even edible: henbit, purple deadnettle, self-heal, and wild violet leaves/flowers are used in teas and salads. Always identify plants with certainty and never eat anything that’s been sprayed or grown near roads.

My Personal Playbook For A Cleaner Spring Lawn

• Late summer: Core aerate compacted areas, topdress with compost, and overseed. Apply a broadleaf pre-emergent where henbit/deadnettle are a problem (avoid pre-emergent if you’re overseeding that spot).
• Fall: Spot-spray creeping Charlie and wild violet with a triclopyr blend on a calm day around 60–75°F. Reapply in 2–3 weeks if needed.
• Early spring: Hand-pull winter annuals after rain. Raise mowing height to 3.5 inches. Feed lightly to push turf density.
• All season: Water deeply and infrequently, mow high, and keep beds mulched.

“If you only change one thing, raise your mowing height. Tall, healthy grass is like a living mulch that turns most weed problems into minor hiccups.”

Frequently Asked Questions

Will mowing get rid of these weeds?

Mowing knocks back flowers and prevents some seed set, but it won’t eliminate perennials or well-rooted annuals. Combine mowing with hand-pulling, overseeding, and (if needed) targeted herbicides.

Are these purple weeds harmful to pets?

Most are not highly toxic to dogs and cats, but any plant can cause stomach upset if eaten. Ground ivy can be harmful to grazing animals like horses. When in doubt, remove unwanted plants from pet play areas and consult your vet.

When should I use pre-emergent?

For winter annuals like henbit and deadnettle, apply in late summer to early fall before germination. For perennials like violets and creeping Charlie, pre-emergents don’t help—focus on fall post-emergent treatments and cultural fixes.

How do I tell henbit from purple deadnettle?

Henbit has rounder, scalloped leaves and the upper leaves clasp the stem. Purple deadnettle has triangular, fuzzy leaves, and the top leaves often turn a noticeable purplish color, giving the plant a tiered look.

Final Trowel-Thought

That weed with little purple flowers is telling you something about your yard—usually shade, thin turf, or compaction. Fix those, and you’ll see fewer purple surprises next spring. Until then, identify the culprit, choose a smart, targeted approach, and don’t forget: a healthy, high-mowed lawn is your best weed control. I’ve turned more than one patchy, purple-speckled yard into a lush green carpet with these exact steps. You can, too.