Florida’s warm climate and long growing season support many weeds, but the right response depends on identifying the plant and knowing where it is growing. This guide covers common lawn and landscape weeds, shows how to inspect them, and explains practical control options. Before pulling or treating anything, check whether it may be a desirable native plant and confirm that any pesticide is labeled for the site and weed.
What You’ll Need
- Gardening gloves, closed-toe shoes, and a hand trowel or weeding tool.
- A phone or camera to photograph the whole plant, leaves, flowers, and seed heads.
- A lawn or landscape reference, such as your county UF/IFAS Extension office or its online weed identification resources.
- If considering herbicide: the product label, protective equipment listed on it, and a way to shield nearby plants from spray drift.
Step-by-Step
- Note where the plant is growing. Record whether it is in turf, a flower bed, a vegetable garden, a sidewalk crack, or a wet area. Identify the lawn grass if possible; a treatment safe for one turf type may injure another. Also note sun, shade, moisture, and whether the plant is spreading from a single point or forming a mat.
- Look at the whole plant before removing it. Photograph its growth habit, leaf arrangement, stems, flowers, and roots. Check whether leaves are broad or grasslike, whether stems creep along the ground, and whether the plant has thorns, milky sap, or seed heads. Avoid touching an unfamiliar plant with bare hands.
- Compare it with common Florida weeds. These examples are clues, not a substitute for a positive identification:
- Dollarweed (pennywort): Round, shiny leaves with the leaf stalk attached near the center. It commonly grows in damp, overwatered lawns.
- Virginia buttonweed: Opposite leaves on creeping stems, often with small white, four-petaled flowers. It can root at stem joints and spread through moist turf.
- Florida pusley: A low-growing broadleaf weed with small, hairy leaves and clusters of white flowers. It often forms mats in sunny lawns.
- Spurge: Several species grow flat against the ground, with small opposite leaves and branching stems. Many release milky sap when broken; avoid skin and eye contact.
- Crabgrass: A summer annual grass that spreads outward from a central point. Its stems may root at joints, and seed heads resemble several narrow fingers.
- Sedge, including yellow nutsedge: Upright, grasslike leaves with a triangular stem. The saying “sedges have edges” can help, but confirm the identification; ordinary lawn herbicides may not control sedges.
- Sandspur (sandbur): A grass with prickly seed burs that cling to shoes, clothing, and pet fur. Wear gloves and shoes when working near it.
- Chamberbitter: An upright summer annual with small leaves arranged in two rows and tiny seed capsules beneath them. It often appears in warm, disturbed beds and lawns.
- Confirm before choosing a control. Compare your photos with a reliable Florida-specific guide or ask your county Extension office. Common names can refer to different plants, and some weeds resemble beneficial native species. If you cannot identify it confidently, do not spray or compost it yet.
- Choose the least disruptive effective method. Pull small weeds when the soil is moist, removing the roots and any rooted stem joints. For established weeds, use a hoe or hand tool without damaging desirable roots. Remove seed heads before they mature and bag plants that have burrs or mature seed. Do not leave pulled weeds where fragments can re-root.
- Correct the conditions that favor the weed. In lawns, mow at the height recommended for the grass species, water deeply but only as needed, and avoid excessive fertilizer. Improve drainage where practical if a persistently wet lawn is encouraging moisture-loving weeds. In beds, maintain a suitable mulch layer while keeping mulch away from plant stems.
- Use herbicides only when appropriate. Select a product whose label lists the weed or suitable use site and your turf or landscape plant. Follow every label direction for rate, timing, protective gear, weather, and re-entry. Do not spray in wind, before rain if the label prohibits it, or near desirable plants without protection. Never mix products or increase the rate to try to make treatment work faster.
- Recheck the area. Inspect it weekly during active growth. Pull new seedlings early, watch for regrowth from roots or stem joints, and note whether the lawn is filling bare spots. Repeat a labeled treatment only when the label allows it; one application may not control perennial weeds or newly emerging seedlings.
Common Mistakes
- Guessing by appearance alone: Similar-looking weeds can need different controls, and some native plants are mistaken for weeds.
- Pulling only the top: Root fragments or rooted nodes can grow again, especially with creeping weeds.
- Using a broadleaf killer on grasslike weeds: Crabgrass and sedges are not controlled by every broadleaf herbicide. Check the label and identify the lawn grass first.
- Spraying during unsuitable conditions: Heat, wind, rain, or drought stress can reduce control or increase injury. Follow the product label’s conditions.
- Overwatering or scalping the lawn: Both can weaken turf and leave space for weeds. Set irrigation and mowing practices for the actual grass type.
- Ignoring seed or burrs: Mature seeds spread the problem; prickly sandspur burs can also injure people and pets.
Tips
- Take close-up photographs before pulling; flowers and seed heads are often the easiest identification clues.
- Work after rain or irrigation, when soil is easier to loosen, but avoid walking on saturated turf that can be damaged.
- Keep a simple record of the location, date, weed name, and control used. This helps reveal recurring trouble spots.
- Prevent bare patches by maintaining healthy turf or planting suitable ground cover. Dense, well-adapted plants make it harder for many weed seeds to establish.
- Ask a UF/IFAS Extension office for help with uncertain or persistent weeds. Include clear photos and the location where the plant is growing.
Troubleshooting
- The weed returns after pulling: Check for missed roots, underground parts, or stem joints that rooted. Remove the entire plant when soil is moist, then monitor for seedlings.
- A treatment did not work: Verify the weed and turf identification, product label, application timing, and weather conditions. Do not increase the dose. Contact Extension or a qualified lawn-care professional before trying another product.
- The lawn is yellowing or damaged: Stop further applications, check the product label for injury guidance, and keep people and pets away for the stated re-entry period. If damage is severe or the cause is unclear, seek local Extension advice.
- You find a thorny, irritating, or unfamiliar plant: Do not handle it barehanded. Photograph it from a safe distance and get an expert identification before removal or treatment.
- Weeds spread after control: Remove seed heads where safe, clean soil and seeds from tools, and inspect nearby beds and lawn edges. Address bare ground and irrigation problems that allow new plants to establish.
Frequently Asked Questions
What are the most common lawn weeds in Florida?
Dollarweed, Virginia buttonweed, Florida pusley, spurge, crabgrass, sedges, and chamberbitter are frequently encountered. Which ones dominate depends on the lawn grass, season, moisture, and location.
How can I tell a sedge from grass?
Sedges often have a triangular stem and leaves arranged in three directions; many grasses have round or flattened stems. Check more than one feature, because the saying “sedges have edges” is only a rule of thumb.
Is it better to pull weeds or use herbicide?
Hand removal is often practical for a few small weeds, especially before they set seed. Herbicides may be useful for widespread or persistent weeds, but only when the plant and site are identified and the label permits that use.
When should I treat weeds in Florida?
Timing varies by weed and product. Young, actively growing weeds are often easier to control, but follow the product label and local turf guidance; do not apply during prohibited weather or to stressed plants.
Can I put pulled weeds in my compost?
Only if they have no mature seeds, burrs, or persistent roots and your compost system gets hot enough to destroy them. When in doubt, bag them for disposal according to local rules.
Are Florida weeds harmful to pets?
Some plants have irritating sap, sharp burs, or other hazards, and plant risk varies by species. Prevent pets from eating unknown plants, remove prickly burs carefully, and contact a veterinarian or poison-control resource if exposure causes concern.