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Prowl H2O

CaroVail · Pendimethalin · EPA Reg 241-418 · Herbicide Document last checked 2026-05-30

About this product

Active ingredient Pendimethalin
Manufacturer CaroVail
Category Herbicide

Full details for Prowl H2O

Source product label ↗ Open the catalog source label while the local copy is reviewed. Verify the product name, EPA registration number, and revision before use. Source safety data sheet ↗ Open the catalog source SDS while the local copy is reviewed. Verify the exact product and revision before relying on it. EPA registration data Reg. 241-418 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 241-418 →

Prowl H2O is a selective herbicide containing 38.7% pendimethalin. It is used to control a wide variety of annual grasses and certain broadleaf weeds in various crops, including corn, soybeans, cotton, onions, and more. The product is formulated as an aqueous capsule suspension. It works by inhibiting meristematic plant cell division or mitosis, preventing germinating weed seeds from establishing. For application, it can be used as a preplant, preemergence, or postemergence herbicide via soil application methods such as broadcast, incorporation, or irrigation-based systems. When using this product, handlers must wear long-sleeved shirts, long pants, chemical-resistant gloves (barrier laminate, butyl, or nitrile), and shoes plus socks. It is critical to follow specific crop-specific directions and soil texture guidelines to avoid crop injury. Always avoid contact with eyes and skin, and do not reuse empty containers for any other purpose.

Pests covered (2)
annual grasses and certain broadleaf weedsAnnual Grasses, Barnyardgrass, Broadleaf Weeds, Chickweed, Crabgrass, Foxtail, Goosegrass, Grasses, Johnsongrass, Perennial Grasses, Purslane, Ryegrass, Spurge, Vines
Areas treatable (1)
Selected crops (e.g., corn, soybeans, cotton, onions, etc.)

Application instructions from the label 1

Selected crops (e.g., corn, soybeans, cotton, onions, etc.)

Check Table 1 for specific crop uses and Table 2 for specific weed control capabilities.

Target pest
annual grasses and certain broadleaf weeds
Location
Outdoor

Mixing instructions 1

Label notes
Refer to Table 3 and Table 4 for specific use rates and equivalencies in quarts or pints per acre.

Worker safety

Re-entry interval (REI) 24
PPE required Long-sleeved shirt and long pants; Chemical-resistant gloves (barrier laminate, butyl ≥ 14 mils, natural rubber ≥ 14 mils, neoprene rubber ≥ 14 mils, polyethylene rubber ≥ 14 mils, polyvinyl chloride ≥ 14 mils, or viton ≥ 14 mils); Shoes plus socks.

Timing & weather

Use restrictions 4