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Preen Garden Weed Preventer - 5.625 lb

SKU: 689867
UPC: 088685637933
$21.99
  • Prevents new weeds from sprouting for up to 3 months with one application.
  • Safe for use around over 200 established flowers, vegetables, trees, and shrubs.
  • Convenient flip-top shaker bottle makes application fast and accurate.
  • Covers up to 900 sq. ft., ideal for flower beds, ground covers, and mulched areas.

Preen Garden Weed Preventer (5.625 lb) provides long-lasting, guaranteed protection against unwanted weeds by stopping them before they ever emerge. Formulated with trifluralin, this granular pre-emergent herbicide creates an invisible barrier in the soil that prevents weed seeds from germinating for up to three months. Safe for use around hundreds of established plants, Preen is perfect for flower beds, vegetable gardens, ground covers, trees, and shrubs. Its easy-to-use shaker bottle allows quick application across soil or mulch, making it simple to maintain weed‑free beds throughout the growing season without hand‑weeding. Apply anytime—spring, summer, or fall—for season‑long garden protection.


Key Benefits

Stops weeds before they sprout; delivers continuous protection up to 3 months; reduces or eliminates hand‑weeding; easy-to-use flip-top applicator; safe for established ornamentals and listed vegetables.

Where to Use

Use in flower beds, vegetable gardens (around listed edibles), ground covers, around trees and shrubs, and mulched landscapes. Not for use on lawns.

How It Works

Granules create a protective barrier in the top layer of soil that prevents weed seeds from germinating. Preen does not kill existing weeds—remove them before applying.

Application Instructions

Remove existing weeds before application.
Apply evenly over dry soil or mulch using the shaker bottle.
Rake lightly to integrate into the top layer of soil or mulch.
Water thoroughly to activate the protective barrier.
Reapply every 9–12 weeks for continuous protection.

Active Ingredient

Trifluralin (pre-emergent herbicide).

Coverage

5.625 lb bottle covers up to 900 sq. ft.

When to Apply

Apply any time during the growing season—spring, summer, or fall—as long as plants are established. Do not use on flower seeds; wait until seedlings are 2–3 inches tall.

Plant Compatibility

Safe around more than 200 established flowers, trees, vegetables, herbs, and shrubs (refer to product label for full list). Avoid direct contact with plant roots and foliage during application.

Limitations

Not for use on lawns. Does not kill existing weeds. Soil disturbance after activation can reduce effectiveness.

Label.pdf

Safety Data Sheet.pdf

Want to learn more? Check out our related GrangeKnows articles

WARNING: This product can expose you to chemicals including Trifluralin, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov

 
  • Prevents new weeds from sprouting for up to 3 months with one application.
  • Safe for use around over 200 established flowers, vegetables, trees, and shrubs.
  • Convenient flip-top shaker bottle makes application fast and accurate.
  • Covers up to 900 sq. ft., ideal for flower beds, ground covers, and mulched areas.

Preen Garden Weed Preventer (5.625 lb) provides long-lasting, guaranteed protection against unwanted weeds by stopping them before they ever emerge. Formulated with trifluralin, this granular pre-emergent herbicide creates an invisible barrier in the soil that prevents weed seeds from germinating for up to three months. Safe for use around hundreds of established plants, Preen is perfect for flower beds, vegetable gardens, ground covers, trees, and shrubs. Its easy-to-use shaker bottle allows quick application across soil or mulch, making it simple to maintain weed‑free beds throughout the growing season without hand‑weeding. Apply anytime—spring, summer, or fall—for season‑long garden protection.


Key Benefits

Stops weeds before they sprout; delivers continuous protection up to 3 months; reduces or eliminates hand‑weeding; easy-to-use flip-top applicator; safe for established ornamentals and listed vegetables.

Where to Use

Use in flower beds, vegetable gardens (around listed edibles), ground covers, around trees and shrubs, and mulched landscapes. Not for use on lawns.

How It Works

Granules create a protective barrier in the top layer of soil that prevents weed seeds from germinating. Preen does not kill existing weeds—remove them before applying.

Application Instructions

Remove existing weeds before application.
Apply evenly over dry soil or mulch using the shaker bottle.
Rake lightly to integrate into the top layer of soil or mulch.
Water thoroughly to activate the protective barrier.
Reapply every 9–12 weeks for continuous protection.

Active Ingredient

Trifluralin (pre-emergent herbicide).

Coverage

5.625 lb bottle covers up to 900 sq. ft.

When to Apply

Apply any time during the growing season—spring, summer, or fall—as long as plants are established. Do not use on flower seeds; wait until seedlings are 2–3 inches tall.

Plant Compatibility

Safe around more than 200 established flowers, trees, vegetables, herbs, and shrubs (refer to product label for full list). Avoid direct contact with plant roots and foliage during application.

Limitations

Not for use on lawns. Does not kill existing weeds. Soil disturbance after activation can reduce effectiveness.

Label.pdf

Safety Data Sheet.pdf

Want to learn more? Check out our related GrangeKnows articles

WARNING: This product can expose you to chemicals including Trifluralin, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov