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Preen Garden Weed Preventer Plus Plant Food

Product Support

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Description

Preen Garden Weed Preventer Plus Plant Food works all season long!

Unlike other weed killers and plant foods, one easy application prevents weeds up to 3 months and feeds your plants for beautiful color, foliage and strong roots to help avoid insects and disease.

This product can be used anytime during the spring, summer, or fall in flower and ornamental garden beds, around ground covers, trees, and shrubs. Although this product will not kill existing weeds, it will prevent new weeds from sprouting – eliminating the need for difficult and time-consuming hand weeding. There is no chance of overfeeding or burning your plants when used as directed. 

Without weeds, your valuable plants can grow larger and stronger. Your beds will stay neat and weed-free all season long! 

Application

How to Apply

When plants are dry, sprinkle this product on soil surface, and immediately water to activate. It forms a weed control barrier in the top layer of soil, preventing weed seeds from germinating. Disturbance to the soil surface after activation may result in erratic weed control.

When to Apply

Apply Preen Garden Weed Preventer Plus Plant Food anytime in the spring, summer, or fall around established plants and transplants. It should not be used on flower seeds. In can be used after flowering plants have germinated and are 2-3 inches tall. Since it does not kill existing weeds, you must first remove any that have already begun to grow.

Rain does not wash this product out of the soil. For optimum weed control and plant feeding, reapply this product every 3 months.

Applying Around Established and Transplanted Plants

For flowers, roses, herbs, ground covers, ornamental grasses, shrubs, trees, and listed vegetables at least 2-3 inches tall, sprinkle Preen Garden Weed Preventer Plus Plant Food evenly over the entire soil surface. Immediately water this product into soil surface. If watering-in is not convenient, lightly rake into soil surface. Always wash or brush off stray granules from plant foliage.

Applying with Mulch

For best weed control, we recommend applying Preen Garden Weed Preventer Plus Plant Food after spreading mulch on your flower and shrub beds. Sprinkle it on top of mulch. Immediately water this product into the mulch. If watering-in is not convenient, lightly rake into top layer of mulch. Always wash or brush off stray granules from plant foliage.

This is not the product label. Always read and follow directions on the product label. Use only as directed.

FAQ

Coupons

Do you offer coupons, rebates, etc?

We, as the manufacturer of Preen, do not offer any coupons or rebates. However, very often our retailers or mass merchants offer their own special sale price, coupons or rebates. Local flyers, newspaper inserts and media advertising can alert you to these offers.

General Product Questions

How does Preen® Garden Weed Preventer Plus Plant Food work?

Preen® Garden Weed Preventer Plus Plant Food creates a barrier that inhibits weed seed growth. The barrier lasts up to 12 weeks.

How long does Preen® Garden Weed Preventer Plus Plant Food stay in the soil?

Approximately 8 – 12 weeks per application. The rate at which Preen® Garden Weed Preventer Plus Plant Food biodegrades will depend on temperature, soil type, rain/moisture, sunlight and amount applied.

I have Preen 'n Green® For Gardens/Preen® Garden Weed Preventer Plus Fertilizer/Preen® Garden Weed Preventer With Brilliant Blooms Fertilizer/Preen® Garden Weed Preventer Plus Plant Food. Are these products the same?

Not exactly. Each product contains the same weed preventing active ingredient, Trifluralin. However, the percentage of active ingredient and the fertilizer plant food analysis may be different. Please refer to your plant label for the active ingredient percentage and fertilizer/plant food analysis information.

What are the other ingredients in Preen® Garden Weed Preventer Plus Plant Food?

Preen® Garden Weed Preventer Plus Plant Food also contains a carrier agent such as corn cob or attaclay, as well as fertilizer.

What are the particles on the soil surface after I watered Preen® Garden Weed Preventer Plus Plant Food?

They are a carrier agent, such as corncob, and will biodegrade over time.

What does “established plant” mean on the Preen® Garden Weed Preventer Plus Plant Food label?

The term “established plant” refers to flowers, trees and shrubs at least 3″ in height, not recently transplanted and having a strong root system. An established groundcover is one not recently planted and that has spread or filled in to your satisfaction. (Note: Groundcovers will not spread while Preen® Garden Weed Preventer Plus Plant Food is active, about 8–12 weeks).

What does “non-bearing fruit and nut trees” mean?

The term “non-bearing fruit and nut trees” refers to established fruit and nut trees that are not presently bearing fruit or nuts. Preen® Garden Weed Preventer Plus Plant Food can be applied around the label listed non-bearing fruit and nut trees until they begin bearing fruit or nuts; otherwise, Preen® Garden Weed Preventer Plus Plant Food cannot be applied.

What is the active ingredient in Preen® Garden Weed Preventer Plus Plant Food?

1.47% Trifluralin (Treflan).

What weed seeds does Preen® Garden Weed Preventer Plus Plant Food prevent from germinating?

See our list of weeds controlled or the product label.

What weeds does Preen® Garden Weed Preventer Plus Plant Food kill?

None; Preen® Garden Weed Preventer Plus Plant Food helps to prevent its label listed weed seeds from germinating up to 12 weeks per application. It does not kill or inhibit existing weeds in any way.

When can people and pets enter an area that was treated with Preen® Garden Weed Preventer Plus Plant Food?

They may enter the treated area after it is thoroughly dry from the first rain and/or watering.

Why is the Preen® Garden Weed Preventer Plus Plant Food container not full?

Preen® Garden Weed Preventer Plus Plant Food is packaged/sold by weight not by volume; if you weigh the container you will find that the weight is as stated or slightly higher.

Will rain wash Preen® Garden Weed Preventer Plus Plant Food away?

No, but heavy rain may shorten its effective period.

Do you have a guarantee on your products?

Preen® Guarantee: To the extent consistent with applicable law, Lebanon Seaboard Corporation guarantees you will be satisfied with the performance of Preen® products when used as directed, or your money back. If not satisfied, describe the nature of your problem, and send with proof of purchase to:

Lebanon Seaboard Corporation
1600 East Cumberland St.
Lebanon, PA 17042

Proper Use

Can I mix Preen® Garden Weed Preventer Plus Plant Food with water before application?

No; mixing with water dilutes the active ingredient and renders Preen® Garden Weed Preventer Plus Plant Food ineffective.

Can I walk on a Preen® Garden Weed Preventer Plus Plant Food treated area?

Avoid walking on a treated area; any disturbance will result in erratic weed prevention.

Can Preen® Garden Weed Preventer Plus Plant Food be applied on plant foliage or plant roots?

No; plant injury could result.

Can Preen® Garden Weed Preventer Plus Plant Food be applied when plant foliage is wet?

No; plant injury could result.

Can Preen® Garden Weed Preventer Plus Plant Food Plus Plant Food be applied when the garden soil is wet?

No; uneven coverage and erratic label listed weed seed prevention could result.

Do I apply Preen® Garden Weed Preventer Plus Plant Food by hand?

No; apply with either the refillable shaker canister, the scoop included in some Preen® Garden Weed Preventer Plus Plant Food packaging, your garden scoop, or a make shift applicator.

Do I have to weed first before applying Preen® Garden Weed Preventer Plus Plant Food?

Yes; Preen® Garden Weed Preventer Plus Plant Food does not kill existing weeds, so you must hand-pull existing weeds first. Note that Preen® Garden Weed Preventer Plus Plant Food will not control weeds that are tilled under.

Does Preen® Garden Weed Preventer Plus Plant Food control weeds that are tilled under?

No; weeds that are not completely removed will emerge again.

Does Preen® Garden Weed Preventer Plus Plant Food need to be watered-in?

Yes; rain or water must immediately follow application to activate Preen® Garden Weed Preventer Plus Plant Food.

How close can I apply Preen® Garden Weed Preventer Plus Plant Food to a non-recommended plant?

Apply Preen® Garden Weed Preventer Plus Plant Food at least 12″ outside the drip-line from a non-recommended plant. [NOTE: Consumer assumes liability for any plant damage resulting from the use of Preen® around plant species not recommended on the label.]

How do you use Preen® Garden Weed Preventer Plus Plant Food with flowers, shrubs, and trees?

Ensure the flowers, shrubs and trees are listed on the label. Remove existing weeds and weed roots. Then, apply Preen® Garden Weed Preventer Plus Plant Food and water thoroughly.

How do you use Preen® Garden Weed Preventer Plus Plant Food with groundcovers?

Ensure your groundcovers are fully established, have spread to your satisfaction and are listed on the label. Remove existing weeds and weed roots. Then, apply Preen® Garden Weed Preventer Plus Plant Food around the dry foliage. Water thoroughly.

How long does Preen® Garden Weed Preventer Plus Plant Food prevent weed seeds from germinating?

Up to 12 weeks per application. Reapplication may be necessary sooner if heavy rain occurs.

How much Preen® Garden Weed Preventer Plus Plant Food should I apply?

For label-recommended established flowers, shrubs, trees, and groundcovers, apply at a rate of 1 ounce per 10 square feet. For label-recommended vegetables, apply 1 pound per 640 square feet. For heavy clay or medium loam (roughly equal parts sand, silt, clay) soils, apply 1 pound per 960 square feet, and apply 1 pound per 1,280 square feet for light sandy soils.

What happens if rain or water does not immediately occur after application?

Preen® Garden Weed Preventer Plus Plant Food will not start to work until rain or watering occurs. If watering is not an option, time your application with rain. Lightly rake Preen® Garden Weed Preventer Plus Plant Food into the soil surface to protect it from sunlight until rain occurs.

When do I apply Preen® Garden Weed Preventer Plus Plant Food with bulbs?

Apply on dry, weed-free garden soil when any of the label-recommended bulb plants are at least 3″ tall. Water immediately after application.

When do I apply Preen® Garden Weed Preventer Plus Plant Food?

Anytime during the growing season when the ground temperature is at least 50–55 degrees.

When do I reapply Preen® Garden Weed Preventer Plus Plant Food?

Reapply every 8 – 12 weeks in the growing season.

Why can't I apply Preen® Garden Weed Preventer Plus Plant Food to muck soil or soils containing more than 10% organic matter?

These types of soils will neutralize the active ingredient in Preen® Garden Weed Preventer Plus Plant Food.

Staining

Can Preen® Garden Weed Preventer Plus Plant Food stain?

Yes; Preen® Garden Weed Preventer Plus Plant Food can stain porous surfaces such as concrete, rocks, bricks, landscape blocks, shoes, leather and linoleum.

How can I get rid of a Preen® Garden Weed Preventer Plus Plant Food stain?

Try Goo Gone® or another citrus-based cleaning product to lessen the appearance of or remove a stain. Always test a small area first to ensure the product won't cause additional staining. For porous surfaces: Use equal parts soapy water and bleach, or a paste of baking soda and water, or ultraviolet light/sunlight, or a citrus-based cleaner, or 409 carpet foaming spray cleaner. Always follow manufacturer's directions. For non-porous, uncoated surfaces: Use acetone or an acetone based nail polish remover.

How do I prevent possible staining?

Before watering Preen® Garden Weed Preventer Plus Plant Food, dry brush stray granules off non target surfaces. Store Preen® Garden Weed Preventer Plus Plant Food packages in a garage or shed on top of cardboard or newspaper.

Storage & Safety

Can Preen® Garden Weed Preventer Plus Plant Food be stored for next year?

Yes. Store in a dry place away from sunlight and moisture, atop a piece of cardboard or an old newspaper.

Does Preen® Garden Weed Preventer Plus Plant Food expire?

No; Preen® Garden Weed Preventer Plus Plant Food has an indefinite shelf-life as long as it's sheltered from moisture and sunlight.

How do I dispose of Preen® Garden Weed Preventer Plus Plant Food or its empty container?

Call your local municipality to inquire on proper product disposal and/or package recycling, or call 1-800-CLEANUP. If not recyclable and container is empty, place empty container in trash.

Preen® Garden Weed Preventer Plus Plant Food was over-applied in my garden. How can I save my plants from injury?

If rain or watering did not occur: Physically remove Preen® Garden Weed Preventer Plus Plant Food.

If rain or watering did occur, or if you were unable to physically remove Preen® Garden Weed Preventer Plus Plant Food, neutralize Preen® Garden Weed Preventer Plus Plant Food following these steps.

The active ingredient should be neutralized using activated charcoal granules. Activated charcoal can be found at garden centers, pool supply stores, pet stores, or in the aquarium supply section of stores. Call the store first to confirm availability. Charcoal bricks used in a grill will not work.

  1. Sprinkle activated charcoal granules onto the soil surface at a rate of one pound per 100 square feet.
  2. Gently rake the activated charcoal into surface of soil.
  3. Thoroughly water the activated charcoal treated area.
  4. Repeat the watering schedule for three days.
  5. Cease watering and wait two days. After two days, the active ingredient in the product will be neutralized.
Preen® Garden Weed Preventer Plus Plant Food was over-applied in my garden. Is there any risk?

Yes; injury may occur to plants.

What can I do if I applied Preen® Garden Weed Preventer Plus Plant Food to my lawn, grass or flower seeds, a non-recommended plant, etc.?

The active ingredient should be neutralized using activated charcoal granules. Activated charcoal can be found at garden centers, pool supply stores, pet stores, or in the aquarium supply section of stores. Call the store first to confirm availability. Charcoal bricks used in a grill will not work.

  1. Sprinkle activated charcoal granules onto the soil surface at a rate of one pound per 100 square feet.
  2. Gently rake the activated charcoal into surface of soil.
  3. Thoroughly water the activated charcoal treated area.
  4. Repeat the watering schedule for three days.
  5. Cease watering and wait two days. After two days, the active ingredient in the product will be neutralized.
What do I do if Preen® Garden Weed Preventer Plus Plant Food accidentally got on plant foliage during application?

Before watering, gently and immediately dry-brush Preen® Garden Weed Preventer Plus Plant Food off plant foliage.

Where can I find emergency medical information for Preen® Garden Weed Preventer Plus Plant Food?

Immediately call Prosar Corporation toll-free at (888) 208-1368 and/or 911.

Use with Seeds and Young Plants

How long after an application of Preen® Garden Weed Preventer Plus Plant Food should I wait before planting new seed or transplanting?

Wait 12 weeks from when Preen® Garden Weed Preventer Plus Plant Food was applied.

Will flower seeds germinate with Preen® Garden Weed Preventer Plus Plant Food?

Flower seeds will not germinate or reseed while Preen® Garden Weed Preventer Plus Plant Food is active (about 12 weeks per application).

Use Around Vegetables

How do I apply Preen® Garden Weed Preventer Plus Plant Food with vegetables?

Ensure the vegetable plants are listed on the label. Remove existing weeds and weed roots. Then, apply Preen® Garden Weed Preventer Plus Plant Food and water thoroughly.

Use with Mulch

Can I apply Preen® Garden Weed Preventer Plus Plant Food before mulching?

Yes, after removing existing weeds and weed roots. Then, apply Preen® Garden Weed Preventer Plus Plant Food and water thoroughly.

Can Preen® Garden Weed Preventer Plus Plant Food be applied on top of mulch?

Yes. After removing existing weeds and weed roots, rake the mulch to loosen it, and ensure the mulch is 2–3″ thick. Then, apply Preen® Garden Weed Preventer Plus Plant Food and water thoroughly.

Where to Apply Preen

Can I apply between bricks or patio blocks, on pebbles or on other hard surfaces?

No; Preen® Garden Weed Preventer Plus Plant Food will stain porous surfaces such as brick, patio blocks, stones, etc.

Can I use Preen® Garden Weed Preventer Plus Plant Food around, under, or near a swimming pool, sandbox, playground type areas, or under bird feeders?

No.

Can I use Preen® Garden Weed Preventer Plus Plant Food in or near a greenhouse or any type of enclosed area?

No; staining and/or volitization could occur causing plant injury.

Can I use Preen® Garden Weed Preventer Plus Plant Food in or near a pond, lake, or other type of waterway?

No; Preen® Garden Weed Preventer Plus Plant Food is harmful to aquatic life.

Can I use Preen® Garden Weed Preventer Plus Plant Food on a garden slope or hillside?

Yes, if a waterway is not at the bottom of the slope or hillside.

Can I use Preen® Garden Weed Preventer Plus Plant Food on my lawn or with grass seed or sod?

No; turf injury could result. Preen® Garden Weed Preventer Plus Plant Food is not labeled for use on lawns.

Can I use Preen® Garden Weed Preventer Plus Plant Food where chickens, horses or other animals graze?

No.

Can I use Preen® Garden Weed Preventer Plus Plant Food with a plant that is not listed in the recommended established plant section?

Yes, but use caution. Make a trial application of Preen at the recommended rate around one or two plants. Observe the plants for 30 to 60 days. If plant injury results, do not use Preen around other plants of the same species. [NOTE: Consumer assumes liability for any plant damage resulting from the use of Preen around plant species not recommended on the label.]

Can Preen® Garden Weed Preventer Plus Plant Food be applied around corn?

No; Preen® Garden Weed Preventer Plus Plant Food is not labeled for use on corn.

Can Preen® Garden Weed Preventer Plus Plant Food be applied to strawberries?

No; Preen® Garden Weed Preventer Plus Plant Food is not labeled for use on strawberries.

Can Preen® Garden Weed Preventer Plus Plant Food be used in potted plants or planter boxes?

No; plant injury could result.

What plants are recommended with Preen® Garden Weed Preventer Plus Plant Food?

See our plant compatibility tool or the product label.

Where to Buy Preen

Can I order Preen® Garden Weed Preventer Plus Plant Food on your website?

No, but the product is available at most home and garden centers. Use our store locator to find a retailer near you.

Is Preen® Garden Weed Preventer Plus Plant Food available outside of the United States?

No; Preen® Garden Weed Preventer Plus Plant Food is not available or registered outside of the United States.

Available Sizes