Preen Weed Preventer for Southern Gardens
Description
Preen Weed Preventer inhibits most weeds from germinating for up to 4 months in flower beds, and 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.
Without weeds, your valuable plants can grow larger and stronger and your beds will stay neat and weed-free all season long!
Application
When to Apply
Apply Preen Weed Preventer anytime during the growing season only around established plants. It should not be used on flower seeds, but may 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.
By applying Preen Weed Preventer as early as possible, however, you may eliminate the need for hand weeding. For the maximum in plant maintenance, reapply every 4 months.
Applying Around Established and Transplanted Plants
For flowers, roses, herbs, ground covers, ornamental grasses, shrubs, and trees, sprinkle Preen Weed Preventer evenly over the entire soil surface, then water the weed preventer into the soil’s surface. Always wash or brush off stray granules from plant foliage.
Applying with Mulch
For best weed control, we recommend applying Preen Weed Preventer after spreading mulch on your flower and shrub beds. Sprinkle Preen Weed Preventer on top of mulch at surface rate, then water into the mulch to activate.
This is not the product label. Always read and follow directions on the product label. Use only as directed.
FAQ
- Coupons
- General Product Questions
- Proper Use
- Staining
- Storage & Safety
- Use with Seeds and Young Plants
- Use Around Vegetables
- Use with Mulch
- Where to Apply Preen
- Where to Buy Preen
Coupons
- Do you offer coupons, rebates, etc?
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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
- What is the active ingredient in Preen® Weed Preventer for Southern Gardens?
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0.27% Dithiopyr (Dimension).
- What are the other ingredients in Preen® Weed Preventer for Southern Gardens?
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Preen® Weed Preventer for Southern Gardens also contains a carrier agent such as corn cob or attaclay.
- What does “Southern Gardens” on the Preen® Weed Preventer for Southern Gardens label mean?
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The term “Southern Gardens” refers to gardens that grow in climates with longer warm seasons than the north, especially Plant Hardiness zones 7-10.
- What weed seeds does Preen® Weed Preventer for Southern Gardens prevent from germinating?
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See our list of weeds controlled or the product label.
- How long does Preen® Weed Preventer for Southern Gardens prevent its label listed weed seeds from germinating?
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Up to 4 months per application. Reapplication may be necessary sooner if heavy rain occurs.
- How long does Preen® Weed Preventer for Southern Gardens last in the soil?
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Up to 4 months per application. The rate at which Preen Garden Weed Preventer biodegrades will depend on temperature, soil type, rain/moisture, sunlight and amount applied.
- What weeds does Preen® Weed Preventer for Southern Gardens kill?
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None; Preen® Weed Preventer for Southern Gardens helps to prevent its label listed weed seeds from germinating up to 4 months per application. It does not kill or inhibit existing weeds in any way.
- What does “established plant” mean on the Preen® Weed Preventer for Southern Gardens label?
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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® Weed Preventer for Southern Gardens is active, about 12–16 weeks).
- What does “non-bearing fruit and nut trees” mean?
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The term “non-bearing fruit and nut trees” refers to established fruit and nut trees that are not presently bearing fruit or nuts. Preen® Weed Preventer for Southern Gardens cannot be applied around fruit and nut trees.
- What are the particles on the soil surface after I watered Preen® Weed Preventer for Southern Gardens?
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They are a carrier agent, such as corncob, and will biodegrade over time.
- Can I walk on a Preen® Weed Preventer for Southern Gardens treated area?
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Avoid walking on a treated area; any disturbance will result in erratic weed prevention.
- How does Preen® Weed Preventer for Southern Gardens work?
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Preen Garden Weed Preventer creates a barrier that inhibits weed seed growth. The barrier lasts up to 4 months.
- Will rain wash Preen® Weed Preventer for Southern Gardens away?
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No, but heavy rains may shorten its effective period.
- Why is the Preen® Weed Preventer for Southern Gardens container not full?
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Preen® Weed Preventer for Southern Gardens 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.
- I have Preen Garden Weed Preventer. Is that the same as Preen Weed Preventer For Southern Gardens?
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No; they have different active ingredients, different compatible plant lists, different weed seeds controlled lists, and different active periods.
Proper Use
- When do I apply Preen® Weed Preventer for Southern Gardens?
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Anytime during the growing season when the ground temperture is at least 50–55 degrees.
- Do I have to weed first before applying Preen® Weed Preventer for Southern Gardens?
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Yes; Preen® Weed Preventer for Southern Gardens does not kill existing weeds, so you must hand-pull existing weeds first. Note that Preen® Weed Preventer for Southern Gardens will not control weeds that are tilled under.
- When do I reapply Preen® Weed Preventer for Southern Gardens?
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Reapply every 4 months in the growing season for continued label listed weed seed prevention.
- Can Preen® Weed Preventer for Southern Gardens be applied when plant foliage is wet?
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No; as plant injury could result.
- Must Preen® Weed Preventer for Southern Gardens be watered-in?
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Yes; rain or water must immediately follow application to activate Preen® Weed Preventer for Southern Gardens.
- What happens if rain or water does not immediately occur after application?
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Preen® Weed Preventer for Southern Gardens will not start to work until rain or watering occurs. If watering is not an option, time your application with rain. Lightly rake Preen® Weed Preventer for Southern Gardens into the soil surface to protect it from sunlight until rain occurs.
- How much Preen® Weed Preventer for Southern Gardens do I apply?
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Apply at a rate of 0.68 ounces per 10 square feet per application, and no more than 4.25 pounds per 1,000 square feet. In the state of New York (excluding Nassau and Suffolk counties), do not apply more than 4.25 pounds per 1,000 square feet per year; do not apply this product in Nassau and Suffolk counties of New York.
- Can Preen® Weed Preventer for Southern Gardens be applied on plant foliage or plant roots?
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No; plant injury could result.
- What do I do if Preen® Weed Preventer for Southern Gardens accidentally got on plant foliage during application?
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Before watering, immediately dry-brush Preen® Weed Preventer for Southern Gardens gently off plant foliage.
- How do you use Preen® Weed Preventer for Southern Gardens with established flowers, shrubs, and trees?
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Ensure the flowers, shrubs and trees are listed on the label. Remove existing weeds and weed roots. Then, apply Preen® Weed Preventer for Southern Gardens and water thoroughly.
- When do I apply Preen® Weed Preventer for Southern Gardens with bulbs?
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Apply on dry weed-free garden soil when any of the label recommended bulb plants are at least 3″ in height out of the soil. Water immediately after application.
- How do you use Preen® Weed Preventer for Southern Gardens with groundcovers?
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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 around the dry foliage. Water thoroughly.
- Does Preen® Weed Preventer for Southern Gardens control weeds that are tilled under?
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No; weeds that are not completely removed will emerge again.
- Do I apply Preen® Weed Preventer for Southern Gardens by hand?
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No; apply with either the refillable shaker canister, the scoop included in some Preen® Weed Preventer for Southern Gardens packaging, your garden scoop, or a make shift applicator.
- Can I mix Preen® Weed Preventer for Southern Gardens with water before application?
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No; mixing with water dilutes the active ingredient and renders Preen® Weed Preventer for Southern Gardens ineffective.
Staining
- Can Preen® Weed Preventer for Southern Gardens stain?
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Yes; Preen® Weed Preventer for Southern Gardens can stain porous surfaces such as concrete, rocks, bricks, landscape blocks, shoes, leather and linoleum.
- How do I prevent possible staining?
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Before watering Preen® Weed Preventer for Southern Gardens, dry brush stray granules off nontarget surfaces. Store Preen® Weed Preventer for Southern Gardens packages in a garage or shed on top of cardboard or newspaper.
- How can I get rid of a Preen® Weed Preventer for Southern Gardens stain?
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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.
Storage & Safety
- Where can I find emergency medical information for Preen® Weed Preventer for Southern Gardens?
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Immediately call Prosar Corporation toll-free at (888) 208-1368 and/or 911.
- When can people and pets enter an area that was treated with Preen® Weed Preventer for Southern Gardens
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After the treated area is thoroughly dry from the first rain or watering.
- How do I dispose of Preen® Weed Preventer for Southern Gardens or its empty container?
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Call your local municipality to inquire on proper product disposal and/or package recycling, or call 1-800-CLEANUP. If not recycleable and container is empty, place empty container in trash.
- What can I do if I applied Preen® Weed Preventer for Southern Gardens to my lawn, grass or flower seeds, a non-recommended plant, etc.?
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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.
- Sprinkle activated charcoal granules onto the soil surface at a rate of one pound per 100 square feet.
- Gently rake the activated charcoal into surface of soil.
- Thoroughly water the activated charcoal treated area.
- Repeat the watering schedule for three days.
- Cease watering and wait two days. After two days, the active ingredient in the product will be neutralized.
- What happens if Preen® Weed Preventer for Southern Gardens was over-applied?
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Injury may occur to plants.
- Preen® Weed Preventer for Southern Gardens was over-applied in my garden. How can I save my plants from injury?
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If rain or watering did not occur: Physically remove Preen® Weed Preventer for Southern Gardens.
If rain or watering did occur, or if you were unable to physically remove Preen® Weed Preventer for Southern Gardens., neutralize Preen® Weed Preventer for Southern Gardens. 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.
- Sprinkle activated charcoal granules onto the soil surface at a rate of one pound per 100 square feet.
- Gently rake the activated charcoal into surface of soil.
- Thoroughly water the activated charcoal treated area.
- Repeat the watering schedule for three days.
- Cease watering and wait two days. After two days, the active ingredient in the product will be neutralized.
- Does Preen® Weed Preventer for Southern Gardens expire?
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No; Preen® Weed Preventer for Southern Gardens has an indefinite shelf-life as long as it's sheltered from moisture and sunlight.
- Can Preen® Weed Preventer for Southern Gardens be stored for next year?
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Yes. Store in a dry place away from sunlight and moisture, atop a piece of cardboard or an old newspaper.
Use with Seeds and Young Plants
- Will flower seeds or grass seed germinate with Preen® Weed Preventer for Southern Gardens?
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Flower seeds or grass seed will not germinate or reseed while Preen® Weed Preventer for Southern Gardens is active (about 4 months per application).
- When can I sow seeds or transplant plants after an application of Preen® Weed Preventer for Southern Gardens?
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Wait 4 months from when Preen® Weed Preventer for Southern Gardens was applied.
Use Around Vegetables
- Can Preen® Weed Preventer for Southern Gardens be applied to a vegetable garden?
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No; injury will result.
- What if I applied Preen® Weed Preventer for Southern Gardens to a vegetable garden?
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Dispose of the vegetable plants and do not eat vegetables from the treated area for one year. Vegetables can be replanted in one year.
Use with Mulch
- Can Preen® Weed Preventer for Southern Gardens be applied on top of mulch?
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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® Weed Preventer for Southern Gardens and water thoroughly.
- Can I apply Preen® Weed Preventer for Southern Gardens before mulching?
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Yes, after removing existing weeds and weed roots. Then, apply Preen® Weed Preventer for Southern Gardens and water thoroughly.
Where to Apply Preen
- Can I use Preen® Weed Preventer for Southern Gardens on my lawn or with grass seed or sod?
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No; turf injury could result. Preen® Weed Preventer for Southern Gardens is not labeled for use on lawns.
- Can I use Preen® Weed Preventer for Southern Gardens in or near a pond, lake, or other type of waterway?
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No; Preen® Weed Preventer for Southern Gardens is harmful to aquatic life.
- Can I use Preen® Weed Preventer for Southern Gardens around, under, or near a swimming pool, sandbox, playground type areas, under bird feeders, etc.?
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No.
- Can I use Preen® Weed Preventer for Southern Gardens in or near a greenhouse or any type of enclosed area?
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No; staining and/or volitization could occur causing plant injury.
- Can I use Preen® Weed Preventer for Southern Gardens where chickens, horses or livestock roam?
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No.
- Can I use Preen® Weed Preventer for Southern Gardens on a garden slope or hillside?
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Yes; if a waterway is not at the bottom of the slope/hillside.
- Can I use Preen® Weed Preventer for Southern Gardens with a plant that is not listed in the recommended established plant section?
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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.]
- How close can I apply Preen® Weed Preventer for Southern Gardens to a non-recommended plant?
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We recommend keeping Preen® Weed Preventer for Southern Gardens at least 12″ outside the drip-line from a non-recommended plant.
- Can Preen® Weed Preventer for Southern Gardens be used in potted plants or planter boxes?
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No; plant injury could result.
- Can I apply between bricks or patio blocks, on pebbles or on other hard surfaces?
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No; Preen® Weed Preventer for Southern Gardens will stain porous surfaces such as brick, patio blocks, stones, etc.
- What plants are recommended with Preen® Weed Preventer for Southern Gardens?
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See our plant compatibility tool or the product label.
Where to Buy Preen
- Is Preen® Weed Preventer for Southern Gardens available outside of the United States?
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No; Preen® Weed Preventer for Southern Gardens is not available or registered outside of the United States.
- Can I order Preen Garden Weed Preventer on your website?
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No, but the product is available at most home and garden centers. Use our store locator to find a retailer near you.
Weeds Controlled
- annual bluegrass (Poa annua)
- annual ryegrass
- barley
- barnyardgrass (Echinochloa crus-galli)
- bittercress (Cardamine)
- black medic (Medicago lupulina)
- brome (Bromus)
- buttercup (Ranunculus californicus)
- Carolina geranium (Geranium carolinianum)
- carpetweed (Mollugo verticillata)
- chickweed (Stellaria media)
- corn speedwell (Veronica arvensis)
- creeping woodsorrel
- crowfoot grass (Dactyloctenium aegyptium)
- dallisgrass (Paspalum dilatatum)
- garden spurge
- goosegrass (Eleusine indica)
- green foxtail (Setaria viridis)
- henbit (Lamium amplexicaule)
- kikuyu grass
- lambsquarters (Chenopodium album)
- large crabgrass (Digitaria sanguinalis)
- lespedeza (Lespedeza cuneata)
- London rocket
- marestail (Conyza canadensis)
- mustard
- parsley piert (Aphanes)
- perennial ryegrass (Lolium perenne)
- pineappleweed (Matricaria discoidea)
- prostrate knotweed
- prostrate spurge (Euphorbia supina)
- purslane (Portulaca oleracea)
- redroot pigweed (Amaranthus retroflexus)
- sandbur
- shepherd's purse (Capsella bursa-pastoris)
- smooth crabgrass (Digitaria ischaemum)
- smutgrass
- southern crabgrass (Digitaria ciliaris)
- spotted spurge (Chamaesyce maculata)
- wild oat (Avena fatua)
- yellow foxtail (Setaria glauca)
- yellow wood sorrel (Oxalis corniculata)
