PREEN DOES NOT HARM SHALLOW-ROOTED PERENNIALS OR BULBS FROM GROWING!... read more ›
Sold under brand names such as Preen Organic Weed Preventer, corn gluten meal is considered safe for use around bulbs, shrubs, trees, and ornamental plants. In addition, it's far less toxic than chemical herbicides.... see more ›
It will not harm vegetable seedlings or kill established weeds. When Preen is spread evenly over the soil, it forms a chemical barrier that will prevent most weed seeds from emerging. To be effective, it must be spread after flower or vegetable seedlings have been planted.... read more ›
Preen should not be used on flower seeds. It can be used after flowering plants have germinated and are 2-3 inches tall. Preen may also be incorporated into the soil when seeding vegetables or applied after mulching beds. By applying Preen as early as possible, you can eliminate the need for hand-weeding.... continue reading ›
Preen is considered a pre-emergent herbicide that is used to prevent unwanted seedlings from sprouting. It is nonselective so it will also prevent any seeds that you intentionally planted from growing. It is perfectly safe to use around your hydrangeas or any other established plantings.... see more ›
Hello, Lewis in Virginia: Preen makes a lot of different products, but all of them are safe to use around bulbs as long as the bulbs are buried 3-4 inches deep in the soil.... view details ›
How long does Preen® Garden Weed Preventer stay in the soil? Approximately 8 – 12 weeks per application. The rate at which Preen® Garden Weed Preventer biodegrades will depend on temperature, soil type, rain/moisture, sunlight and amount applied.... see more ›
PREEN DOES NOT HARM SHALLOW-ROOTED PERENNIALS OR BULBS FROM GROWING! Once Preen is applied I suggest that you don't do too much walking or cultivating in the beds because you can “break” up this barrier which will then allow weeds to sprout and grow.... see details ›
If you choose to use the organic corn gluten meal Preen, you must wait six weeks after application before sowing seeds or planting young transplants.... read more ›
When properly used, Preen Garden Weed Preventer reduces the need for hand weeding around your hostas and other garden plants. Hostas (Hosta spp.) grow in U.S. Department of Agriculture plant hardiness zones 3 through 9. Start using this product in spring.... see more ›
Applying Preen Weed Preventer - YouTube... view details ›
- Why Use Natural Weed Killer? ...
- The Top Natural Weed Killers that are Safe for Flowers.
- Boiling Water. ...
- Cornmeal. ...
- Vinegar. ...
- Lemon Juice. ...
- Mulch. ...
If you need extra help controlling weeds, you can apply a pre-emergent herbicide, like Preen, around peony plants after hand weeding, but do this only when peony shoots are at least 6 inches (15 cm.) high.... see details ›
Preen Vegetable Garden Organic Weed Preventer is safe to use around azaleas and hydrangeas. Its only ingredient is corn gluten meal, which will not harm the shrubs or roots. It is a natural pre-emergent herbicide that is the byproduct of processed corn.... read more ›
Lawn weeds can be treated even during summer months, when other weed and feeds would normally burn a lawn, by using Preen Lawn Weed Control. It is a lawn weed killer only and does not contain fertilizer and effectively targets broadleaf weeds.... see details ›
Preen offers an organic version of its Weed Preventer for vegetables, herbs and fruits. It is called Preen Vegetable Garden Weed Preventer. It is safe for shrubs and may work for them. Apply this organic product like the toxic one, but use 5 pounds for 250 square feet and then rake it into the soil.... view details ›
As you plant your bulbs, using an organic mulch such as pine needles, pine bark or another shredded bark may help reduce the chance of weed problems when the bulbs emerge. Use 2 to 4 inches of mulch for your best chance at preventing weeds from growing.... see more ›
A ready-to-use, glyphosate-based herbicide will kill bulbs -- along with other plants, including grass. Use glyphosate when bulbs are actively growing; dormant plants don't transport chemicals to roots.... see more ›
Once applied, they bond with soil particles where they do their work, then are consumed by soil microbes and biodegrade and within six months to a year or so are no longer active. Preen weed preventers are not water-soluble and will not leach into ground water.... read more ›
Preen Weed Preventer
It is safe to use around over 200 different types of established flowers, trees, shrubs, and even vegetables. This made our list because it actually prevents weeds and can be safely used around pets.... see more ›
For best results, apply the Preen when plants are dry to avoid damaging them. Wait until flowers are at least 3 inches high before applying Preen. Apply approximately 2 inches of mulch to the growing area, spreading the mulch evenly to cover the entire soil area.... read more ›
- Use an edging tool to cut a sharp edge around garden beds before mulching. ...
- Use Preen Mulch with Extended Control Weed Preventer for added weed protection. ...
- Leave space between the base of the plant and the mulch. ...
- Pay extra attention around the base of trees and shrubs. ...
- Water after applying mulch.
Pre-emergent and fertilizer work well together because both need to be watered into the soil to be effective. By applying both at once and watering them in, you simultaneously feed your grass and stop weed seeds from sprouting.... see more ›
Yes, vinegar does kill weeds permanently and is a viable alternative to synthetic chemicals. Distilled, white, and malt vinegar all work well to stop weed growth.... continue reading ›
The big problem you may have, though, is I doubt the active ingredient in preen will do anything to stop maple seeds from germinating. It is mostly a grassy weed preventer, with some broadleaf weed control, but may not do anything against tree seeds.... read more ›
For those tee tiny weeds, I use a hoe. Most weed seeds will not regenerate from the roots if you catch them early enough. I also have a hand tool that looks like a hoe blade but is very sharp and I use that in areas with the tiny seedlings and it cuts them off. Good luck eliminating them, they are a PITA.... see more ›
Mulching. Apply a layer of mulch to your hostas and your shade garden in spring and fall if it is getting thin. Choose a mulch that will decompose and add humus to the soil and therefore nutrients for your plants. Examples include: compost, peat, shredded bark, pine needles, or shredded leaves.... see details ›
“If an applicator applies too much herbicide, not only is it not cost effective and a label violation, this may injure the desired turfgrass depending on the rate and product used. An excessive application may also prevent the proper establishment of grass seed later in the season.”... read more ›
Never apply pre-emergent and post-emergent herbicide at the same time. Pre-emergents work by being watered into the soil to kill weeds before they sprout. Post-emergents work by being left to dry on weeds that have already sprouted.... read more ›
Applying a weed preventer now will stop weed seeds from growing and make your flower beds weed-free all season. After applying a weed preventer over the ground, spread a blanket of mulch around your plants. It blocks the sunlight, preventing weeds from growing. Mulch also saves money on water.... read more ›
One of the most popular is spraying a solution of vinegar, salt and dish soap where you don't want grass or weeds to grow. Use a highly acidic vinegar found at hardware and garden stores as opposed to the 5 percent acetic acid in most household vinegar. Keep in mind there are downsides to this method.... see details ›
Yes, Preen can kill grass in several different ways. However, Preen won't always kill established grasses or lawns on contact. As a pre-emergent herbicide, Preen is more likely to slow growth, damage the nutrient absorption process, and kill any seeds before they get started.... see details ›
Personal Safety Considerations
Preen Garden Weed Preventer may cause irritation to eyes or skin. Wear eye protection when handling this product. Do not attempt application on a windy day, as it will be harder to keep it off your face and body.... see more ›
Do not use any type of weed killer, pre-emergent (Preen), or herbicide in or around your dahlias. If weeds will not grow there, neither will your dahlias.... view details ›
5.0 out of 5 stars It works! This stuff works! I have several large landscaping beds that the previous owners put rock mulch in. After 10+ years, the 2-3" of rocks have a significant amount of dirt (silt) embedded in them.... continue reading ›
Organic herbicides containing vinegar, clove oil and citric acid kill the above-ground portion of the weeds but won't harm the roots and are best to use on young weeds without an established root system. When using the organic herbicides, do so during the hottest part of the day when the sun is at its brightest.... see more ›
Weed, pest, & disease control
Since bulbs are live plants, weed preventers don't affect them as they do seeds. To control weeds among bulbs, scatter Preen Garden Weed Preventer over the beds in early spring according to label directions. Bulbs are seldom bothered by bugs or diseases, so spraying is unnecessary.... see details ›
As you plant your bulbs, using an organic mulch such as pine needles, pine bark or another shredded bark may help reduce the chance of weed problems when the bulbs emerge. Use 2 to 4 inches of mulch for your best chance at preventing weeds from growing.... read more ›
I've been using Preen for years now. By safe, I assume you are asking if it will harm the daylilies. It will not harm ANY planted, growing perrenials or shrubs. DO NOT use it in any seed beds though.... see details ›