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What is Preen?
According to company literature, Preen isn’t a weed killer; it’s a weed “preventer.” It stops weeds from growing before they have a chance to spread through germination. It is made of corn gluten and is safe for pets and children. There is one caveat, however: once you’ve sprinkled Preen on the soil or mulch and dampened it to create a weed barrier, keep everyone out of the garden until it dries.
That means keeping your dog and cat (and children, if they like digging!) inside until the beds are no longer moist, usually in about 30 minutes. Otherwise, paws may cause breakage in the new barrier, allowing weeds to poke through and grow. And those same paws might drag bits of Preen (and dirt) into the house and onto your freshly cleaned floors and carpets. No one wants that, especially after a few days of spring cleaning!
Preen Products To Choose From:
The company has three different weed prevention products, each designed for a slightly different type of landscape. Here is a brief overview of each to help you determine which is right for your gardening needs.1- Preen Extended Control Weed Preventer
The advantage of this product is its durability – it lasts as long as six months. It’s designed for use in perennial flower gardens containing as many as 600 plants. It’s also safe to use around trees, shrubs, groundcovers, and even rock gardens.2- Preen Garden Weed Preventer
This product works for up to three months. It can be used for around 200 established plants, including flowers, vegetables, trees and shrubs.3- Preen Lawn Weed Control
This product is made specifically for lawns. It prevents more than 200 broad-leaf lawn weeds, including chickweed and knotweed.How Do You Use Preen?
Preen is extremely easy to distribute. You sprinkle it around the prepared, dry beds, close to but not on top of the stems and leaves of existing plants. Next, you water the area until it’s damp. You can use Preen around flowers, shrubs, trees, herbs and vegetable plants of all kinds. Once Preen is spread evenly around the garden, you can say farewell to weeds for about three months. No more backbreaking labour for almost the whole summer season! You shouldn’t use Preen around aquatic gardens containing waterfalls, ponds and fountains with koi, frogs or other aquatic life. Although you can use Preen at any time of year, it’s most effective if you spread it in early spring, when new or existing plants are about two inches tall. You’ll only need to repair the weed barrier Preen creates if Fluffy or Fido digs into the garden and disrupts it. A quick patch job with a little sprinkle of Preen, and voila! The weed barrier is as good as new.The Company Suggests Following These Four Steps
- First, Remove Any Existing Weeds In Your Garden
Remember, Preen is not made to kill weeds that have already sprouted. It’s made to stop weeds before they have a chance to germinate and spread. Existing weeds must be pulled the old-fashioned way!- Sprinkle
Shake the container of Preen around the garden, using only the prescribed amount in every area.- Integrate
Mix the Preen into the soil or mulch using a rake or similar garden tool.- Water The Garden
Unless rain is imminent, water the garden once the Preen is thoroughly distributed throughout the soil or mulch. Soak it just enough that it will dry in about 30 minutes.Can You Use Too Much Preen?
The answer is: No. Preen is all-natural and non-toxic; it’s not the end of the world if you sprinkle a little too much on the garden. However, keep in mind that wasting any product, even if it’s not harmful to children and pets, isn’t wise. It’s a waste of money and effort! Even though it’s not going to damage the soil if you scatter a little more than the recommended amount, doing so too often can overwhelm foliage, roots and flowers. Don’t use Preen more frequently than the company recommends. Read the instructions carefully, and you won’t go wrong. The instructions on each container explain how much Preen to use per square footage, so follow the guidelines, and the weeds will be a distant memory. One more caveat: Preen doesn’t kill weeds that have already sprouted. You’ll have to pull those when you’re preparing the beds. But once your garden is ready, spread Preen and watch plants, flowers, herbs, and vegetables thrive weed-free!Why Should You Choose Preen Over Other Herbicides?
Getting rid of weeds is a constant challenge facing all gardeners. Just when you think you’ve pulled every last one, a crop of unsightly weeds pops up the following day amidst your beautiful ornamental blooms or stalks of snow peas!
The beauty of Preen is that once you’ve prepared your garden and sprinkled it over the mulch or soil, that’s it for several months. Preen doesn’t kill existing weeds – that’s important to remember. But when you’ve cleared those out of your garden and rid the soil of as many weeds as you possibly can by yanking them out by the roots, the garden is ready for Preen.
It is classified as a “pre-emergent herbicide,” which means it kills the weeds’ seeds in their tracks. They can’t germinate and, therefore, can’t spread. Your vegetables don’t get crowded out by unsightly weeds. Ugly, wispy weeds don’t overshadow your blooms. Depending on which Preen product you use, you’ll get as much as six months free from pulling weeds in your garden.

