Preen Extended Control Weed Preventer
Before splurging on this posh weed assassin, consider its effectiveness and pet safety. If your furry friend roams the garden or you're on the hunt for a failsafe weed warrior, you might want to scope out alternatives like Regular Preen or the safer Preen 3 months. Just make sure to read the room (or garden) and choose wisely.
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
 Lowes 90-day returns (in store too) | $2.28 | Feb 26, 2025, may have changed | Buy Now |
 Sam's Club free return shipping | $13.96 | Feb 26, 2025, may have changed | Buy Now |
 Office Depot 90-day returns (in store too) · free shipping on $35+ | $19.99 | Feb 26, 2025, may have changed | Buy Now |
B bbadwiudhadw | $23.00 | Apr 30, 2023, may have changed | Buy Now |
F Frrjejxssoez | $23.00 | Mar 29, 2023, may have changed | Buy Now |
Prices are collected from retailer listings; each row shows the date we last saw that price. Return and shipping terms are each store's standard policy from our retailer research (April 2026). Some products and categories have different terms, so check with the store before you buy.
Price history summary
Lowest new price we recorded at major retailers (Amazon, Walmart, Best Buy, Target, The Home Depot and Lowes) in the last 90 days: $47.95 at Amazon on Sep 3, 2026.
Every price we recorded over the last 12 months was $47.95. Based on 4 recorded prices since Jun 2, 2026 for offers sold by these retailers themselves (not marketplace sellers). Summary as of Oct 13, 2026.
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Product Score
Calculated by ShopSavvy from the professional reviews and customer ratings we collected for this product.
Why this score?
Preen 246422 Extended Control Weed Preventer receives a low score due to mixed effectiveness in controlling weeds, with numerous users reporting an increase in weed growth despite proper application. While some customers appreciate its long-lasting weed prevention capabilities, the product has fallen short of expectations for many, especially when compared to the original Preen formula.
Score
Preen 246422 Extended Control Weed Preventer receives a low score due to mixed effectiveness in controlling weeds, with numerous users reporting an increase in weed growth despite proper application. While some customers appreciate its long-lasting weed prevention capabilities, the product has fallen short of expectations for many, especially when compared to the original Preen formula.
Pros
- •Highly effective at reducing and preventing weeds, even on various surfaces like gravel and soil.
- •Saves time on weeding and is considered worth the cost, despite being on the pricier side.
- •Product lasts a long time and is frequently purchased yearly by many users, showing loyalty and satisfaction.
- •Easy to use - just spread, rake, water, and voila! Weed worries be gone.
- •Recommended to use on top of both fresh and existing mulch for an immaculate garden look.
- •Has had users coming back for more for over 2 years, with plans to continue due to positive results.
Cons
- •Hold on to your fur babies! There's a potential danger to pets, especially dogs, so pet parents beware.
- •Some users found an unexpected twist: weeds looking healthier and more vigorous post-use. Maybe it misunderstood the assignment?
- •Its effectiveness has been questioned by some, with reports of it lasting less than 3 months, making you wonder if it's just taking a mini-vacation.
- •Compared to its cousin, Regular Preen, it's like it didn't quite graduate with the same honors in weed control effectiveness.
- •For the price it demands, some users expected to be wowed but were left feeling like they attended a lackluster garden party.
Bottom Line
Before splurging on this posh weed assassin, consider its effectiveness and pet safety. If your furry friend roams the garden or you're on the hunt for a failsafe weed warrior, you might want to scope out alternatives like Regular Preen or the safer Preen 3 months. Just make sure to read the room (or garden) and choose wisely.
What Reviewers Are Saying
Customer Ratings
Based on 2,070 reviews from Amazon
Professional Reviews
Preen Extended Control Weed Preventer Review
Preen Extended Control Weed Preventer Review
Preen Extended Control Weed Preventer Review
Preen Extended Control Weed Preventer Review
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Discussion
ShopSavvy compares prices across thousands of retailers so you always get the best deal. Prices are collected from retailer listings, and each one shows the date we last saw it. Our expert reviews and community discussion help you make informed buying decisions.