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Preen Garden Weed Preventer Plus Plant Food, 16 lbs

TLDR Review: Preen Weed Preventer Plus Plant Food

By ShopSavvy Team

Published: June 23rd, 2026

Pros

•Effective at preventing weeds from taking root if applied before they appear
•Comes with a useful scoop for easy application
•Includes a reusable lid, making storage convenient
•Contains fertilizer, promoting healthier plants and better garden growth
•Easy to sprinkle over exposed areas with minimal effort
•Suitable for fall and winter fertilization, extending its usefulness yeaound
•Performs reliably and meets expectations, according to several reviews
•Better value compared to natural alternatives like corn gluten in cost and results
•Weluited for large yards and extensive weed control needs
•Can be used in conjunction with mulch for improved garden health

Cons

•Does not kill existing weeds, only prevents new growth
•Needs to be applied *before* weeds germinate; ineffective against established weeds
•Requires multiple applications over several months for larger areas
•Some users report it seems to fertilize weeds rather than eliminate them
•Does not address current weed infestations, leading to frustration if weeds are already present
•Overall performance is average without standout features
•Followed instructions precisely but saw no weed control benefits in some cases
•Effectiveness can be limited if not applied early enough in the growing season

Bottom Line

For those looking to stop weeds *before* they sprout, this product offers a solid, convenient option that also feeds your plants. However, if you’re dealing with existing weeds or want quick eradication, you might want to consider a product specifically designed to kill weeds upfront. Since it performs best as a preventive measure and enhances plant health, it’s ideal for early-season garden prep and ongoing fertilization.

Lowest at any Popular Retailer

$34.76 at Amazon

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 60 retailers to give you the short version.