SKU: 26204106343
dithiopyr 40 wsb pre emergent herbicide

dithiopyr 40 wsb pre emergent herbicide Yard Mastery .172% Dithiopyr Pre-Emergent Herbicide with Fertilizer

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Description

dithiopyr 40 wsb pre emergent herbicide Yard Mastery .172% Dithiopyr Pre-Emergent Herbicide with FertilizerImportant Shipping Restrictions: Alaska, California, Hawaii, Maine Looking for Dithiopyr pre emergent? This is it; we just now have it under the original brand name, Dimension. Dimension (dithiopyr) Pre Emergent is a granular pre emergent herbicide used to stop invading weeds and weedy grasses in lawns. It targets most of the same weeds as prodiamine, so we typically use this in the fall if you live somewhere where longer protection is needed but

Important Shipping Restrictions: Alaska, California, Hawaii, Maine

Looking for Dithiopyr pre-emergent? This is it; we just now have it under the original brand name, “Dimension.”

Dimension (dithiopyr) Pre-Emergent is a granular pre-emergent herbicide used to stop invading weeds and weedy grasses in lawns. It targets most of the same weeds as prodiamine, so we typically use this in the fall if you live somewhere where longer protection is needed but you’ve reached your yearly limit with prodiamine. In short, this works pretty much the same as prodiamine.

  • Covers 6,000 sq ft (18 lb) - OR - 15,000 sq ft (45 lb)
  • .19% Dithiopyr is the active ingredient 
  • Great for crabgrass and other grassy and broadleaf weed prevention
  • Available in multiple sizes*

Product Description:

Dimension Pre-Emergent is an excellent choice to prevent annual bluegrass (poa annua), Henbit, hairy bittercress, chickweed, and other annuals if you are NOT SEEDING/OVERSEEDING your lawn.  It is a primary part of the fall strategy down south for longer protection due to milder winters. 

*Size options and coverage: 

  • (1) 18 lb bag = covers up to 6,000 sq ft
  • (1) 45 lb bag = covers up to 15,000 sq ft 

Application Information: 
The best time to apply Dimension is when soil temperatures are below 70F and above 55F. This will give you approximately 3 - 4 months of pre-emergence protection if you follow the recommended application rate of 3-4 lbs/1000.

To find out your soil temperature and when to apply your pre-emergent, check out our FREE app. 

You can use Dimension (Dithiopyr) pre-emergent in the spring or fall. However, the LCN/YM programs primarily use this in the fall for anyone who has reached their annual maximum on Prodiamine. For more information on annual limits for Prodiamine, check out the chart here. 

Looking for a pre-emergent strategy? Check out our FREE Pre-Emergent Guide. 

Dimension Pre-Emergent  can be used on the following established grasses: 

  • Cool-Season Lawns - Kentucky Bluegrass, Turf Type Tall Fescue (all fescues), Ryegrass. 
  • Warm-Season Lawns - Common and Hybrid Bermuda, St Augustine, Zoysia, Centipede, Bahia.

**DO NOT use Prodiamine if you are seeding or reseeding, as it will keep your seed from germinating.

Coverage

18 lb bag covers 

45 lb bag covers 

Application Details 

Apply at 3-4 lbs per 1,000 square feet of lawn area for 3-4 months of protection 

If you live further south, a second application in the fall or winter may be needed to sustain the weed barrier. 

Water-In instructions

Apply to a dry lawn, and water into the turf with 1/2" of rainfall or irrigation.

 

Product Resources: 
Label: Dimension Info 
Package Includes: (1) 18 lb bag OR (1) 45 lb bag based on selection 
Storage: Store in a cool dry place, away from direct sunlight. Will store for up to 2 years. 

Shipping Information: 

Shipping costs

Included for most states within the U.S.

NO P.O. Boxes

$9.95 for  ID, OR, UT, NV, and WA

Stickers

Yes, free sticker with this item 

State Restrictions

Alaska (AK), California (CA), Hawaii (HI), and Maine (ME)

Typical Delivery time

4 - 7 business days

Product Type

Granular

Cancel/Return/Exchange

All sales are final, with no cancellations, returns, or exchanges.

 

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 26204106343

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4.3 ★★★★★
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C
coffeeandcode
Lake Worth, US
★★★★★ 4
Awesome, portable room divider for larger rooms
Color: Black, Color: Black
I chose this room divider to use in my son's room that also serves as my home office! It is 72" x 72" in size, so it truly blocks out the other side of the room for optimal privacy. Once it's assembled, it's mildly sturdy - as long as you can bet both ends with the "feet" in line with the ground. I wish that the framework poles had more of an interlocking system so that the divider was easier to erect. I assembled this on carpet, so I had some issues getting the divider to stop moving. It takes a lot of work to set up, as it is massive, so definitely have someone help you. I would suggest adding weights of some sort to the feet of this divider to keep it from shifting. I ended up leaning mine against a bookcase shelf so it wouldn't lean. All and all, this is a great product if you are looking to make a room multipurpose.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 2, 2025
J
Verified Purchase
John Grey
Birmingham, US
★★★★★ 5
As described
Color: Black
Light weight, easy to put together and you can disconnect the ends and just roll the whole thing nice and tight for quick out of the way storage. Pretty sturdy, doesn't fall over if you bump into it, you could use it outside but if there's a lot of light you can see through a tiny bit if you're really close but I only tested this indoors so not sure about patio types
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
A
Verified Purchase
Amyth4
Whiting, US
★★★★★ 2
Flimsy - choose something else
Color: Black
Very flimsy and barely stands up… better options out there.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 11, 2025
A
Amazon Customer
Port Orchard, US
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well. Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely. One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs. The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers. Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster. Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality. Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
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Reviewed in the United States on May 27, 2026
F
Fred
Dallas, US
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one. The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy. Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex. The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one. The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026

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