Crabgrass Killer FAQ
Is Crabgrass Killer safe?
Yes, Crabgrass Killer is safe around people, pets, and the environment.
Where can I purchase Crabgrass Killer in my area?
Our products are available exclusively at MegaGro.com and through select gardening catalogs. See our shipping page for free shipping offers.
How do I use Crabgrass Killer?
It is very easy, just wet with water the area you want to treat and sprinkle Crabgrass Killer over the area.
How long does it take for the crab grass to die?
Noticeable results will be seen in 5-7 Days.
How soon can I reseed after using Crabgrass Killer?
You can begin reseeding after the crabgrass is noticeable dying, usually 5-7 days. Once you have the crabgrass under control, you can begin seeding. Crabgrass Killer is a post-emergence weed killer, so it won't hurt or inhibit grass seed growth.
How large an area will one bottle treat?
One 2lb. bottle will treat 100-200 sq. ft. depending on applicator.
Will it hurt my grass?
Crabgrass Killer will not harm most grass types, including Bahia, Bermuda, Centipede, St. Augustine, or Zoysia. We have seen Crabgrass Killer damage Bluegrass and Fescue, so take care to only apply directly to the crabgrass in those grass types. We recommend using Crabgrass Killer only as a spot treatment. Complete lawn applications are not recommended for any type of lawn.
Will it kill the weed seeds?
NO, it will only kill actively growing crab grass and weeds.
When is the best time to apply?
Any time crabgrass is actively growing is a good time to get a handle on the crabgrass with Crabgrass Killer. The sooner you killer the less chance it has of going to seed and compounding the problem. Crabgrass Killer is a post-emergence weed killer, meaning it will only kill the crabgrass plants, not the seeds, so any time between early spring and late fall is a good time to apply.
What do you mean by wet enough and why does it turn yellow?
Crabgrass Killer turns YELLOW to let you the consumer know it has been fully activated. Water is the source of its activation so enough water is needed to activate the yellowing and begin the process of killing the crabgrass or weed.
Why do I want it activated and How can I best activate the crabgrass control product?
Within minutes of activation the product begins to work on killing your crabgrass. Water helps the product stick to the leaf tissue for absorption. Wet the area to be killed with a Spray bottle, Backpack sprayer, water hose or irrigation all work affectively. Dust with the crabgrass powder, wait a few minutes, if not activated then lightly mist over the product so as to completely activate. (DO NOT wash the product off of the leaves)
How long should the crabgrass or weed area be undisturbed after the product turns yellow?
24 to 48 hours undisturbed. This product is taken in through the leaves and will "NOT" be taken up through the root system. Irrigation, mowing and rain can disturb the product enough to reduce the desired results and may need to be re-applied.
What do you mean by evenly treated?
More is NOT better, piling this product on weeds will only serve to cost you more money. A nice light to medium complete coating is adequate as long as activation was accomplish.
Is it temperature sensitive?
NO, in all of our years of testing it was 100% affective in all temperatures common to North America. Killing crabgrass has never been easier.
Can I use it year-round?
YES, the beset time to kill weeds is in the fall when they are storing nutrients for winter and throughout the spring and summer when they are actively growing.
What is the Shelf-Life of Crabgrass Killer?
If stored in a cool, dry place, Crabgrass Killer will remain effective for several years. You should avoid storing in areas where it may be exposed to extreme heat or freezing.
If you have a question about Crabgrass Killer or any of our other products that is not answered here, please contact us and we will get back to you as soon as we can.
How to Use Crabgrass Killer
CRABGRASS KILLER works best when applied to wet grass/weed. You can wet the affected area with a hose, irrigation, spray bottle or apply product immediately AFTER rain. Product will turn from white to bright yellow to indicate adequate moisture when applied. If product has not turned yellow it is not activated. A light to medium coating in even strokes will work best. Noticeable results will be seen in 2 to 4 days. Do not apply if rain is forecasted for several days or prior to watering the lawn to avoid washing away the product. Reapply as needed.
Note: For Bahia or Common Bermuda, do not use when turf is dormant or below 60 degrees Fahrenheit.