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Crabgrass Killing during Heat

12K views 9 replies 6 participants last post by  1FASTSS  
#1 ·
Hey guys-

I wanted to run by some options as far as killing crabgrass during the heat of the Summer. Quick background-
- Charlotte NC
-I had a horrible planted Fescue backyard by the contractor. Almost nothing grew. I ended up killing it off, and going with Bermuda seed as I have bermuda sod in the front/sides. I didn't want to be changing mowing heights every mow.
- 10 Days after seeding, there was some germination. This was followed by the tropical storm coming through and dumping 4-5 inches in a few days. Washed almost EVERYTHING away. I re seeded again.
- Enter crabgrass. Made a good environment for growth, and it came out like crazy. Id say it covers nearly 40% of the yard.

I have free access to almost anything bigbox store wise. So i'd prefer to keep it to those products.

Its getting to 90 deg every day. Can I apply Weed b gon crabgrass? It says not to over 85, but is that time of application or for a few days after? Can I apply in the evening when its under 80?

Should I blow this up again and re seed?

Ive also seen Fahrenheit Herbicide is comparable to Celsius (and 1/4 the price). Is this legit?

Sorry to be long winded!
 
#2 ·
BigBoxLawn said:
Ive also seen Fahrenheit Herbicide is comparable to Celsius (and 1/4 the price). Is this legit?
Not comparable except that both names measure temperature. They have completely different active ingredients and Fahrenheit is more temperature limited than Celsius. The only time I have seen it compared is by sellers who do not have Celsius in stock.

Similar example, "We are out of apples but oranges are in stock. They're both fruits and the oranges are at half price."
 
#3 ·
Celsius WG (takes care of most southern weeds except sedges and a few others). Don't scoff at the $100/bottle price tag. It is very cost effective. Putting out the yearly max on your 5k lawn in 2-3 apps a year it'll last 10 years!
https://www.lawnandpestcontrolsupply.com/products/celsius-wg-herbicide-10-oz

OR

Quinclorac (pretty much just crab grass)

This is enough to do your lawn 10 times. It'll take multiple applications to kill the crabgrass.
https://www.domyown.com/quinclorac-75-df-p-16573.html

Also you'll need a preemergent to keep it from coming out all summer.

Don't limit yourself to bog box store supplies. It'll gimp you. It's more expensive for worse results on basically every product except the most basic of fertilizers. You will EASILY spend more than both of these combined and waste a ton more of your time screwing around with crap from Home Depot.
 
#6 ·
WDE46 said:
Celsius WG (takes care of most southern weeds except sedges and a few others). Don't scoff at the $100/bottle price tag. It is very cost effective. Putting out the yearly max on your 5k lawn in 2-3 apps a year it'll last 10 years!
https://www.lawnandpestcontrolsupply.com/products/celsius-wg-herbicide-10-oz

OR

Quinclorac (pretty much just crab grass)

This is enough to do your lawn 10 times. It'll take multiple applications to kill the crabgrass.
https://www.domyown.com/quinclorac-75-df-p-16573.html

Also you'll need a preemergent to keep it from coming out all summer.

Don't limit yourself to bog box store supplies. It'll gimp you. It's more expensive for worse results on basically every product except the most basic of fertilizers. You will EASILY spend more than both of these combined and waste a ton more of your time screwing around with crap from Home Depot.
Thanks for the input on Celsius. Nice to have a bigger picture on it.

Quinclorac will be dependent on temps correct? Is it only time of application and I can apply in the evening, or does it depend on the daily temps? (I have plenty of access to quinclorac)
 
#8 ·
Spammage said:
Image All In One has quinclorac and sulfentrazone. Both can be somewhat phytotoxic at high temperatures, but it at most it may just discolor the lawn for a short time. I would avoid any mixtures that contain 2,4-d though as that can be especially harsh at high temperatures.
Awesome info. I will check out Image tonight. I currently have Weed B Gon, but it does have 2,4-D as its main active.

Spraying in the evening or early morning would be my best bet I assume? Just to be safe on temps.
 
#9 ·
BigBoxLawn said:
Spammage said:
Image All In One has quinclorac and sulfentrazone. Both can be somewhat phytotoxic at high temperatures, but it at most it may just discolor the lawn for a short time. I would avoid any mixtures that contain 2,4-d though as that can be especially harsh at high temperatures.
Awesome info. I will check out Image tonight. I currently have Weed B Gon, but it does have 2,4-D as its main active.

Spraying in the evening or early morning would be my best bet I assume? Just to be safe on temps.
Yes, but you could still have some injury/discoloration.
 
#10 ·
Redtwin said:
BigBoxLawn said:
Ive also seen Fahrenheit Herbicide is comparable to Celsius (and 1/4 the price). Is this legit?
Not comparable except that both names measure temperature. They have completely different active ingredients and Fahrenheit is more temperature limited than Celsius. The only time I have seen it compared is by sellers who do not have Celsius in stock.

Similar example, "We are out of apples but oranges are in stock. They're both fruits and the oranges are at half price."
:lol: