Also had it aerated by my weed and feed guy last Wednesday. But I don't think aeration would cause this? I also don't think prodiamine burns….wth

 

I don't use that one but isn't the 6 month rate around 2.5lbs per 1k sqft?

 

I don't use that one but isn't the 6 month rate around 2.5lbs per 1k sqft?

Oh gosh…let me re do some label reading….🤦‍♂️

 

Ok, now I'm confused. First, it says "treats up to 14,800 sq Ft"

Now here are some shots from the label…..

It says max annual rate 5#/acre (obviously not all at once).

I did 3.8 # per acre.

Then there's the # per acre portion. I used about the 14 setting on mine so it matches my 3.8#/acre

So, perhaps a bit heavy handed, but enough to kill grass in this strange linear form?

Also, I watered in the next morning with 1/2" of water.

 

Just as a heads up, many people do split apps. In new England we typically you would do 3 pre-m apps. You take the maximum annual rate and divide it by 3.

#1 in march for Crab Grass (or when the frosenthia blooms)
#2 2nd week of August for poa-a (or when the nights dip below 70deg)
#3 late September for poa-a

Thats if your not seeding.

 

Just as a heads up, many people do split apps. In new England we typically you would do 3 pre-m apps. You take the maximum annual rate and divide it by 3.

#1 in march for Crab Grass (or when the frosenthia blooms)
#2 2nd week of August for poa-a (or when the nights dip below 70deg)
#3 late September for poa-a

Thats if your not seeding.

Yeah, probably a little heavy on this. Last time I had pre-m put down was end of April and it's been aerated twice since then, so more or less no barrier remaining until my most recent app. (No overseeding)

Just can't figure out what's going on. I sprayed 3-18-18 on the 18th and the weed/feed guy did 40-0-0 w/post emergent 22nd, aerated 25th and prodiamine on the 26th.

I read several posts on here where people did 2x or 5x the app rate, but didn't hear anything about their lawn burning. Just maybe some root issues in the future.

 

I have used this the last 2 years, never had an issue. You did go heavy on it though. Right at the 1.14# AI/acre. I follow the overseed chart, as i need to recover the lawn after a torturous summer every year, and use 0.80# AI/acre.. There is nothing to burn the lawn. I'd have to write Lesco to find out what the inert ingredients are. Though you didn't need but 4 months coverage. Nothing will germinate in the winter anyways. I'd wonder how long it remains in the soil without microbial and ultraviolet degradation and lack of heat. I'd assume it was the 40-0-0.

 

I have used this the last 2 years, never had an issue. You did go heavy on it though. Right at the 1.14# AI/acre. I follow the overseed chart, as i need to recover the lawn after a torturous summer every year, and use 0.80# AI/acre.. There is nothing to burn the lawn. I'd have to write Lesco to find out what the inert ingredients are. Though you didn't need but 4 months coverage. Nothing will germinate in the winter anyways. I'd wonder how long it remains in the soil without microbial and ultraviolet degradation and lack of heat.

I saw that overseed chart and kind of freaked out, but realized that was the overseed rate, which I'm not doing. I emailed the weed and feed guy, he said he's not had any reports of issues from his aeration and weed/feed the days he was out. But he's going to go check those lawns and see if he sees anything out of the ordinary.

I just don't think I could do this to my lawn with prodiamine. As far as I know it doesn't burn, but may cause some root pruning issues if too heavy. Lesson learned there.

I also don't think a granular app could make this type of linear pattern.

 

You have a lot going on there!

The 40-0-0 on the 22nd is highly suspect.

 

I highly suggest going for a much more simplified lawn program next year. It's been pretty messy this year for you between the hired apps and your apps.

 

You have a lot going on there!

The 40-0-0 on the 22nd is highly suspect.

Here's the report card from that app…

 

I highly suggest going for a much more simplified lawn program next year. It's been pretty messy this year for you between the hired apps and your apps.

I agree, two people doing independent apps probably isn't ideal. I did 3-18-18 because he seems to just put down Nitrogen with little to no P or K. The prodiamine was a last minute decision after reading G-Man's discussion about pre-m in the fall.

But, I agree. This co-care thing probably isn't best.

 

Your lawn did not need a blanket post emergent app. This is off the subject, but it goes back to firing that hired guy that has caused issues for you all year.

You really shouldn't be applying anything in addition to, what looks like a high level lawn program that is spec'd out for the year for you.

 

When it's all said and done, you still keep a really nice lawn!

 

Your lawn did not need a blanket post emergent app. This is off the subject, but it goes back to firing that hired guy that has caused issues for you all year.

You really shouldn't be applying anything in addition to, what looks like a high level lawn program that is spec'd out for the year for you.

I did have some broad leaf meandering into the lawn from the neighbor and crab grass. The last app he didnt wasn't very effective so he did the post-m with his late summer fert.

I prepaid the guy for 6 apps, so that's why he's still coming back.

 

Sorry for all the posts.....

Just so you know, it's not out of the ordinary. The lawn care companies in my area have been hitting all the lawns with coated urea fertilizer and post-em over the last week, whether it needs it or not. They did my neighbors lawn and it's a fully dormant crunchy mess of brown right now.

 

When it's all said and done, you still keep a really nice lawn!

I'm trying, but as usual it seems like 1 step forward and 2 steps back. This summer has been pretty good once I dialed in my irrigation. But now I've got what looks like a lawn in trouble and I can't figure out why. Just got another 1/2 inch of rain today so that's 1" in last 4 days. Hopefully that will help flush out whatever seems to be killing my grass.

 

If those spots do not get any worse, the grass will recover/fill in and look great in less than two months.

 

If those spots do not get any worse, the grass will recover/fill in and look great in less than two months.

I'd say I should do a nitrogen blitz to get this stuff filling in but I'm scared of my own shadow in the grass now. Even though I don't suspect it was me and my prodiamine, but still….

 

You can start that in 3 weeks. Until then, just mow.

 

You can start that in 3 weeks. Until then, just mow.

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

 

You can start that in 3 weeks. Until then, just mow.

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

 

Ask them what the 99.32% inert ingredients are.

 

You can start that in 3 weeks. Until then, just mow.

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

This sounds plausible. What I sprayed was 3-18-18. He did 40-0-0 and it was 7 days after what I sprayed. I'm just wondering what of this combo would have over stressed the grass? I have heard of Nitrogen burning grass (obviously) but not so much P or K. Simple Lawn Solutions said due to low N in the 3-18-18 burning wasn't much of a risk, plus a straight 40-0-0 app didn't seem TOO out of bounds, but perhaps my lawn is telling me differently.

What has me very suspicious is the pattern in which the burned spots appear.

Has anyone seen anything like that? @g-man ?

 

So before I light up the weed n feed dude…is the consensus that I probably didn't do this with my prodiamine app? I'll call Lesco tomorrow if I can find a number for them and get their opinion. But none of my research and scouring of the interwebs leads me to believe prodiamine will burn.

The prodiamine wont burn but the combination of the fert you sprayed and the 40-0-0 your lawn guy applied was likely too much for the grass.

This sounds plausible. What I sprayed was 3-18-18. He did 40-0-0 and it was 7 days after what I sprayed. I'm just wondering what of this combo would have over stressed the grass? I have heard of Nitrogen burning grass (obviously) but not so much P or K. Simple Lawn Solutions said due to low N in the 3-18-18 burning wasn't much of a risk, plus a straight 40-0-0 app didn't seem TOO out of bounds, but perhaps my lawn is telling me differently.

It really depends on how much actual N was applied to the yard and how. Spraying .5lbs of N/K via AS is more likely to burn than spreading .5lbs of N/k via AS. You typically dont want to apply more than 1lb of N/k per month. Do you know at what rate the lawn guy applied the 40-0-0?