Register free!
Search
 
     

Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 03-17-2013, 11:33 PM
wrooster wrooster is online now
LawnSite Member
 
Join Date: Aug 2007
Location: NJ
Posts: 56
Guideline for initial fertilizer/pre-em application?

Gents,

Is there a basic rule-of-thumb in terms of average temperature (specifically soil temperature) for initial springtime application of N and pre-emergent?

Right now in north/central NJ, the soil temperature is a bit lower that normal -- as there has been little sign of spring to date, and in fact it's 28'F outside right now.

Clicking here shows soil temperature to be about 40'F:
http://climate.rutgers.edu/njwxnet/m...erature1&t=cur

So...

a) there isn't much sign of the turfgrass coming out of dormancy. I have TTTF (Johnathan Green Black Beauty Ultra, specifically).
b) waiting for the 2nd cut of the grass this year seems perhaps a bit late for effective pre-emergent application.
c) when, then?
d) would it be beneficial to split application of the N and pre-emergent, rather than using a single integrated product?

Thanks,
Wrooster
Reply With Quote
  #2  
Old 03-18-2013, 12:06 PM
DA Quality Lawn & YS's Avatar
DA Quality Lawn & YS DA Quality Lawn & YS is offline
LawnSite Fanatic
 
Join Date: Sep 2007
Location: Rochester, MN
Posts: 7,824
First off you are jumping the gun to the extreme thinking you are close to flinging out fert and pre now.
Hold the horses.
Crab begins to germinate at 50 deg. soil temps, and that has to be a consistent temp not just a daytime hi temp.
Around there, that doesn't happen normally until mid May or so. Last year was anomaly. You have to adjust each year. Find a soil temp website online to use, or go according to your own meter.
__________________
7x14 Stealth SE Enclosed with 48" side ramp
08 Toro Z400 48" deck, 21HP Kaw with EZ Vac twin bag
09 Exmark Turf Tracer HP 36"
21" Toro SR4 Super Recycler
Stihl KM90 Kombi w/ straight shaft trimmer & tiller heads
Husqvarna 125B Blower
PG Magnum
Turfco XT5 Aerator
Turfco LS-22 Overseeder

I can do all things through Him who gives me strength.
Philippians 4:13
Reply With Quote
  #3  
Old 03-18-2013, 02:42 PM
wrooster wrooster is online now
LawnSite Member
 
Join Date: Aug 2007
Location: NJ
Posts: 56
Are you perhaps posting from a smartphone?

Quote:
Originally Posted by DA Quality Lawn & YS View Post
First off you are jumping the gun to the extreme thinking you are close to flinging out fert and pre now. Hold the horses.
Where did I mention above that I was looking to apply anything right now?

Quote:
Originally Posted by DA Quality Lawn & YS View Post
Crab begins to germinate at 50 deg. soil temps, and that has to be a consistent temp not just a daytime hi temp. Around there, that doesn't happen normally until mid May or so. Last year was anomaly. You have to adjust each year. Find a soil temp website online to use, or go according to your own meter.
Above, in my original post, you may see a link to just such a website.

My question:
Quote:
Originally Posted by Wrooster
Is there a basic rule-of-thumb in terms of average temperature (specifically soil temperature) for initial springtime application of N and pre-emergent?

Wrooster
Reply With Quote
  #4  
Old 03-19-2013, 10:09 AM
Smallaxe Smallaxe is offline
LawnSite Fanatic
 
Join Date: May 2007
Location: Central Wisconsin
Posts: 9,820
After the second mowing would be a fine time for both fert and pre-m... the grass tells you more about how conditions in the soil are than average temp websites...
Depending on your HEAT conditions such as sandy soils with thin grass baking in the sun all day, may very well quickly have CG germinating as soon as the second mowing is finished...
If you have realitively thick grass on fertile soils and partial shading from nearby trees throughout the day ,,, you may not see CG until the mid-Summer period...

There is no One-Size-Fits-All button...
__________________
*
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage
,,, I wonder what does...
*
Reply With Quote
  #5  
Old 03-23-2013, 11:46 PM
boss75 boss75 is offline
LawnSite Member
 
Join Date: Mar 2013
Posts: 6
Quote:
Originally Posted by DA Quality Lawn & YS View Post
First off you are jumping the gun to the extreme thinking you are close to flinging out fert and pre now.
Hold the horses.
Crab begins to germinate at 50 deg. soil temps, and that has to be a consistent temp not just a daytime hi temp.
Around there, that doesn't happen normally until mid May or so. Last year was anomaly. You have to adjust each year. Find a soil temp website online to use, or go according to your own meter.
Hello, do you know of such a web site that that would give me the temp. for SE Mich.
Reply With Quote
  #6  
Old 03-24-2013, 03:35 PM
RigglePLC's Avatar
RigglePLC RigglePLC is online now
LawnSite Fanatic
 
Join Date: Jul 2006
Location: Grand Rapids MI
Posts: 9,252
Neither of my soil temp links is working. Maybe they think it is too early to start. You could assume that crabgrass will arise on about the first frost-free date in your area.
http://www.farmersalmanac.com/weathe...e-frost-dates/
Crabgrass is killed by frost of course.
Reply With Quote
  #7  
Old 03-24-2013, 04:31 PM
GreenUtah's Avatar
GreenUtah GreenUtah is offline
LawnSite Senior Member
 
Join Date: May 2005
Location: SLC, UT
Posts: 866
Since the almanac was mentioned, you can also use forsythia as a visual clue in the northern climes. It will generally set its blooms when the soil temperature is approaching germination temps.

As mentioned earlier, turf with south/southwest exposures, surrounded by cement, asphalt, reflected light/heat, thin and dry, etc. etc. will go sooner. If you can locate and visually cue off a forsythia bush in those circumstances, you may not need to soil temp sample each day if that's not your thing.
__________________
http://www.mygreenutah.com
Reply With Quote
  #8  
Old 03-24-2013, 07:53 PM
Smallaxe Smallaxe is offline
LawnSite Fanatic
 
Join Date: May 2007
Location: Central Wisconsin
Posts: 9,820
Quote:
Originally Posted by GreenUtah View Post
Since the almanac was mentioned, you can also use forsythia as a visual clue in the northern climes. It will generally set its blooms when the soil temperature is approaching germination temps.

As mentioned earlier, turf with south/southwest exposures, surrounded by cement, asphalt, reflected light/heat, thin and dry, etc. etc. will go sooner. If you can locate and visually cue off a forsythia bush in those circumstances, you may not need to soil temp sample each day if that's not your thing.
Forsythia predicts Broadleaf,,, not crabgrass...
__________________
*
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage
,,, I wonder what does...
*
Reply With Quote
  #9  
Old 03-27-2013, 12:32 PM
GreenUtah's Avatar
GreenUtah GreenUtah is offline
LawnSite Senior Member
 
Join Date: May 2005
Location: SLC, UT
Posts: 866
Quote:
Originally Posted by Smallaxe View Post
Forsythia predicts Broadleaf,,, not crabgrass...
http://purdueturftips.blogspot.com/2...germinate.html
__________________
http://www.mygreenutah.com
Reply With Quote
  #10  
Old 03-27-2013, 05:13 PM
Smallaxe Smallaxe is offline
LawnSite Fanatic
 
Join Date: May 2007
Location: Central Wisconsin
Posts: 9,820
Quote:
Originally Posted by GreenUtah View Post

* " Plant Phenological Indicators: The flowering of landscape plants can also be used as a good estimate of when crabgrass might be germinating. Many are aware that forsythia is traditionally considered a good plant to indicate that crabgrass will soon start germinating. Forsythia will be in full bloom prior to crabgrass germination and forsythia flowers will wither near crabgrass germination (Masin et al., 2005; Cardina et al., 2011). Most think that crabgrass germinates when forsythia blooms, but this is false. Instead, turf managers should use forsythia blooms as an encouragement to hurry up and get their preemergence application made before crabgrass begins to germinate. ..." *

Interesting comments from Purdue... Perhaps it is closer to the truth in the areas that they have tested...
However:

My experience in CentroWisco is that firsythia blooms around the 3rd week in April...
Full Sun well warmed garden soil has its germination flush in the first week in May...
The earliest I've ever seen CG in lawns is sometime in June,,, but it is closer to July when we finally get hot...

I never use pre-m so I get to spot it, if and when it occurs...
__________________
*
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage
,,, I wonder what does...
*
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 12:08 PM.

Page generated in 0.07569 seconds with 9 queries