When to fertilize crab grass?

[southernultrablack]

I broadcast about 5 acres in red river crabgrass today. It's suppose to be in the 50's for a couple of days and then climb back into the 70's. When should I fertilize to best help the crabgrass. Will it start to germinate when the temps get back in the 70's? Should I fertilize now or wait a week?
For what it's worth, I planted on the tail end of a big rain and will let the cows walk it in for a bit.

 

[kenny thomas]

Not gonna be much difference in a week. What are you spreading on it? N works fast, P and K takes up to a few months to break down.

 

[southernultrablack]

Not gonna be much difference in a week. What are you spreading on it? N works fast, P and K takes up to a few months to break down.

Was going to do a pasture blend
23-7-14 or something like that.

 

[kenny thomas]

Not gonna be much difference in a week. What are you spreading on it? N works fast, P and K takes up to a few months to break down.

Was going to do a pasture blend
23-7-14 or something like that.

I keep saying this but what does your soil need to grow crabgrass? The Nitrogen will work within days so I would let the grass get up first.

 

[Douglas]

Post emergence fertilizing and spraying must be done after Quick-N-Big® and Red River crabgrass is tillering (stooling)
or is up to 2 to 4 inches tall. Too soon can cause stand damage. Never use liquid nitrogen on young crabgrass,
Never top dress or spray weeds at too young a stage, especially on wet soil, and never put broiler litter on just
before planting or volunteer emergence or when crabgrass plants are too small. Refer to Production above.

Also visit our web site http://www.redrivercrabgrass.com , and the Noble Foundation Web site : http://www.noble.org