If the test plot that is my backyard, and an exhaustive Google search are any indication, winter injury to warm season turf will be a problem this year.

My test plot showing winter injury. Click for a larger view.

We’ve discussed winterkill before at The Front Porch Blog, but this time we'll go into a bit more depth on strategies for recovery.

There are many strategies for a recovery like the one I’m facing in my test plot.  One is to apply ammonium sulfate at 1 lb N/M per week once conditions are ripe for recovery.  This is an extremely effective method, but probably not the most efficient.  We know that 0.15 lbs N/M per week is the equivalent of maximum growth on warm-season turfgrasses, so we’re likely wasting 0.85 lbs N/M per week.

We can, however, use POLYON® to provide the N we need with minimal excesses and much less labor required.  Three pounds N/M spread in mid-May will provide 10 ½ weeks of maximum warm-season growth, AND you only need send the crew out with the spreader once!

Here's a look at how this will release:

Application Date

Week

Released Nitrogen

Remaining Nitrogen

5/21/2018

1

0.30

2.70

5/28/2018

2

0.16

2.54

6/04/2018

3

0.17

2.37

6/11/2018

4

0.18

2.19

6/18/2018

5

0.19

1.99

6/25/2018

6

0.20

1.79

7/02/2018

7

0.21

1.58

7/09/2018

8

0.22

1.35

7/16/2018

9

0.23

1.12

7/23/2018

10

0.20

0.92

7/30/2018

11

0.13

0.79

8/06/2018

12

0.13

0.66

8/13/2018

13

0.10

0.56

8/20/2018

14

0.10

0.47

8/27/2018

15

0.09

0.38

9/03/2018

16

0.06

0.32

9/10/2018

17

0.06

0.26

9/17/2018

18

0.05

0.21

9/24/2018

19

0.05

0.16

10/01/2018

20

0.03

0.13

10/08/2018

21

0.03

0.11

10/15/2018

22

0.02

0.08

10/22/2018

23

0.02

0.06

10/29/2018

24

0.02

0.04

11/05/2018

25

0.02

0.03

11/12/2018

26

0.01

0.01

11/19/2018

27

0.01

0.00

11/26/2018

28

0.00

0.00