My front yard 1000 square feet St. Aug has slowly faded. It looks weak and just not healthy. No weeds of any kind. I can go 3 weeks before mowing and that is really not needed other than in spots. It was under total shade until recently when the weather forced me to cut down the big tree in the front. Its in the sun now but still not doing well 2 months later.
I tested the soil and the PH was way too high. It was alkaline.
I started to lower the PH to try and get it going again.
I first aererated it heavily to get access to the soil for treatment.
1. 80 lb green sand over 3 weeks. 2. Shale 40lb bag of shale. 3. 40 lb bag of lava sand 4. I treatment of revive organic spray on
The only other thing I was thinking was some kind of compost top dressing.
Can anyone point me in the right direction. What should I top dress with now?
I have a sprinkler system and seep water once a week.
Joined: Tue Mar 18, 2003 3:45 pm Posts: 2884 Location: San Antonio,TEXAS
Your watering sounds good. If you are mulch mowing at the highest setting, then that is good. The one thing missing is fertilizer. You can apply organic fertilizer heavily 20-30 pounds per 1,000 square feet once now and again in a month. Keep an eye on it. If it does not look better (darker green) in 30 days, then apply more greensand at 40 pounds per 1,000 square feet. Those other rock powders won't have any affect on the pH. Greensand does.
There is nothing you can do about the alkaline soil in Texas. I live adjacent to a defunct limestone quarry. The limestone has a pH of 8. It extends 100 miles in all directions. There is no way to apply enough of anything to overcome all that limestone. The best thing to do is to live with it.
We had some microburst wind gusts last year that took out all the trees on our west side. We have had to relandscape with the sun in mind. So far so good. The St Augustine is clearly much more dense when it gets a lot of sun!
_________________ David Hall Moderator Dirt Doctor Lawns Forum
Joined: Sun Jun 20, 2004 9:12 am Posts: 80 Location: Dallas, Texas
Is there any chance that your augustine has the SAD virus? If your lawn is Floratam, Raleigh or Seville varieties, probably not. But if you've laid Palmetto in the past, watch out! There is no known cure for it. I'm convinced my yard has this virus in certain areas. Symptoms are weak looking or yellowing grass, very slow green up in spring, mottled blades, and weeds or other grasses filling in while the augustine succumbs to the competition.
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