Question
Hi!  We planted bermuda about 3 months ago. Our back yard, which we have not put half as much time into looks wonderful and pretty much weed free. Our front yard on the other hand, is full of Johnson and crab grass, and on one side of our yard the grass is not green, it's yellow/green and not coming in thick like the back and other side.  I've been reading your posts about sugar.  Could we do that now (July)?  We live in Texas.  We also have a sprinkler system in the front and I think we're watering too much and too shallow (3 times a day for 4 minutes each). Is there anything we could do NOW for our weeds. Thanks for your help!  

Answer
Hi Whitney.
I live in Irving, up by dallas, and I am putting sugar dwn now, because all this terrific heat we have had had affected my microbes.
The yellow greem could be a lack of iron or another nutrient.
I am copying this from Howard Garrett's website. Here is what he says about a good source of iron.

Texas Greensand
Texas greensand (Glauconite) is an iron potassium, silicate that is green in color due to the minerals it contains. Greensand is a marine deposit that contains traces of many if not all of the elements which are in seawater. It has been used successfully for enriching soils for over 100 years. Approximate analysis is 0-2-5. This is a natural source of phosphorous, potash, and trace minerals. Texas greensand is different than the glauconite from the New Jersey area. The natural Texas product contains about 19 percent iron and about 2 percent magnesium. Its pH is 8.3, but don抰 let that fool you. Use it on all plants for an effective green-up. Research at Garden-Ville farm proved green sand to be better than most iron products in helping plants overcome chlorosis in high pH soils, slightly better than granite sand. The iron supplement that we recommend the least is Ironite because tests have shown that it has high levels of lead and arsenic. The company agrees with the existence of the heavy metals but argues that the risk is slight since the product is in the gallena form and not quickly available. As a soil conditioner Texas greensand can be used at 10-50 pounds per 1000 square feet on lawns or tilled into the soil. It is also an excellent amendment for golf greens and tees. In potting soils it can be used at a rate of 5-20 pounds per cubic yard. In a Garden-Ville research project demonstration an eroded field that was low in organic matter with a pH of 8.3 was tested 66 test plots of peas, peppers and okra grown in each plot. All were fertilized equally with organic fertilizer and then each plot got an additional product. Many of them were iron products. Texas Greensand plot at 150 pounds per 1,000 square feet outperformed all other iron test products in the plants green color and growth. It even beat the iron sulfate plot. The only plots that did as good or even better were the compost plots.

Since you live in texas, you have a Calloways near you, probably. they carry quite a lot of organic products.
I think even Walmart carries texas Green Sand and lava sand.
You can get alfalfa meal at feed stores, and that is reallygood for your grass or any plant, especially blooming plants, inside or out.
  Check out Howard Garrett;s site.
He is a scientist, and he knows mopre about organics that anybody.
his website is    www.dirtdoctor.com
Charllotte