
Re: Wildflower Farm's Eco-lawn
Don't worry about the crab grass for now. It is very easily killed later when the temperatures lower around Labor Day. For now, worry about the sod.
Yes. By nature, KBG spread and fills in any voids, creating a tightly knit turf when actively growing - read spring and fall's cooler temperatures. For this spreading to occur the KBG needs just a few things. Moisture, nutrients and cooler soil temps.
Absolutely yes.
It is too hot now to have high expectations for your sod. Genetically it just can't do much during summer. Summer is the maintenance period. You maintain its health by keeping it alive with moisture only - no synthetic fertilizers.
For newly laid sod ....
You want to keep the sod moist, not wet.
Week 1-2: 1/4" of water 2-3 times a day should do the trick.
Week 3: 1/4" of water 1-2 times a day.
Week 4: 1/2" of water 1x per day
Week 5 and ongoing: Water deeply and infrequent with 3/4-1" of water, or whenever 30-50% of the turf shows signs of wilt.
If your sod has rooted, meaning when you grab a handful of leafs you can not lift any sod up like a wig or toupee, then water deeply (all at once) and infrequently, averaging 1" of water per week. This is only a guideline. During high heat like we are experiencing now your lawn may need 1.5" of water each week. You might even nee to apply .75" every 4 or 5 days. Let the grass tell you how much and when.
You mention organics. During summer go ahead and drop these gentle fertilizers. Drop Milorganite, soy bean meal, alfalfa meal etc. Drop as often as your pocket allows. With organics, you are feeding the SOIL. With synthetics you are feeding the GRASS. During high heat organics will never burn the grass.
Once Labor Day and the cooler temps come, (I suppose. Don't know where you live) you can begin feeding the lawn to promote growth, spreading and filling in.
There's an old trick you can do which I'll suggest you try. Since killing weeds is easy when they are actively growing ... and since crab grass likes nitrogen also ....
1st week of Sept. - Apply fertilizer. Except apply at only half the normal rate for now.
2nd week of Sept. - Use Weed B Gone w/Crab Grass Killer or the Spectricide equivalent with a Ortho Dial A Sprayer and apply a blanket spray now that the weeds are actively growing form the fertilizer.
3rd week of Sept. - Apply fertilizer at half normal rate again. Weeds are dying, grass is fed and filling in the voids.
4th week of Sept - Now spot spray any new emerged or remaining weeds
During Sept. maintain irrigation, deep and infrequent. Take natural rain fall into account.
Mid October, things will be looking good. Grass is growing, weeds are dying.
Mid October, apply nigh nitrogen fertilizer (first number on the bag label) at full rate.
Spot spray any weeds. Fall is the best time to kill weeds. Some/most are called winter annuals. Prevent them before winter equals little to none the next spring.
Maintain irrigation during October. Take natural rain fall into account.
Mid November/Thanksgiving (again, don't know where you live) when all the leafs are down, when the grass stops growing, when you do that last cut of the year .... drop that high nitrogen fertilizer again, at full normal high rate.
The grass will not use the nitrogen in the fall because it is now too cool for any new shoot growth, but all that nitrogen will be stored in the crowns and root structure until the following spring. Once the soil temperatures are right, in the spring all that nitrogen that was stored as carbohydrates will be used and you will be the first one in the neighborhood with green grass in spring.
For now ... you just need patience.