It is great that you are helping your neighbor get restarted. God bless you!
I know of only two ways to lose an entire yard of St Aug in one season. The most popular way is to let nature do your watering. St Aug does not go dormant from underwatering, it goes dead. It will not come back once it is dead. But if you have one sprout that lived, it will completely regenerate a lawn at a rate of 10 feet per season. Please help him set up the sprinklers to run on auto on a weekly basis and to get plenty of water down. I'm thinking of an hour in each zone. And I always suggest overlapping the zones by 50% so there can be no dry spots. The impact type sprinklers lose less water to evaporation because the droplets are large. Mist type heads lose water to evap because the drops can be so tiny they drift away and evaporate before hitting the ground.
The second way to lose an entire lawn is to let a disease go rampant without applying corn meal. Had he applied corn meal regularly (on the major federal holidays or more often) he should not have had any problems. This is an area where you can help him keep an eye out.
Compost should go on top, not underneath. Nature ALWAYS works from the top down. If you want results like Hers, try to mimic her techniques as much as is practical. But I would not apply compost at all. It is too expensive. Unless you have had a major chemical spill like a commercial fungicide, baking soda, or sulfur, then your soil microbes are all there. All you need to do is feed them with an organic fertilizer. I like corn meal or corn GLUTEN meal. Keep it simple, especially at first. Corn meal both fertilizes and keeps the fungal disease away, so it is easy to be successful with that.
Now is a poor time for seed. If he wants bermuda, wait until June to seed. If he wants fescue or bluegrass, wait until October to seed. Sod is all you can do successfully at this time. Then he can use CGM on the sod right after installation. If he sods, all the sod has to get put down immediately. Sod sitting on the palatte is drying out and dying.
_________________ David Hall Moderator Dirt Doctor Lawns Forum
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