Most lawn fertilizers have about 30 percent nitrogen, which is way too much.
Look for a fertilizer with time-releasing water-insoluble nitrogen and use it only twice a year on a steady schedule, like on Memorial Day and after Labor Day. In general, well-irrigated and older lawns need less fertilizer. (Just make sure you’re aware of the risks of using fertilizer if you do.)
Watch out for a gorgeous plant called purple loose-strife, or Lythrum salicaria, which a lot of nurseries still sell.
Though it’s inexpensive and has a lovely flower, it’s an invasive species that will spread everywhere and choke out other plants.
One inch of water once a week is ideal, maybe once every five days in extreme heat, depending on your soil.
Infrequent watering encourages roots to grow deeper to find groundwater, creating a stronger plant.
Here’s how you can fix some common lawn problems.