If you are overseeding your lawn during the growing period you will need to water every morning for 14 days even on the days that it rains unless it's a very heavy rain, its recommended that you water as well. When your goal is to maintain a healthy lawn it is recommended to water once a week or every 5 to 7 days so you can simulate a heavy rainstorm, it is not recommended to water every other day. When you're trying to find the right amount of water to apply to your lawn when applying nematodes it is recommended that you take a can the size of a small tuna can and place that beside your sprinkler and time how long it takes for the sprinkler to fill the entire can. Many homes have different water pressure which is why this tip is so helpful when determining how much water to apply to your lawn. It may take anywhere from 20 to 40 minutes for the sprinkler to fill the can when you time it the first time you will know the exact amount of water in the exact amount of time it takes for what you need. When doing a nematode application the lawn area must be very very wet and it is recommended that you fill three cans. the time that it takes to fill three small tuna cans is how long you should water your lawn prior to the application. After the application, you will want to water the same amount of water for the three consecutive mornings of the treatment.Price - 20kg bag for $40 - Turf Shark Granular Top Dressing is the main product we use to improve all our client's lawns and gardens.