Okay, I know I posted an answer about an hour ago and now it's not here? So if it shows up...sorry for the duplicate. The 5 gallon I just bought @ Summer Winds says water 3 x's a week. I'm sure you could get by with less in the Winter ;)

Thanks G.T. - A year or so ago I planted some ( in a different spot). As soon as I planted we got some rain, and my myrtles were in a low spot - I think they got too much water! So,I was concerned, but sounds as if I can hook up to my existing drip which waters 3 x's a week in summer. These are planted on the high side of a slope, so hopefully won't have the same problem.

I have a large dwarf myrtle, about 8 feet tall and 10 feet in width. I don't water it at all. Its in my rocks and its center is about 8 feet from the grass, so I'm guessing it gets what it needs when I water the grass.

Yeah, myrtle is a Mediterranean plant is is pretty drought tollerant. It's pretty comparible to Italian cypress and rosemary in that sense. It should to great with a deep watering once every 1 or 2 weeks during the summer and maybe none at all during the winter depending on how much winter rain we get. If you're using is as a hedge you want to keep it healthy looking but don't want to encourage a lot of lush growth that you'll have to keep trimmed. Dwarf myrtle is one of the few plants that makes a beautifullly green hedge here in Phoenix that doesn't get burned up in the summer. Since it naturally grows tall unless it's trimmed you can even train it into a tree. They make really neat looking, twisting trunk trees-almost look like an olive. BUT, they drop hundreds of these little blue fruits all over the place that make a mess. If you keep it trimmed in a hedge you don't have to worry about the messy fruit.