Ahh…the myth of summer planting. This is a common misconception. If this were true, landscapers would be out of business. Plant them as soon as possible…the longer they have to get a root system established, the better off they’ll be able to get through their first winter. It is better to plant in June than July and better July than August. Keep them well watered over the summer. HERE’S a link to more on the myth of summer planting.