July 1 in southwest Michigan (Zone 5) and bees still taking syrup. Can I stop giving it to them?

Background: 2 first year hives, 5 weeks old. One doing well, just added 2nd deep yesterday and they have been taking syrup consistently... half a gallon a week. 2nd hive struggling some but starting to catch up. They stopped taking syrup after 2 weeks though I've made it avaialble to them. They might be taking a little syrup. Hope to add 2nd deep in a week or two.

Should I continue to feed or is it time for them to rely only on nectar?