When to notify tenant of rent increase

[Joshua Myers]

I'm wondering when people on BP normally notify their tenants of upcoming rent increases. In the past I've given 2 months notice to be generous and give people time to figure out if they want to move somewhere else. I haven't minded tenants moving because I've been upgrading properties and bringing rents up even more. But now that things are slowing down I'm not sure if that's the right way to do it.

Any thoughts?