How soon to inform a tenant of lease NON-renewal?

[Sam Leon]

If you have decided, say 4 months before a lease is to expire, to not renew your tenant's lease, when would you inform him/her?

I don't mean when you have to legally inform the tenant. which I believe in my state it is 30 days prior to lease expiration and if not done then it automatically kicks into a month-to-month.

I mean would you let your tenant know say 3 months before lease expiration so that they have more than enough time to make a move out plan instead of being surprised 30 days out?

Or would informing them sooner could turn the relationship more "toxic" sooner and invite more troubles?