Renewal date - only allow user to renew at a certain time before expiry date

Our memberships run from year to year ie April 1 through March 31.
We don't decide the price of next year's membership until about a month before ie 1st March. 
In the past we have had people renewing their membership in say February which has meant they get membership at the previous year's price. The way we get around this is to unpublish the membership plans early in the year.
What would be better is not to allow renewals until say 30 days before expiry of the current membership. 
I don't think this is possible at the moment in Membership Pro.
I know you can put renewal prices in each plan, but as I said we don't know the prices until a month before.
Any ideas or suggestions?
KInd regards

Thanks Tuan....I must have looked at configuration settings hundreds of times and did not spot that!!!!
Kind regards
David