When after a stroke can you expect to see improvements?

Highly variable: Depending on size, location, characteristics, may be permanent, or partially reversible. Age important, as is presence or absence of bleeding and brain swelling. Typically, if improvement is to occur, should see within 90-180 days, but some degree of improvement might be seen as far out as 18 months.

Depends: In general the brain is an amazing organ in that is possess the ability to recover from certain insults. This ability is highly dependent on age (young kids do this amazingly well) , the location of the stroke (function from highly specialized areas can not easily be taken over) and the size of the stroke (if a large area of brain is destroyed). Improvements can be seen after 3 months or longer.