C.D. Howe estimates legalized cannabis could generate about $675 million in government revenues next year.
Premier Brad Wall says government must focus on core services to fill revenue hole.
Alberta premier says budget will be accompanied by a 10-year plan that will remake how province earns and spends money.
Economic growth in the province is projected at just 1.9% for 2014 and about 2.4% a year for 2015-to-2017.