You can sponsor a spouse, common-law or conjugal partner, or dependent child to immigrate to Canada if:
you are a Canadian citizen or a permanent resident of Canada.
you are 18 or older.
Federal Income Table, 2016
The following table applies to all provinces except Quebec
Low Income Cut-Off (LICO)
Dependent children
A son or daughter is dependent when the child:
is under age 19 and does not have a spouse or common-law partner
is 19 years of age or older and has depended largely on the financial support of a parent since before age 19 because of a physical or mental condition