Gardener Salary. Gardener average salary is $31,171, median salary is $26,939 with a salary range from $21,611 to $45,000. Gardener salaries are collected from government agencies and companies.Each salary is associated with a real job position.ardener average salary is $31,171, median salary is $26,939 with a salary range from $21,611 to $45,000. Gardener salaries are collected from government agencies and companies.