Salary by Experience. Salary does not increase much with experience in this occupation. The median pay range for greenhouse workers with up to nine years of experience is $7.60 to $13.80, according to January 2011 data from the PayScale salary survey website.The median range is the middle 50 percent of the earnings scale, the number at which 25 percent earn less and 25 percent earn more.alary Range. The average pay for greenhouse workers as of May 2009 was $9.50 per hour, or $19,800 per year, according to the U.S. Bureau of Labor Statistics.