Nearly half of Americans say that growing marijuana should be legal, and even more support legalizing the growing of hemp, according to a new HuffPost/YouGov Poll .

The online poll found that 47 percent said it should be legal to grow marijuana, while 37 percent said it shouldn't.

Younger people were significantly more likely to back legalization of pot cultivation. About half of every age group under 65 said growing marijuana should be allowed, compared with 36 percent of those 65 or older.

A partisan gap was also in evidence -- 54 percent of Democrats , but 34 percent of Republicans -- supported legalization of marijuana growing. Independents, at 48 percent, were between members of the two major political parties.

The overall results are in line with an earlier HuffPost/YouGov survey that found 51 percent in favor of legalizing marijuana, and taxing it and regulating it similarly to alcohol. A separate poll by the Pew Research Center found legalized marijuana use gaining majority support for the first time this year.

While slightly less than half of the public approves of legalizing the growing of marijuana, according to the most recent HuffPost/YouGov results, 56 percent said it should be legal to grow hemp, an industrial form of cannabis that has no psychoactive ingredients, while 24 percent said it should not.

Twenty-three percent of those who opposed legalizing the growth of marijuana said they supported the hemp proposal.

A bipartisan amendment introduced this week by Sen. Ron Wyden (D-Oregon) would remove the federal prohibition on growing industrial hemp.

The poll was conducted May 22 and May 23 among 1,000 adults using a sample selected from YouGov's opt-in online panel to match the demographics and other characteristics of the adult U.S. population. Factors considered include age, race, gender, education, employment, income, marital status, number of children, voter registration, time and location of Internet access, interest in politics, religion and church attendance.

The Huffington Post has teamed up with YouGov to conduct daily opinion polls. You can learn more about this project and take part in YouGov's nationally representative opinion polling.