Pot smokers need to be aware that just because you can legally buy recreational marijuana in Massachusetts doesn’t mean you can bring it back to New Hampshire without consequences.

Seacoastonline reports that the difference in possession laws between the states is vastly different.

You can head down to Alternative Therapies Group in Salisbury, Mass. and legally purchase marijuana, but once you bring it across the state line to New Hampshire, the differences are huge.

Just because you purchased the pot legally won’t help you.

Although New Hampshire laws are liberal, any amount of marijuana is illegal in the state.

Possession of more than three-quarters of an ounce could result in a misdemeanor or even a felony depending on the circumstances involved, according to seacoastonline, and even a smaller amount in New Hampshire is unlawful.

According to seacoastonline, other things to remember are you can’t smoke marijuana in your car ANYWHERE legally, you cannot smoke it in any public place, you must be 21 to purchase it and driving under the influence of marijuana is unlawful EVERYWHERE.

And if you think you can purchase it under 21 from a dispensary, you are in for a rude awakening.

Alternative Therapies Group has two police officers stationed outside their door checking IDs and have a scanner to detect fake ones, the article reports.

It is unclear when New Hampshire law will change, so know your facts before you light up.