If you new to marijuana, (below 3 months or so) than high quality, also known as "Chronic" marijuana can last all day. But if your an expert smoker, than it can last 6-10 hours, depending on what kind your smoking. Some chronic won't even last longer than normal. It's just made to get you higher much faster. Some chronic has been known to last all day, even to a lifelong smoker. But if your smoking hydro, purple haze or something like that, than the high will last about 6 hours or so.
about 5 minutes
marijuana stays in your system for 30 days. a high from maryjane usually last 5-6 hours
No.
hii
Not necessarily, however it does increase your high.
About 15 days.
Forever!
for about a hour
it will stay in there for about 2 years
90 days
just dont do it.
3 months