Day of the Triffids should be a yardstick for every movie ever made. Especially post-apocalyptic movies. I mean, if they could make such a great looking movie with 1960's tech and with 1960's money, then anything is possible. This movie kicks the crap outta movies that just came out last week. But, maybe I should explain?
The earth is showered with meteorites and of course almost everyone has to look at them in all their purtiness. Well, not only are these meteorites harboring evil carnivorous plants, but they make you go blind. Only the people who don't look at them are spared. I think the Stand ripped this concept off a little. You get a rag-tag bunch left over, drunks, sailors, a little girl... etc.
Well, then these Triffids (carnivorous plants) start moving around, multiplying and kicking serious butt. They are poisonous and they turn you green when before they eat you. It seems like there isn't going to be any hope, cause they are organized like the Borg or ants. At this point the characters in the movie should be thankful that War of the Worlds was ever realeased. Because it turns out that the alien's weakness is just everyday sea water.
This movie has a lot of the standard conventions that you see in post-apoc movies these days. Societies' fabric is torn to shreds and there are always roving bands of wrongdooers. In this movie, it is drunken convicts. In Dawn of the Dead it was bikers. Seeing a pattern, I took this to heart, so when the end hits, I'm hanging out at seedy bars to meet the future.