Day Of The Triffids - 1963 - 6/10

I dunno. Most folks use weed killer or a whacker, but I suppose a flamethrower works.
A spectacular meteor shower leaves over 90% of humanity blind.
There were also spores, which grow into huge carnivorous plants.
That can move! That fine dine on people!

A sliver of humankind were spared, undergoing eye surgery, caving, bored by astronomy.
Between masses of desperate folks and pesky sunflowers on steroids, they got their own problems.
The story zeroes in on the survivors, my preferred being the bristling, alcoholic lighthouse keeper.
I have always found the black and white version more sinister, eerier.