what are some really fast growing plants from seed that will grow big in a small bedroom to look like a jungle

Answer 1

Chartreuse Philodendron Scandens 'Aureum'

Prayer Plant - "Erythroneura"

Learn more about these plants here - http://www.centralfloridafarms.com/indoor.htm

Before you try anything, it's better to go to a greenhouse to buy the seeds (in order to learn more about the requirements of these fast growing indoor plants).

Enjoy decorating your room with those plants. (Don't sleep in the room without no lights or opening to the outside - CO2 may be dangerous)

Answer 2

Australian silk oak is a neat tree that grows quite quickly from seed. The only reason I can think of that it isn't more popular as a house plant is that it grows SO fast that it quickly outgrows its spot and must be pruned..

Also, if you have lots of light, check out eBay for various banana bulbs. Extremely fast growing in good sunlight.

Answer 3

While I would NEVER advise anyone to intentionally or accidently plant one outside; air potato might be up your alley.

Climbing vine with large heart shaped leaves, produces "potatoes" along the vine.

Whatever you, don't turn it loose outside. Dispose of the "potatoes" with your garbage.