Mystery Houseplant ID

[graylor]

I have no clue what these are. They do flower on rare occasions and have a tendency to sprawl. I'd like to cut them back to manageable proportions and get rid of the sickly looking parts, but I don't want to kill them.

Comments

[jenstclair]

Night Blooming Cereus.

Personally, I'd cut back all the dead bits and root the rest. It does get ungainly!

[squid_ink]

that's one cool looking plant

sadly there is NO WAY it would grow in my zone (5/6)

[amergina]

You can keep them as houseplants. But they do get pretty big eventually, even if you cut them back. The flowers are pretty cool, though.

[graylor]

Mine are houseplants--they'd never survive winters outside in my zone (7).

Nightblooming Cereus

[rhodielady_47]

I think you should cut it way back when you repot it--as in maybe ten inches tall. The cut-off bits should root quite easily so you shouldn't worry about losing your plant. Most cactus need a bit of fertilizer in the spring and summer and they need a winter dormancy season before they can flower again.
I think you should do some reading about this plant. There seems to be a lot of internet sites about it so perhaps you should start with wikipedia's entry.
Hope this helps.
:)