Question
I have a wooden terrarium 16"x24"x16" with a hinged lid, a sheet of glass at the front, a 4" hole on top with 1/4" wire mesh on top (for grow light) and (4) 1/2" inch holes near the top corners (for ventilation. Sorry i don't have a picture, but is this suitable for CPs? (I live in a temperate climate, if that helps)

Answer
I recommend against using a terrarium; they are challenging and problematic, and in most cases encourage fungal and bacterial infection. Light loving plants such as Venus Flytraps will thrive much better outside a terrarium, even if grown under artificial light. In natural sunlight, an enclosed terrarium can very easily and quickly overheat even to the point of killing the plants, and sunlight entering the growing medium and root zone can just as easily damage the roots.

Regarding humidity, Venus Flytraps and most carnivorous plants adapt well and easily to low humidity, and high humidity is usually not mandatory.

A terrarium, if used, must either be drained (have holes in the bottom) or the water must be removed and refreshed regularly. A constantly wet environment will promote disease, and most carnivorous plants prefer and are healthier in a growing mix ("soil") that is granular and airy, with a fairly high percentage of materials such as perlite or silica sand (not river nor beach sand), perhaps 50% of either or a mix of these ingredients, with 50% sphagnum peat moss or carefully and completely desalinated coir (coconut husk pith).

For many reasons not to use a terrarium for carnivorous plants, as well as some expert advice from those who do use terrariums, please visit and register at an online carnivorous plant forum, such as either or both of those listed below.

FlytrapCare.com Forum
http://www.flytrapcare.com/phpBB3/

CPUK Forum
http://www.cpukforum.com/

Additional information about anything mentioned here, and persons eager to answer your questions, are available at either of the websites above.

Thank you for the question and best wishes.