I did once, in a small closet cabinet like 40x40x100cm. But opened several times in a day. There was only air coming from backside from a little hole where the cable for bulbs coming in. Say 5 cm. max. And the bulbs were 1x100watt 2x 40 watt incandescent spots 24h on. Bagseed. 20 liter pot. 1:1 peat : perlit. No nutes. She grew out of the cabinet then i put her at the corner of the room, only top were open, still no vents. I showed sunlight time to time (almost everyday min. 2-3 hours sunlight and fresh air). After i sexed her light fixture fell on her and broke her from half. That was the end of adventure. All this happened in a month or 1,5. She was like 1 meter long, she was ok.

I don't recommend this to anybody! Conditions can be different in many ways.
tevfik Reviewed by tevfik on . how important is ventilation? can it mean the difference between a healthy plant, and a dead plant? I know that people generally want to supply their plant with fresh air, but I would like to hear from someone with some real experience with that. Would a plant die if you kept it in a closed grow-closet, and only opened it every day or two? It's just that my intuition goes against the notion that plants can consume that much air. My intuition wants me to believe they consume miniscule amounts of air. Rating: 5