So I recently started a terrarium and after putting the pebbles and soil in, I found that there was only about 6 inches of space for the plants to grow upwards. I want to keep the plants looking nice and unobscured by the lid of the terrarium so I was wondering if I continue to clip back the plants, leaving them under 6 inches tall, will they be stunted or continue to be healthy as long as they are provided with proper growing conditions. In my terrarium I have a pink fittonia which has done well in the two weeks it's been in there, and two small peperomia puteolata, which I later learned would grow to be around 15 inches tall. Thanks in advance for any advice.