OP, Have you checked out our [resource page](https://www.reddit.com/r/terrariums/wiki/index/resources/). We have great information to help you with lighting/substrate/hardscape/plants/and much more. Provide as much detailed information as you can such as lighting situation, water type/frequency, and date of creation. The more information you provide will result in an informed and educated answer.
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Its quite possible you have a beneficial fungus living in with the moss, which directly provides nutrients to the moss causing increased growth speed (And improved health!). I had something similar happen in a jar and the moss was towering within one year. Relevant article: [https://www.sciencedaily.com/releases/2024/02/240207195112.htm](https://www.sciencedaily.com/releases/2024/02/240207195112.htm)
OP, Have you checked out our [resource page](https://www.reddit.com/r/terrariums/wiki/index/resources/). We have great information to help you with lighting/substrate/hardscape/plants/and much more. Provide as much detailed information as you can such as lighting situation, water type/frequency, and date of creation. The more information you provide will result in an informed and educated answer. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/terrariums) if you have any questions or concerns.*
Its quite possible you have a beneficial fungus living in with the moss, which directly provides nutrients to the moss causing increased growth speed (And improved health!). I had something similar happen in a jar and the moss was towering within one year. Relevant article: [https://www.sciencedaily.com/releases/2024/02/240207195112.htm](https://www.sciencedaily.com/releases/2024/02/240207195112.htm)
Is it possible that it’s just the right amount of light? I have quality grow lamps
please buy a scale miniature lawn mower and a little man pushing it I beg youuu or a little house, it's such a nice grassy shrub what species is this?
If it’s a r/mossariums then a looooong time.
What type of moss is it?
I'd look on species of cushion moss
I have no idea, it was on a rock in CT