Well…hard to brign this up, but cacti and succulents don’t do well in humid environments, and maintaining humidity is about the main reason you’d make a terrarium for. Pretty. But these plants will rot pretty soon.
OMG this would be the perfect anniversary present for my husband!! He used to have an aquarium but it leaked out water one day b/c the glass cracked and I know he misses it a lot! Since then, we’ve been a little bit too busy to upkeep a whole aquarium so this would be the perfect replacement! These are soo adorable!!
I think ferns and moss terrariums would be much easier to maintain as they can better tolerate wet feet and require less sunlight(which may be important as a glass terrarium can get quite hot in direct sun).
Cacti grow well without a terrarium as they like plenty of sunlight and do not require the humid environment that is present in most terrariums.