We're pretty into plants around here and have a lot of experience with succulents and container gardens. Beautiful terrariums keep popping up online and out in the world and we've been lusting after them, wanting to make one but for some reason found the whole idea of building a terrarium a little daunting. It seemed like you needed all sorts of fancy stuff and...magic? But last week we finally took the plunge and started small, creating a sweet little terrarium out of a jar we found at the salvation army:

Gather Your Supplies:
- a jar or other container that is mostly contained
-some rocks
-charcoal (this is the fanciest ingredient)
-some dirt
-some plants
-options: some moss
Assemble:
This is the easy part. Once you have your supplies, lay some rocks in the bottom of your container. These are for drainage. Then sprinkle in some charcoal. This helps absorb the decaying matter that will be created within the terrarium. We got ours at the nursery, so you don't need to make any special trips for it. Then sprinkle in some soil and start planting. We chose succulents for our little guy and relied on using cuttings from plants we already had around. We decided to add some decorative moss to make it feel more terrarium-y (and we found it at OSH, so you don't have to go out of your way to find it).
We watered it and sealed it up. It's been about 10 days and we haven't needed to add any more water, though we did undo the latch because the condensation was starting to get out of control. The jar is sitting on a desk with medium light and seems to be doing well. Next we plan to try some larger scale terrariums!
What had your experience been with enclosed terrariums?
Comments (27)
I love this idea! Thank you.
P.S. What kind of dirt/soil did you use?
I used cactus soil because it's sandier and will drain better!
I planted a terrarium months ago and haven't ever watered it. The ferns and polka dot plants are still doing fine.
I've planted several over the years and I always manage to kill them off. I'm not sure what I do wrong but all my terrariums end in death and destruction. I tried one with prehistoric looking plants and some dinosaur figures... it smelled awful within a couple weeks. /sigh. I have the black thumb of doom I swear
geek--the charcoal is supposed to help with the smell, maybe you need to use more?
What a great way to let plants coexist peacefully with cats...
Will any kind of charcoal do? I'm looking for permission to smash up the stuff we BBQ with. I hope I didn't embarrass myself too thoroughly with this question.
Don't use succulents in a closed terrarium. They like low humidity areas and will rot from the excess humidity.
In closed areas use ferns and high humidity tolerant plans.
Succulents do best in open containers so moisture does not build up. They still rarely need to be watered.
Thanks, Kiljoywashere. I was going to plant a cactus!
In regards to succulents, they need air circulation, so an enclosed terrarium would not work. They need light and air, neither of which they will get while enclosed. Also, they would be susceptible to mealy bug.
same question as mwzoe - what kind of charcoal? where do you buy it?
Thanks!
What a great idea, even if you have to leave the lid open! I've actually got one of those kilner-type of jars that's just a little past it's purpose and currently stuffed under the sink, doing nothing... I also invested in a packet of bamboo charcoal to use to filter water. Can't tell you how good it is yet as I still need to get a jug for it (I suppose I could be thrifty and use that jar but it really is too grotty!). However, one of the many uses for spent charcoal is in gardening so... after I have finally exhausted my precious lumps, I could crush them and finally plant up my own little jar...
anything else to use besides ferns?
I learned this the hard way recently. Succulents do not like a closed-jar environment. You should leave the lid open so that it can dry out. You also might want to put a lot of pebbles at the bottom to keep the roots of the succulents from being wet (or they will rot).
absea - make sure NOT to use easy light charcoal - that stuff is full of lighter fluid (aka gasoline). It will kill the plants.
Charcoal – you should be able to buy this at a garden store (sometimes called 'activated' charcoal or carbon), but I just bought an aquarium filter and cut it open.
I used to have a coffee table terrarium I made from a fishtank filled with fishbone ferns topped with a sheet of glass. You need to be careful not bark your shins on the glass overhang, though =Bo(
Site for charcoal: shopterrain.com
This site is awesome. They have a terrarium starter kit. I have it and can attest to it being a real value. I could not find charcoal anywhere else. Also, Terrain sells adorable terrarium sized plants. They are not online, but if you call them, they may ship them to you. They are located in Glen Mills, PA. Half of an hour outside Philadelphia, across the street from the Brinton Lakes shopping strip. I don't work for them! I've been to their store and I am a fan! Someone told me it is Anthropologie's plant store. Yeah, that's cool.
I have a lovely terrarium that has been doing very well with basil this year. I've had it forever and usually use it to start seeds-works great with humidity tolerant plants and since herbs don't like wet feet, they need lots of drainage, I've done the best with those! Good luck y'all!
A great place to look for containers to do this in is Marshalls. We picked ours up for $12. My daughter wanted it to be a "home for a gnome" so we chose plants that had appropriately scaled foliage and plucked some moss out of the yard, then added a few small rocks to make it look like more of a natural setting in miniature.
Here it is:
http://www.kitschykitten.com/2010/05/11/tuesday-night-crafty/
I have a small open fish bowl I would like to use, what kinds of plants should I use? I also have some mini mason jar's (almost 3 inches tall and 2 inches in diameter) that seal up nice and tight, I was thinking I could put just one plant in each then stack them up, that would be neat.
Hla21, we used a small money tree, some angel plants pruned to look like tiny trees, assyllum, and live moss.
I saw a few succulent terrariums on the web and decided to give it a whirl. I'm glad I did because it's very theraputic and I view my plantings as living sculptures.
It gets expensive, so I started selling some of them at open air markets and local shops in Dallas. I love creating them and I am sad to let some of them go.
my flickr photos
This is a great idea and I appreciate all the helpful advice. I too have a black thumb but the tips are giving me hope ...
I made 6 last night for gifts. It was easy. The hardest part was not putting too many plants in. Make sure there is enough room for roots vertically.
i bought the most AWESOME container today, it is like a glass house , has patina, so cool. I know I'm suppose to use charcoal but i don't wan to buy a whole bag of charcoal. Any suggestions?
Charcoal -- could you cut open a used Brita water filter and use the charcoal out of that?