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How to Make an Herb Terrarium for Under $15

Yesterday, my girls and I were wandering around the Wal-Mart (we'd gone in for one thing, but it always happens) when I saw a large glass jar. I didn't see a large empty jar on the shelf; I saw a lush terrarium.

how to make a terrarium

So of course, I bought the jar and a couple of herbs. The Wal-Mart didn't have any house plants, only herbs and annuals.

After poaching my garden shed, I made the prettiest terrarium ever.

Or maybe it's just the prettiest one I ever made.

Either way, it's nice.

I have been bitten by a terrarium bug. I want to make a sandy desert cactus terrarium next, but I have to wait til I get another allowance. (Have I explained that yet? Joe and I have been giving ourselves a $20 allowance every other week.)

How to Make a Terrarium for Under $15

how to make a terrarium

Herb terrarium materials:

The first thing you need to do is find a big glass or jar or bowl. You can make it a closer container, but that's more complicated. We're going for easy here, so stick to something that is open at the top: a shallow glass dish, a fishbowl, a big jar, whatever. My whole project was inspired by this $7 jar at Wal-Mart (in the floral crafts section).

Next, you need some plants. I got these two herbs (rosemary and lemon verbena, chosen because they smell nice separately and together) at Wal-Mart for $3 each. The puny parsley in the rocks at the top of the photo is a freebie. I “won” it at a community event last week.

You'll also need some gravel. I found my gravel in the garden shed. It smelled awful, but it was free. If you have a gravel driveway, go get some gravel from there. If you don't have a garden shed or a driveway, you could buy gravel in the fish section of the pet store or any big store.

You will need something to keep the soil from falling into the gravel. I was thinking that some sphagnum moss would work well, but I didn't want to pay for it. I didn't have any old screens lying around, either. So I decided to make do with what I had, the mesh bags that the rocks came in. If you're not using bags of rocks, you could try the bag that onions come in or even pantyhose or something like that. The key is that the water goes through but most of the soil does not go through.

It didn't make the picture (because I didn't want it on my dining room table), but you will need some soil. I recycled the peat moss and soil mixture that was in some of my flower pots from last summer and added a little fresh potting soil from a bag in the garden shed.

You'll probably want some moss. I intended to dig some moss out of last year's mulch pile (that is sadly still in the end of the driveway), but I remembered that I'd purchased some for the now deceased hermit crabs. I found that in the destined for Craigslist stuff in the garage. Don't go buy moss. You can easily find it in the woods. Go dig up a handful.

Lastly, you'll need some decorations for your terrarium. I only had $15 left in my allowance, so my decorations budget was $2 (as I'd already spent $13 on the jar and plants). I found two bags of black river stones at the Dollar Tree store. At home, I got a few big seashells out of the destined for Craigslist hermit crab stuff and determined to make them work.

How to assemble your terrarium:

how to make a terrarium with moss

This is like step zero. That moss I found was dormant, so I soaked it in an inch of water (in an old mushroom container, if you're wondering) while I did the other steps. It greened up quickly.

how to make a terrarium

1. Carefully place about 2 inches of gravel in the bottom of your container. Because you're using a glass or otherwise impermeable container, you have to put something in the bottom that will allow the soil to drain instead of sitting in water. Plants that are sitting in waterlogged soil will quickly die, so you need the soil to drain.

how to make a terrarium

2. Dump the rocks out into a container and stuff the bags into the jar. Try to cover all the gravel with the screen or mesh or moss.

how to make a terrarium - plant the herbs

3. Arrange your plants in the container, on top of the mesh. I picked lemon verbena because I liked the way it smelled, and then I picked rosemary because its leaves are very different from the lemon verbena, and I liked the way they looked and smelled together.

Honestly, the only reason that I threw the parsley in was that it was sitting around looking spindly. I'm glad I did, though, because the third plant rounds out the terrarium nicely.

These plants came in large peat pots. If I'd set the peat pots down inside the jar, they would have stuck out the top. I may have tried that, actually.

I tore the peat pots into large sections and laid those on top of the mesh bags. The peat pots will eventually break down, but for now, they're helping to hold the soil where it belongs.

I tried a couple of different arrangements of my plants. You'll have to experiment and move them around until you get them the way you like them.

Once you're sure the plants are where you want them, spoon extra soil into the jar. Use your hands to firm the soil around the plant roots, then smooth it out so that it's relatively level.

how to make a terrarium

4. Planting moss is really complicated. You lay it on top of the soil and then – Wait, that's all you do. Just lay the moss on top of the soil where you want it. I had to tear my moss in half as to not knock over the spindly parsley.

how to make an inexpensive terrarium

5. The last step is optional. Put your decorations in the terrarium as you see fit. I used my black river stones to cover up the soil in between the plants and the moss. Grace decided that we should have some seashells on top of the moss, so I let her put them where she wanted.

how to make an inexpensive terrarium

6. Before you quit, water your plants. Watering them right away moves the soil around their roots and helps them to grow in their new container.

And that's it! Enjoy your new terrarium.

how to make a terrarium with herbs

Have you ever made a terrarium? What did you put in it?

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© 2012 – 2017, Tara Ziegmont. All rights reserved.

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32 thoughts on “How to Make an Herb Terrarium for Under $15

  1. I’ve been reading up on terrariums myself a lot lately….hadn’t thought of using herbs though…have to add that to my list of terrarium ideas.

  2. I am cursed to live without a green thumb, but I just love terrariums. You’ve given me hope that maybe even I can manage one of these. They are so homey!

  3. Found this because I have a few fishbowls lying around that I wanted to plant in but was afraid to out herbs in a container that didn’t drain the water. Thanks for posting this, I’ll definitely have to try it!

  4. Thanks!! I am going to be using this as part of my homeschooling lesson this week. Using herbs is better because now she will be able to tie it all together, science and home economics. 🙂

  5. Do terrariums need much light? I have tinted windows in my home that reflect the sunlight light. So it’s not very bright inside my home.

      • Now that I know you can grow plants in low light, I think I will give it a try. I have cats and think maybe growing plants inside a glass bowl might be the way to bring some greenery inside my home without my cats being able to try and eat them. Thanks!

  6. I really want to try building a terrarium. I have a big glass vessel. Actually looks looks like a big brandy brandy glass. My question is that it is green in color. Would that make a difference. If so, how? Thank you. I not I am still going to do it. Just means a trip to the dollar store. Thanks again.
    Elaine

    t

    • I’ve never tried to build a terrarium in colored glass, but if I were you, I would give it a try. The worst that would happen is that the plants don’t thrive, in which case, you can get another container and transplant them. You wouldn’t be out anything.

  7. Hi, I have tried numerous ways including this ideal to grow herbs. I find the plants just do not survive. I have other terrariums with tropical plants and they are perfect. What am I missing?

    • I don’t know what the problem could be. Are you keeping them too wet perhaps? I’ve never had any trouble with growing herbs this way, though I do have to be a little stingier than normal with the water because they tend to like drier soil.

  8. I love this idea, and am really inspired by this! What is the size of the container? I don’t want my plants to be cramped!

      • The container I ended up using is definitely smaller, after the first repotting, the lemon verbena may have to be moved somewhere else… 🙂

        I loved this idea, and wish I could send you a picture of my own variation!

  9. Yes! I was hoping I could keep my herbs in hanging terrariums all winter so we have fresh herbs indoors! Are yours still thriving then?

    • You may be able to do that if your plants are small enough. My lemon verbena was much too big for my little terrarium and didn’t do very well a few months after I planted it. Then I accidentally left it outside on a fall night and it got frosted. So no, no longer alive.

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