Once you learn how to craft a terrarium, you'll wonder why you waited so long to start. It takes about an hour to assemble your first one, and the materials are minimal.

Glass jars, fish bowls, or even candy jars can serve as perfect homes for your DIY terrariums. Mini plants are affordable, making this a budget-friendly gardening activity.

Creating a terrarium is a fulfilling, low-maintenance indoor gardening project, and these charming displays add a delightful natural touch to your decor.

Geometric Terrarium Container

(Image credit: Diego Bernal / Alamy Stock Photo)

Crafting a Terrarium in 5 Simple Steps

Terrarium plants thrive in various containers, provided they are correctly set up. Different plants require different types of environments; for instance, succulents need drier conditions compared to moisture-loving varieties.

"A terrarium creates a controlled environment for plants with enough moisture, light, and air flow," says a houseplant specialist.

Follow these straightforward steps to make a terrarium and showcase your favorite mini plants.

 James Kinsella headshot

A horticulture expert with over 15 years in the field emphasizes plant care and terrarium design.

Woman holding jar with succulent plants

Succulents flourish in open terrariums, which are less prone to condensation and fungal issues compared to closed varieties.

(Image credit: Prostock-studio / Alamy Stock Photo)

Materials Needed:

  • A glass or plastic vessel
  • A layer of gravel or small stones
  • Terrarium soil at Amazon
  • Activated charcoal
  • A selection of mini plants suitable for terrariums
  • A spoon for placing soil
  • Long tweezers for positioning materials
  • Moss and decorative elements

1. Select the Perfect Container

Person watering a terrarium

A spacious glass design is a great choice, making watering simpler.

(Image credit: Dorling Kindersley: Rob Streeter / Getty)

Choosing the right container is crucial for your first terrarium project. You'll find plenty of options, from large glass jars to fish bowls. Some plants prefer a closed environment while others do better in an open space.

If you're working with succulents, a slanted glass bowl is ideal since they thrive better when not enclosed.

Ensure the container is adequately sized for your plants and is clean and dry before starting. Plastic containers also work well, offering lightweight options that are easy to handle.

Explore Terrarium Container Options

A classic large jar is great for beginners. The wooden stopper keeps the environment sealed.

This upside-down style uses the lid as a base for your plants, making it slightly more challenging to manage.

For a decorative touch, choose a unique container design that suits your style.

2. Add Gravel or Pebbles at the Base

Adding gravel to the base of a large glass jar terrarium

Using a funnel can help with filling the terrarium without creating a mess.

(Image credit: Dorling Kindersley: Rob Streeter / Getty Images)

Begin by adding a layer of gravel or polished pebbles to the bottom of your container. This layer aids in drainage and prevents plant roots from sitting in excess water.

"The base layer of small rocks acts as a drainage system," explains an expert in plant care. "Aim for a depth of 1-2 inches for the gravel layer."

Following the gravel, consider adding a thin layer of activated charcoal to filter air and inhibit mold growth.

Aaditya Bhatta headshot

A horticulturist with a decade of experience provides insights into plant care and terrarium maintenance.

3. Layer with Appropriate Potting Soil

Gravel and soil layered up in a large glass jar terrarium

Choosing the right soil type is essential for your terrarium's success.

(Image credit: Getty Images / Dorling Kindersley: Rob Streeter)

Opt for soil specifically designed for terrariums, avoiding regular garden soil that may contain unnecessary fertilizers. Cococoir, peat moss, or houseplant soil are good options, especially for non-succulent plants.

"For succulents, a well-draining mix is necessary," advises an industry expert. Ensure the soil layer is about 2-3 inches deep to accommodate your plants' roots.

4. Arrange Your Plants

Terrarium plants being added to a large glass jar terrarium

Try grouping plants together before planting to visualize the final design.

(Image credit: Dorling Kindersley: Rob Streeter / Getty Images)

Select plants suited for terrariums, like ferns, mosses, and small succulents. Consider mixing different types for a vibrant look.

Start by planting the largest plant first and work from back to front, allowing for creative arrangements. Dig a hole in the soil for each plant, carefully removing them from their pots and loosening the roots as needed.

Once positioned, add more soil around the plants to secure them. For decorative flair, top with gravel or small stones.

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An expert in various gardening methods shares tips on plant arrangement and care.

5. Add Decorative Touches

large glass terrarium filled with plants

A layer of fresh moss enhances the visual appeal of your terrarium.

(Image credit: Dorling Kindersley/Rob Streeter Getty Images)

Once your plants are arranged, it's time for decoration. Add pebbles, shells, or tiny figurines to personalize your terrarium. You can even create a seasonal theme with festive ornaments.

A layer of live moss looks lovely, especially when combined with sand and stones, and it requires minimal maintenance. Use a mister or a small watering can to gently moisten the plants.

Finally, if your design has a lid, close it, and your miniature plant ecosystem is complete.

FAQs

How to Create a Mason Jar Terrarium?

Making a mason jar terrarium is straightforward. Keep in mind the limited planting space when selecting plants and decorations.

The materials required are minimal: a jar, soil, plants, and moss, along with any decorative items you like. You can either plant directly in the jar or invert it for a unique approach.

Here's a quick method for planting in the lid:

  1. Ensure both the mason jar and lid are clean and dry.
  2. Gently remove the chosen plant from its pot.
  3. Place the plant in the lid, covering the roots with soil.
  4. Add a layer of moss around the base of the plant.
  5. Decorate with small ornaments.
  6. If inverting, carefully position the jar over the plant, ensuring no leaves are damaged, then twist the lid shut.
  7. Position your terrarium in bright, indirect light and check the soil moisture regularly.

If you want to add a unique twist to your indoor gardening displays, consider learning how to care for air plants.