How to Care for a Terrarium: A Beginner’s Guide

How to Care for a Terrarium?

To care for a terrarium, it is important to consider whether it is closed or open.

Closed terrariums create a self-sustainable ecosystem and should be placed away from windows or in a spot with indirect light.

The condensation inside the closed terrarium should be up to a third of the jar’s height, and excess water should be removed if necessary.

Open terrariums, on the other hand, should be placed on windowsills or tables in full or partial sun.

Succulents and cacti in open terrariums should be watered weekly from March to October, and every six weeks during winter.

Pruning can be done by trimming back plants touching the sides and cutting straggly stems down to a healthy leaf joint.

Sick plants can be revived by removing excess water, trimming dead leaves or stems, and moving the terrarium to a shadier spot if needed.

If the moss looks faded, adding a spoonful of water can help, while any mold should be wiped off and the lid left open for five minutes.

Key Points:

  • Closed terrariums should be placed away from windows or in a spot with indirect light
  • Condensation inside closed terrarium should be up to a third of the jar’s height
  • Excess water in closed terrarium should be removed if necessary
  • Open terrariums should be placed on windowsills or tables in full or partial sun
  • Succulents and cacti in open terrariums should be watered weekly from March to October, and every six weeks during winter
  • Pruning can be done by trimming back plants touching the sides and cutting straggly stems down to a healthy leaf joint
  • Sick plants can be revived by removing excess water, trimming dead leaves or stems, and moving the terrarium to a shadier spot if needed
  • Faded moss can be refreshed by adding a spoonful of water
  • Mold should be wiped off and the lid left open for five minutes.


Did You Know?

1. Did you know that the first terrarium was created by accident in 1829? Nathaniel Bagshaw Ward, a British physician and botanist, accidentally left a glass container with plants in it near a moth cocoon. To his surprise, a fern and grass grew inside, leading to the invention of the terrarium.

2. In the 1970s, the popularity of terrariums grew so much that it became a fashion trend. People would wear small glass capsules with live plants or miniature landscapes as jewelry, allowing them to carry a piece of nature everywhere they went.

3. While terrariums are commonly associated with plants, some people create miniature ecosystems with animals as well. Known as “paludariums,” these unique creations combine aquatic and terrestrial elements, allowing for the coexistence of amphibians, reptiles, fish, and plants within the same enclosure.

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4. Terrariums are often used as educational tools in schools, museums, and science centers. These miniature landscapes provide an opportunity for students to learn about ecosystems, observe plant growth, and understand the importance of maintaining a balanced environment.

5. Believe it or not, NASA has embraced the concept of terrariums for space travel. As part of their Biosphere 2 project, they designed sealed ecosystems capable of sustaining human life and even growing food. This research helps scientists understand the dynamics of Earth’s ecosystems and explore the potential for future space colonization.

Creating A Self-Sustainable Terrarium

One of the fascinating aspects of closed terrariums is their ability to create a self-sustainable ecosystem. To achieve this, you need to start with a sturdy glass jar or container that allows for adequate air circulation. The first step is to create a drainage layer at the bottom of the terrarium using pebbles or small rocks. This layer will help prevent root rot by allowing excess water to drain away from the roots.

Next, add a layer of activated charcoal on top of the pebbles. This charcoal helps filter the air and prevents any unpleasant odors caused by trapped moisture. Afterward, it’s time to add a layer of potting soil, ensuring it is deep enough to accommodate the roots of your chosen plants.

Now is the exciting part – planting your terrarium! Select plants that thrive in humid environments, such as ferns, mosses, and small tropical plants. Place them strategically, considering their growth patterns and ensuring they have enough space to spread out. Finish by gently watering the terrarium, being careful not to overdo it as excess water can lead to mold and rot.

Choosing The Right Lighting For Closed Terrariums

Closed terrariums thrive in indirect light, making them a perfect addition to areas away from direct sunlight, such as bookshelves or desks. Placing them near a window could cause excessive heat and result in overheating the terrarium. To avoid this issue, opt for a location that receives bright, filtered light without exposing the terrarium to direct rays.

In closed terrariums, the glass acts as a greenhouse, trapping humidity and creating a warm and moist environment. This unique characteristic enables the terrarium to sustain itself with minimal water requirements. The glass should have adequate condensation, typically up to a third of the jar’s height. If you notice excess condensation, simply open the lid for a few minutes to allow air circulation and evaporate the excess moisture.

Ideal Placement For Open Terrariums

Open terrariums require a different approach when it comes to lighting. They thrive in direct or partial sunlight, making windowsills or tables near windows an ideal location. Ensure that the plants receive at least four to six hours of sunlight each day to maintain their health and vibrant colors.

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While open terrariums don’t retain moisture like closed ones, it’s important not to neglect watering. Succulents and cacti, commonly found in open terrariums, require water weekly from March to October. During winter, reduce watering to every six weeks. It’s crucial to monitor soil moisture levels and adjust the watering frequency accordingly to prevent root rot or dehydration.

  • Open terrariums thrive in direct or partial sunlight.
  • Place them on windowsills or tables near windows for optimal lighting.
  • Provide at least four to six hours of sunlight daily.
  • Succulents and cacti in open terrariums need weekly watering from March to October.
  • Reduce watering to every six weeks during winter.
  • Monitor soil moisture levels to prevent root rot or dehydration.

Managing Condensation In Closed Terrariums

As mentioned earlier, closed terrariums should exhibit condensation up to a third of the jar’s height. If condensation is lacking or excessive, it is necessary to adjust the terrarium’s environment. If you notice an absence of condensation, it might indicate insufficient moisture levels. To address this, add a spoonful of water to the terrarium and monitor the condensation levels over the next few days.

On the other hand, if mold develops on the glass or plants, it’s essential to act promptly to prevent its spread. Wipe off the mold using a clean cloth or cotton swab, and ensure the lid is left open for at least five minutes to allow fresh air circulation. If the mold persists, consider removing the affected plant as it may indicate an imbalance within the terrarium’s ecosystem.

Proper Pruning Techniques For Terrarium Plants

Regular pruning is crucial for maintaining the aesthetics and health of your terrarium. Over time, plants may grow too close to the sides of the container, hindering air circulation and potentially causing mold or disease. To prevent this, use scissors or tweezers to carefully trim back any plants that touch the sides.

Additionally, terrarium plants may develop straggly stems or wilted leaves. In these cases, it’s best to trim them down to a healthy leaf joint. This will encourage the growth of new, healthy foliage and help maintain the overall appearance of the terrarium.

Reviving sick plants in a terrarium requires a thoughtful approach. If a plant appears to be struggling, start by removing excess water from the container and allowing the soil to partially dry out. If dead leaves or stems are present, carefully trim them to promote new growth. If the issue persists, consider moving the terrarium to a shadier spot, as excessive sunlight might be causing stress to the plants.

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Caring for a terrarium is a rewarding experience that can bring a touch of nature into any space. By following these instructions and paying attention to your terrarium’s specific needs, you can create and maintain a thriving ecosystem that brings joy and beauty to your surroundings. So, why not embark on this green journey and begin nurturing your own tiny garden?

Frequently Asked Questions

How do you take care of a terrarium for beginners?

To care for a terrarium as a beginner, it’s crucial to place it away from direct sunlight to prevent overheating and drying out of the plants. If you notice that the soil feels dry, water the terrarium up to three times per week, adjusting the frequency based on how the soil feels. In the summer months, you may need to provide a bit more water to ensure the plants remain hydrated. Remember to strike a balance between watering enough to keep the terrarium moist but not excessively wet.

How often do you water a terrarium?

The watering frequency of a terrarium depends on its type and design. In the case of closed terrariums, watering is typically done once a month, although this may vary due to different factors. On the other hand, open terrariums thrive when watered every 3-6 weeks, but it is important to assess the soil’s moisture level before providing water, instead of sticking to a fixed schedule. By checking the soil regularly, you can determine the exact amount of water required by your terrarium plants, ensuring their optimal growth and health.

How do you care for a closed terrarium?

To care for a closed terrarium, it is important to maintain a stable and suitable environment. Avoid placing the terrarium near extreme heat sources such as radiators or stoves, as this can dry out the plants and harm their growth. Similarly, during colder months, keep the terrarium away from air conditioners or windows to prevent unhealthy chilling effects. Instead, aim for a warm and humid atmosphere to ensure the well-being of the plants within the closed terrarium.

Do terrariums need full sun?

Terrariums thrive in bright but indirect sunlight, making it essential to provide them with a spot near a bright window that is not directly exposed to sunbeams. Placing them near a north-facing window is particularly beneficial. It is important to ensure they receive approximately 4 to 6 hours of indirect sunshine daily. Avoid moving the plants around to chase or evade the sun’s rays, as this can disrupt their growth and overall health. Instead, find a permanent location that offers the right amount of brightness for your terrarium to flourish.

References: 1, 2, 3, 4

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