Crafting your own terrarium is like building a tiny world of lush, thriving greenery — and who doesn’t love the idea of a self-contained slice of nature, right there on your shelf? Whether you’re looking to add a pinch of greenery to your interiors or want to try your hand at a beginner-friendly plant project, terrariums are wonderful go to.

This week's blog will walk you through everything you need to know, layer by layer, plant by plant, so you can put together a terrarium that’s not only beautiful but also almost effortless to maintain.  

Why Build a Terrarium?  

Terrariums are an incredibly stylish way to bring a splash of greenery indoors, but they’re also low-maintenance and space-saving. They’re perfect for plant parents living in smaller spaces or anyone with a busy schedule who still wants a little natural touch in their home. Plus, crafting one is an enjoyable project, tapping into your creativity while connecting with nature.

The Layers That Make It Last  

Building a terrarium is all about perfecting the layers. Every layer serves a unique purpose to ensure your plants stay healthy and happy for the long term. Here’s what you’ll need:

1. Gravel (The Foundation)

Start with a layer of gravel or small rocks at the base of your vessel — usually about 2-3 cm thick. This layer acts as a drainage area for excess water, keeping your plants from sitting in soggy soil (because nobody likes soggy roots!). Choose decorative stones for added visual interest.  

2. Activated Charcoal (Keeps Things Fresh)

On top of the gravel, sprinkle a thin layer of activated charcoal — about 1-2 cm. This superstar layer helps filter the water and air in your terrarium, reducing odours and preventing harmful bacteria or mould from developing.  

3. Moss (The Barrier)

To keep your soil from seeping into the gravel, use a thin, fluffy layer of moss, such as sphagnum moss. Moss adds visual charm while ensuring everything stays neat and tidy.  

4. Potting Mix (The Nutrient Base)  

Your soil layer is where the magic happens, so a high-quality potting mix is essential. Use a mix specifically designed for indoor plants, adding a splash of our Soil & Microbe Booster to enrich it with all the beneficial microbes your plants need to thrive. Aim for about 5-7 cm of soil, adjusted for the size of your plants’ roots.  

Choosing the Perfect Vessel  

Terrariums can be open or closed, and your choice should depend on the plants you want to grow and the look you love.  

Open Terrariums are ideal for plants like succulents and cacti that prefer good airflow and dryer conditions. Bonus — an open style often fits modern and minimal interiors perfectly.  

Closed Terrariums work for moisture-loving plants like ferns because they create their own mini-ecosystem that keeps the humidity high. Their glassy, lush aesthetic is a showstopper in any space.  

Best Plants for Terrarium Beginners  

Choosing the right plants for your terrarium is key! Here are some stellar options to get you started:
Ferns (e.g., Maidenhair, Lemon Button): Lovely and lush, ferns thrive in the high humidity of closed terrariums.  
Hypoestes (Polka Dot Plant): This playful plant has vividly spotted leaves and does well in humid setups.  
Peperomia: A hardy, compact option that’s available in a range of leaf shapes and colours.  
Fittonia (Nerve Plant): This low-growing standout with vibrant patterns loves the damp atmosphere of a closed terrarium.  
Succulents (for Open Terrariums): Try Jade plants, Echeveria, or Haworthia for a modern, desert vibe.  

Caring for Your Tiny Green World  

Even though terrariums are low-maintenance, they do need a little TLC every now and then.  

Watering  

The biggest mistake people make when it comes to terrariums is overwatering. Closed terrariums generally require minimal watering (think every 2-4 weeks) because moisture recycles itself inside. Open terrariums with succulents may need watering about every 1-2 weeks, depending on your environment. A good rule of thumb? Check the soil with your finger — it should be just barely dry at the top before you water.  

For closed systems, misting your plants lightly can often suffice. And don’t forget your water can work harder for you! Using distilled water or adding a small dose of Plant Runner’s Indoor Plant Food keeps your plants nourished while avoiding mineral build-ups you might get from tap water.  

Fertilizing  

Terrarium plants don’t need a lot of fertiliser. Over-feeding can lead to overgrowth, which might overcrowd your terrarium. Use Plant Runner’s Plant Food or another gentle liquid fertiliser, diluted as per instructions, once every 2-3 months. For small or slow-growing plants, less is definitely more.  

The Terrarium Builder’s Top 5 Tips  

To wrap up, here are five golden tips to make sure your terrarium is not just beautiful but also set up for long-term success.  

1. Layer with Love: Each layer (gravel, charcoal, moss, soil) serves a purpose, so take your time and make them count!  
2. Choose Compatible Plants: Group plants with similar light and moisture needs — batching a cactus with a fern is a recipe for disaster.  
3. Don’t Overwater: Less is more when it comes to terrarium watering. Keep it light-handed.                                                                                                                                        4. Trim and Tidy: A terrarium is a living art piece — trim overgrown leaves and remove decaying matter regularly.  
4. Location Matters: Place your terrarium in indirect sunlight. Too much direct light can cook your plants inside the glass!

And that's it! You’re ready to build your own terrarium. Whether it’s a gift for a plant-loving friend or your first step into the world of greenery, your terrarium will be a constant reminder of just how rewarding plant care can be. As always, we're contactable for any questions you might have so reach out to us anytime. 

Happy terrarium building! 🌿