How to Make a 2 Liter Bottle Mini Greenhouse

Whether for seeds or beginning houseplant propagations, a greenhouse is a great way to give whatever you’re planting the best start. To make a super simple mini greenhouse using items you probably already have on hand, follow these directions for how to make a 2 Liter Bottle Mini Greenhouse. It’s really easy to do, and your plants will thank you for the humidity.

How to Make a 2 Liter Bottle Mini Greenhouse

Why Start Your Plants in a Greenhouse?

Whether you’re starting seeds from houseplants or starting seeds for outdoors, a greenhouse is the perfect place to start your seeds. Sheltered from any outside elements, a greenhouse contains ideal conditions for seeds to grow, with plenty of humidity and heat. Also, a greenhouse is a great way to give those baby houseplant propagations the humidity they need to grow big and strong, too.

How to Make a 2 Liter Bottle Mini Greenhouse

In this case, our 2 liter bottle mini greenhouse is an easy, inexpensive method to giving whatever you’re planting the best start. It doesn’t take a lot to make these greenhouses and would even be fun to do with kids to get them involved with plants. It’s fun to watch the babies grow!

How to Make a 2 Liter Bottle Mini Greenhouse

Place the mini greenhouse near a windowsill to get good sunshine. Plastic wrap is fastened over the top of the bottle to seal in moisture that seeds need to grow. With these mini greenhouses and ideal conditions, it should only take a few days to see seeds begin to sprout.

How to Make a 2 Liter Bottle Mini Greenhouse

The below directions show how to start seeds in these greenhouses. However, you can follow the same idea for propagations. Propagations, however, will not need high humidity for long. Once your propagations have taken root, be sure to remove the top of the greenhouses so your cuttings can continue to grow.

2 Liter Bottle Mini Greenhouse Supplies Needed:

  • empty and clean 2 liter bottles
  • x-acto knife
  • plastic wrap
  • rubber band 
  • soil
  • seeds
  • spray bottle filled with water
  • optional: plastic tray

Directions for how to Make a Mini Greenhouse

Cur our middle part of bottle.

Using the x-acto knife, cut the middle part of the 2 liter bottle out and discard.

On the bottom of the bottle, cut a few drain holes using the knife. You’ll want the top portion of the bottle to fit just enough into the bottom portion to create the greenhouse.

Fill bottom with soil, poke holes for seeds.
Spray seeds with water.

Fill the bottom portion of the bottle with soil. Poke 1-3 holes into the soil for the seeds. Place a seed into each hole. Use the spray bottle to moisten the soil enough with water. 

Cover the top portion of the bottle with a piece of plastic wrap and secure with a rubber band. Place the lid on top of the bottom portion of the greenhouse.

Set near a window.

Set the mini greenhouses near a window sill that gets good sunshine. Use a tray underneath if desired. Observe over a few days. 

Seeds beginning to sprout.

After a few days, you should see the seeds sprouting. 

Seeds sprouting.

If you do not see any seeds sprouting, you can try planting another until you get a sprout. Seeds not sprouting could be from just bad seeds, diseased seeds, etc. 

How to Make a 2 Liter Bottle Mini Greenhouse

Once plants reach a certain height, you can transfer to a bigger pot and continue to watch grow.

There are so many benefits to starting your seeds in a greenhouse. A simple diy mini greenhouse like our 2 liter bottle mini greenhouse is a great way to make sure your starts are successful and growing for a long time to come.

2 Liter Bottle Mini Greenhouse

How to Make a 2 Liter Bottle Mini Greenhouse

Make your own simple mini greenhouse with a 2 liter bottle

Prep Time 15 minutes
Active Time 35 minutes
Total Time 50 minutes
Difficulty Medium

Materials

  • Empty and clean 2 liter bottles
  • Plastic wrap
  • Rubber band 
  • Soil
  • Seeds
  • Spray bottle filled with water
  • Optional: plastic tray

Tools

  • X-acto knife

Instructions

  1. Using the x-acto knife, cut the middle part of the 2 liter bottle out and discard.
  2. On the bottom of the bottle, cut a few drain holes using the knife. You’ll want the top portion of the bottle to fit just enough into the bottom portion to create the greenhouse.
  3. Fill the bottom portion of the bottle with soil. Poke 1-3 holes into the soil for the seeds. Place a seed into each hole. Use the spray bottle to moisten the soil enough with water. 
  4. Cover the top portion of the bottle with a piece of plastic wrap and secure with a rubber band. Place the lid on top of the bottom portion of the greenhouse.
  5. Set the mini greenhouses near a window sill that gets good sunshine. Use a tray underneath if desired. Observe over a few days. 
  6. After a few days, you should see the seeds sprouting.

Notes

  • If you do not see any seeds sprouting, you can try planting another until you get a sprout. Seeds not sprouting could be from just bad seeds, diseased seeds, etc. 
  • Once plants reach a certain height, you can transfer to a bigger pot and continue to watch grow.
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