Bottle Greenhouse – see easy instructions and make a mini greenhouse

Years ago Johanna Merinen saw a picture of a greenhouse made of a glass bottle and thought that a bottle greenhouse could function even made of a plastic bottle. The only problem is the shakiness of the plastic bottle when the bottom of the bottle is cut off. The problem is solved by making a skirt on the bottle.

“The flange makes the bottom of the bottle smoother, and the bottle more polar. Lieve sucks in mold and anchors itself to the ground, making it more secure, especially if the bottle is used outdoors, ”says Johanna.

He holds together Veikko Parviainen with Omavarainen.fithe site where he has told of greenhouses made from bottles.

Also read: Johanna and Veikko from Helsinki decided to buy an abandoned house without amenities

The bottle greenhouse is suitable for pre-growing and out to protect seedlings

Johanna uses bottles a lot in pre-breeding indoors. The bottle greenhouse creates good growing conditions for sowing, as it keeps moisture and heat better inside. It also provides protection.

“We have cats, and cats are unnecessarily interested in growing seedlings.”

In a mini-greenhouse made of bottles, it is advisable to pre-grow plants that need even heat and moisture during the sowing phase. Johanna has grown tomatoes, peppers, eggplant, cucumbers, sponge cucumbers and squash, as well as pineapple and blueberry. Seedlings that grow in height rather than width are especially suitable under the bottle.

Photo: Jovelan Johanna /

Read also: The sowing calendar tells you when to sow the seeds – see the right times, then sow directly into the ground or pre-grow as seedlings

The mini-greenhouse protects the seedlings planted out from temperature fluctuations and garden pests

Outdoors, the most important thing is to make sure that the heat inside the bottle does not rise too high and that the moisture does not stand in the bottle so that the plants do not mold.

To protect the bottles in a toasted place, you can tune the screen, for example, from sticks and frost.

“The first summer I forgot the bottles and it became hot and a few seedlings sniffed.”

Excessive moisture is usually removed by lifting the bottle off the ground with sticks so that air can also enter the bottle from below.

Once the bottle starts to be cramped and the plant needs space, the bottle greenhouse can be taken away. Once removed, the bottle can be difficult to get back on top of the seedling without damaging the seedling, especially if the seedling is wide.

When you no longer need the bottles, rinse and dry them and then stack to wait for the next growing season. The bottles last for many years. The oldest bottles used by Johanna are five years old.

Bottle greenhouse outdoors

Photo: Jovelan Johanna /

Accessories for the bottle greenhouse

  • a plastic bottle such as a soda bottle
  • carpet knife or knife
  • frying pan
  • folio
  • gauze, scissors and rubber band (if you use bottles outdoors to protect seedlings against pests)

Bottle Greenhouse: Help

  1. Cut out the bottom of the bottle with a carpet knife, for example.
  2. Heat a frying pan, and protect it with a piece of foil. Any frying pan works, but a cast iron frying pan is best because the heat stays in it longer and you don’t have to heat the pan all the time.
  3. Gently press the bottle into the foil until the plastic softens. The purpose is not to crush the plastic, but to heat the plastic only for a moment so that it can be molded.
    Diy bottle greenhouse

    Photo: Jovelan Johanna /

  4. Place the warmed bottle on top of any convex container, and push the bottle inward to form a slight bottom. Allow the bottle to cool and the greenhouse is ready.
  5. Diy bottle greenhouse

    Photo: Jovelan Johanna /

  6. If at any point the greenhouse needs extra height, cut the bottle and tape the center of the other bottle to the center of the original bottle. If the seedling starts to grow out of the mouth of the bottle, it can be difficult to get the bottle out without damaging the seedling.
  7. If you take the bottle out, loosely attach the gauze to its mouth with a rubber band. For example, press the gauze with your thumb inside the bottle before attaching. Watering is easier when the gauze sinks inside the bottle. The gauze protects against pests.

Source: Puutarha – by

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