The warm temperatures in the soil and air that are maintained in a mini-greenhouse are beneficial to the germination process of seeds. The majority of mini-greenhouses come with pots or a plastic tray that stores the potting mix as well as a transparent plastic covering that lets light in and assists the soil in keeping its moisture level.
According to an article from the Seed Collection, these greenhouses are used within the vast majority of the time; however, it is possible to place them outdoors during sunny weather as long as the temperature is above freezing. After the seeds have germinated, the transparent covering will continue to let light in, simulating the conditions of a greenhouse during the early stages of the plant’s development.
1. Prep the Soil Mix
Depending on how the greenhouse is constructed, either the planting tray or the seedling pots should have sterile potting mix placed inside of them. Place the soil tray or the pots within the water tray after it has been filled with lukewarm water to a depth of one inch. After allowing the soil to absorb the water for at least half an hour or until the surface of the soil gets damp, clear the drip tray of any excess water that has accumulated in it.
2. Sow the Seeds
Plant the seeds of the plant in the soil mixture that has been watered to the depth that is stated on the seed package. This depth is often around twice the width of the seed and is given in millimetres. Plant two seeds in each container or planting cell, or sow the seeds with an inch of space between them in rows that are also spaced an inch apart in trays or flats. In the event that it is required, mist the top of the soil with water to further wet it after planting.
3. Cover the Tray
Place the greenhouse cover over the tray, and then position the mini-greenhouse in a spot that gets bright but indirect sunshine and has temperatures ranging from 65 to 75 degrees Fahrenheit. Because the cover enables the soil mix to retain moisture, it does not need any more watering until after the seeds have germinated.
4. Prop the Cover Up
After the seeds have begun to sprout, you should prop open the lid of the greenhouse so that any dampness may escape. To keep one end of the cover raised, you might make use of a thin stick or a pencil.
5. Water the Seedlings
When the top layer of soil seems dry to the touch, water the seedlings. Pour water into the drip tray to ensure that the soil will absorb the moisture from the bottom of the tray while preventing the seedling leaves from being wet, which may cause a fungal illness.
6. Remove the Cover
Take off the lid of the greenhouse entirely before the seedlings reach a height where they may brush against the plastic.
Things You Will Need
Planting tray or pots
Sterile potting mix
Small stick or pencil
Miniature greenhouses may be successfully created at home using disposable metal baking pans that are available with transparent plastic coverings. Make use of separate planting pots or cell planters to keep the soil and seed contained inside the container.
You also have the option of starting your seeds in the winter by utilising a transparent one-gallon plastic jug as a makeshift greenhouse, as stated in an article that was written and published by the Illinois Extension: After giving the jug a thorough cleaning, make drainage holes in the base, then cut around the circle of the jug approximately midway between the top and the bottom, leaving a half an inch of the circumference uncut so that it may act as a hinge. After you have sown your seeds, filled the bottom half with moistened potting mix, and taped the top half down, your miniature greenhouse is now ready to be taken outdoors.
Some miniature greenhouses are made out of shelves that have been coated with transparent plastic and may be used either indoors or outside. Open the door of these sorts of greenhouses or utilise the vents that have been placed to provide ventilation. If you want to use these greenhouses outside, you should install a thermometer and provide enough ventilation well before temperatures reach 80 degrees Fahrenheit. Extreme heat may be fatal to seeds and seedlings.