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how to germinate seeds in a plastic bag

How to germinate seeds in a plastic bag

An activity for the Foundation Years to KS2 in order to observe seed germination.

Materials Needed

  • a few seeds
  • paper towel [school ones are ideal]
  • stapler
  • plastic bag [the A4 sized kind which seals at the top works best]
  • ruler
  • water
  • label

Instructions

  1. First, label bag with child’s name, date and seed name.
  2. Next, fold a paper towel so that it just fits inside the bag.
  3. Take a ruler and measure 7 cm from the top of the bag and staple a row of staples from one edge to the other through the plastic bag and paper towel. If you are using very small seeds then make the staples closer together. You will have a mini-pocket, 7 cm deep. This is where the seeds are going to sit.
  4. Next carefully pour enough water into the bag so that it will soak up through the paper towel but leave a small reservoir of water at the bottom of the plastic bag [about 2-3 cm].
  5. Then, take the seeds and put them in the mini-pocket so they are sitting on top of the line of
    staples.
  6. Seal up the seed bag so no air can escape or get into it. Tape it to a window or peg to a washing
    line strung across the classroom.

Within a few days depending on the time of the year the seeds will begin to germinate. Children can
clearly see the growth of roots and then the shoot. As soon as the young plants reach the top of the
sealed bag they can be carefully removed and potted up.

An activity for the Foundation Years to KS2 in order to observe seed germination.

How to Grow Seeds in a Plastic Bag

Related Articles

Small seedlings can prove challenging to sprout in the garden bed, since watering or rain may wash them away before they germinate. Growing the seeds in advance inside a plastic bag prevents this issue and helps speed germination. Plastic bag sprouting also allows you to test germination rates, which is vital if you are using saved garden seed or old seed from previous years. Germination time varies depending on the plant variety, but most sprout within three to 14 days.

Stack two paper towels on top of each other. Fold the towels in half and sprinkle them with water until they are completely moistened but not dripping wet.

Spread the seeds out on top the paper towel, covering only half the towel with seeds. Space the seeds so they are not touching and there is about 1/4-inch of space around each seed.

Fold the damp towel in half, sandwiching the seeds between the towels. Press lightly on top the towel so the seeds are in full contact with the towels on both sides.

Slide the paper towel into a plastic zip-top bag. Seal the bag closed to trap the moisture and prevent the towel from drying out.

Set the sealed bag in a warm area, such as on top the refrigerator, where temperatures are between 70 and 80 degrees.

Check the seeds every two days until the seeds begin to swell and the first short sprouts emerge. Sow the seeds immediately in a pot or prepared garden bed at the depth and spacing recommended on the seed package once they begin to sprout.

Things You Will Need

Plastic zip-top bag

Tweezers make it simpler to transplant sprouted seeds without damaging the tender sprout.

How to Grow Seeds in a Plastic Bag. Small seedlings can prove challenging to sprout in the garden bed, since watering or rain may wash them away before they germinate. Growing the seeds in advance inside a plastic bag prevents this issue and helps speed germination. Plastic bag sprouting also allows you to test …