19 October 2008

The Boy's Experiment, or, the Wonders of Compost

The Boy had an assignment to do for Science class: he had to take two jars, plant seeds in each, and then add compostable materials and a worm (if he could find one) to one jar, and leave the other as a control.

Here are his observations:

(Describe what you smell and see, measure the height of the plant, count the number of leaves and describe their shape and colour.)
Week 1
Jar 1 is the one without compost, jar 2 has compost. Jar 1 has 2 small sprouts and smells like dirt. Its 2 plants are 13mm and 2mm. Jar 2 has 3 small sprouts and smells like apples as I added left over apple skins to it. Jar 2’s plants are 13mm, 2mm, and 1mm. Jar 2 also has a worm.
Week 2
Jar 1 has 1 plant now which is 11mm tall and it still smells like dirt. Jar 2 has 2 plants and they are 30mm and 27mm tall and smells like compost. All of the plants have three leaves that look pretty green (see Jar 2 week 3 for best leaf picture). Jar 2 also now has some eggshells.
Week 3
Jar 1 smells like plain old dirt and now has 6 leaves and grew to 20mm tall. But the other two in jar 1 are far ahead at 60 and 50mm tall with 10 leaves each. It smells like compost still and all the leaves are very green. We also found out we are growing carrots.
Week 4
Jar 1’s sprout grew to 35mm and it still smells like dirt and has 6 leaves. Jar 2’s are 90 and 120mm tall with 13 and 18 leaves. It smells like fresh dirt and plants and the leaves are not purple; they're still green.

The pictures tell an amazing story of their own:

Compost works!


  1. Anonymous12:22 pm

    What a great experiment!! I always wondered if compost really helped

  2. Anonymous4:40 pm

    That is very cool!!! We have had vermicomposting worms for a few years now but would never have thought of adding worms to a plant.

    Thanks for sharing!!


Comments have been opened up for immediate posting - the spam filters seem to be doing their job pretty well, thankfully. I love hearing from you, thanks for taking the time to post a comment!