Comparing the growth rate of cress seeds sown 4, 8, 16, 32, 64, 128, 256 in a petri dish. Each day, we looked at and compared the heights of the tallest plant as they germinated and grew.. Conclusion: the best cress for eating was in the 256 as they were the tallest. Healthy eating, too.
Other things being equal, does the presence of other plants from the same species affect the growth of individual plants in a predictable fashion?
Starting Procedure:
- Obtain a set of six petri dishes Put an inch or two of tape on each pot as a label and label each petri dish with the number and type of seeds to be planted in each plus something to identify them as yours. Use pencil as the pots will be sprayed regularly with water and left in sunlight. Ink can fade and wash away but the pencil marks should persist.
- Fill each petri dish with cotton wool.
- Plant either 4, 8, 16, 32, 64, 128, 256 seeds in each petri dish Do your best to space them evenly over the dish
- The plants will be watered and tended for the next several days.
- Once the plants have germinated measure their growth at the same time each day.
Try another experiment using the same number of seeds but this time half are mustard seeds and the other half are cress. Make sure to mix them.
How do the results compare?
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