These are the developments over the past month: I moved one of the avocado pits to a container with soil. Meanwhile, one of the avocado pits that I moved to soil earlier seems to be really healthy and is quickly gaining height (this is the plant I dubbed the "survivor" because it survived being dropped on its roots a few times, had its roots dehydrated, and endured other traumatic experiences). I now have two or three avocado plants that are healthy. The plant whose health is in question is actually the tallest (and the oldest) one I have, but for some reason its leaves are drooping, it is not producing any new leaves, and its pit is browning and crumpling in on itself. I don't know whether this is because it reached a critical age or if it's because the avocado is just unhealthy.
The apple plant is growing nicely. The strawberries, however, are growing rather slowly, and all but two died. On the bright side, I think I know why soil becomes hard (which I think caused some of my plants' deaths). Basically, soil can be either clayey or sandy. The clayey soil binds together with water and becomes hard, while the sandy soil does not. To prevent the soil from becoming hard, I would probably have to mix it with some sand. This would explain the glass or plastic-like pieces that are put in potting soil.
A few of the pepper plants died. Fortunately, I was surprised to see that when some of the plants lost all their leaves, their stems stayed green and firm. A couple of weeks later, they sprouted new leaves.
I planted a few new plants. The little ones are basil plants which I got from seeds. I also planted pumpkins, although they haven't sprouted yet. A few days ago, I plucked berries from what I think is a deciduous holly and an American holly. I planted the seeds from the deciduous holly, and will soon plant the ones from the American holly. Also, I planted a new batch of tomato plants, and tried to record their growth.
