Which plant to plant?

Firstly. I've decided to classify the plants in Part B by the way they reproduce. This doesn't seem very relevant to my actual experiment, but it seems to be a very common way of classification of plants, so I suppose it should be alright.

For example, there are angiosperms, who are flowering plants.

So, according to this site I've found, many fruits and vegetables are sensitive to allelopathy. A few are: apple, apricot, avocado, banana, pear, cauliflower, broccoli, watercress, cherimoya and spinach But are these easy to grow in your own back garden? I don't believe that apples are....they grow on trees. So no.

But the easiest looking ones are lettuce, watercress, tomatoes....nasturtiums, which are actually a type of flower! So right now I have a flower for Part B.

Also, according to a gardening resource, spinach plants are particularly easy to grow, as well as carrots. So maybe I'll try those.