Answer:
The following is MY answer! You can use it, but please paraphrase it so that it doesn't count for plagiarism!
Explanation:
MY ANSWER: The properties of the soil are different. Because one soil is more basic and the other is more acidic, the different chemicals/ compounds/ properties of the soil make the plants growth different. The reason the flowers have different colors is because the flowers have been grown using different kinds of soil.
The key points they want you to have: