Violas may not grow well in soil that is too compacted or lacks the proper nutrients. Poor drainage can also be a factor, as excess water can cause root rot and other issues. Additionally, soil pH can affect the growth of violas, with a pH level that is too high or too low inhibiting the plant's ability to absorb nutrients. To address these issues, amend the soil with organic matter to improve its texture and nutrient content, ensure that there is proper drainage, and test the soil pH to determine if it needs to be adjusted.
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