In what type of soil do azaleas typically flourish?

Azaleas thrive in acid soils that retain moisture, which is essential for their growth and flowering. These plants prefer a soil pH typically ranging from about 4.5 to 6.0, which is considered acidic. Acidic soils often contain organic matter and are rich in the nutrients necessary for azaleas to flourish. The moisture retention in these soils helps keep the roots hydrated, which is crucial for azaleas as they can be sensitive to both drought and overly wet conditions. Moreover, proper drainage is also important; while azaleas do need moisture, they do not do well in compacted or poorly drained soils that can lead to root rot.

In contrast, while clay soils may offer nutrients, they often lack the drainage required for azaleas to thrive. Alkaline soils can hinder the plant's ability to absorb iron and other important nutrients, which can lead to chlorosis (yellowing of leaves). Sandy soils, although they may offer good drainage, typically have a higher pH and lower nutrient content, which is not ideal for azaleas. Thus, the preference for acid soils that retain moisture aligns perfectly with the requirements of azaleas, making this the correct answer.