Answer: Primroses are difficult to grow well in our hot summer climate. It is better if they can receive just a few hours of early morning sun and/or bright dappled light all day, in part because this helps keep their location cooler. (A location with six hours of direct sun is considered full sun.) They also need an organic, humusy soil that is evenly moist yet well drained, meaning not soggy or saturated. So, unfortunately, heavy clay would not be suitable. If you really like primroses, you might grow them as cool season annuals in a container or specially amended bed, then replace them with a summer annual once the primroses begin to fail.
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