The primrose is fully hardy and a hugely popular autumn bedding and container plant.
Cultivated varieties come in a wide range of colours with both single and double flowers. There are more than 500 species in the genus Primula, including auricula, cowslip and oxlip.
HTA consultant David Gilchrist said: "There are a great range of colours available in this hardy group of plants, from bright yellow to pastel reds and blues.
"They can be used very effectively in bedding schemes alongside tulips and other winter/spring bedding plants and look stunning when planted in big blocks of colour.
"They can be planted in containers, winter baskets and garden borders. They can grow in most soil types and can be planted in many garden situations including sun and semi shade."
New 2012 Plant of the Month point of sale materials can be purchased through HTA partners Hortipak and Floramedia.
The plants included within Plant of the Month have been nominated and agreed by the HTA Ornamentals Committee and the HTA Retail Management Group to ensure the campaign meets the needs of both growers and retailers.