What is the growth habit of Hypericum calycinum?

The growth habit of Hypericum calycinum, commonly known as creeping St. John's wort, is classified as spreading. This perennial ground cover is characterized by its low, sprawling growth, where the stems tend to extend outward and root at the nodes, effectively creating a dense mat of foliage. This spreading nature makes it an ideal choice for filling in areas in gardens where you want to suppress weeds and add ground cover.

The other growth habit options do not accurately represent Hypericum calycinum. Climbing would suggest a plant that ascends or requires support, which is not applicable here. Columnar growth indicates a tall and narrow form, while upright would refer to a plant that grows vertically without spreading, both of which are not characteristic of this species. Thus, the classification as spreading is consistent with its growth behavior and ecological role in landscaping.