Several clumps of roses were planted in the garden.
Tips
usage
丛 functions both as a noun (a cluster/thicket: 丛林, jungle) and as a measure word for clumps of plants: 一丛花 (a clump of flowers), 一丛草 (a clump of grass). As a suffix it forms compound nouns: 丛书 (series of books), 丛林 (jungle/thicket).