60-90 days to maturity. Dianthus plumarius ’Cottage Pinks’. Dianthus Cottage Pinks Flower Seeds. Non-GMO, open-pollinated, perennial flower. This late spring to mid-summer bloomer has a delightful clove scent when in full bloom. As a mat-forming perennial, Cottage Pinks Dianthus is perfect for densely filling in bare soil to prevent erosion and showcase their delightful blooms. This prolific bloomer requires minimal maintenance and is sure to be the missing touch to your perennial bed this year. About 23,000 seeds per ounce.