Thymus serpyllum


This common herb is an excellent green roof plant, providing year-round interest, including a wonderful aromatic scent. Great to use on a culinary roof, it is very drought tolerant. Flowers bloom in several shades of purple, from dark violet-blue to lavender or lilac-pink. Flowers attract butterflies and bees when in bloom. Foliage comprised of tiny leaves forms a low, dense mat that stays predominately green through the winter, although it may take on some hints of purple in the coldest months, or when stressed. Leaves are a soft dark green color and slightly fuzzy in appearance. They give off a sweet or minty aroma when crushed or in the summer sun. This plant will tolerate some shade. It will benefit from growing in a deeper soil profile or mounded green roof media, and will need regular watering to become established. Great plant to attract pollinators.


  • Botanical Name: Thymus serphyllum
  • Family: Lamiaceae
  • Plant Type: Hardy Perennial
  • Plant Usage: Ground cover, Accent
  • Hardiness Zone: 5
  • Foliage Color: Grey-Green
  • Flower Color: Shades of Purple
  • Bloom Time: Midsummer to Autumn
  • Winter Interest: Green Foliage, with Some Reddish Tint
  • Height: 4"
  • Spread: 18"
  • Light Requirement: Full Sun to Partial Shade
  • Origin: Northern Europe
  • Self Sowing: No
  • Shade Tolerant: Partial
  • Substitutes: Phlox subulata,

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