• Overview
    Light Needs:
    Partial to full sun
    Watering Needs:
    Water weekly, or more often in extreme heat, until established.
    Average Landscape Size:
    Reaches 18 in. tall, spreading 30 to 36 in. wide.
    Key Feature:
    Bold Red Flowers
    Blooms:
    Summer to Fall
  • Detail
    Botanical Pronunciation:kor-ee-OP-sis
    Plant type:Perennial
    Deciduous/evergreen:Herbaceous
    Growth habit:Mounding
    Growth rate:Fast
    Average landscape size:Reaches 18 in. tall, spreading 30 to 36 in. wide.
    Foliage color:Green
    Blooms:Summer to Fall
    Flower color:Red
    Garden styleCottage
    Patent Act:Asexual reproduction of plants protected by the Plant Patent Act is prohibited during the life of the patent.
    Companion PlantsYarrow (Achillea); Black-Eyed Susan (Rudbeckia); Coneflower (Echinacea); Blue Fescue (Festuca); Blanket Flower (Gaillardia)
  • Care
    Care Information
    Thrives in average to lean, well-drained soils. Water regularly during first growing season to establish an extensive root system. Reduce frequency once established in landscape; water containers when soil surface is dry. Remove spent flowers for a neat appearance. Cut back in fall after flowering is finished. May be divided in fall or early spring. Fertilize in early spring.
    Light Needs:
    <strong>Partial Sun / Partial Shade</strong>: These two terms are often used interchangeably to mean 3-6 (or 4-6) hours of sunlight each day. However, there is a difference.<strong>Partial shade</strong> typically means the plants will appreciate a more gentle exposure such as the weaker morning or early afternoon sun, with the emphasis on providing the minimum needed shade and sheltering from intense late afternoon sun. <strong>Partial sun</strong> typically means the plants <u>need</u> some direct sun, so the emphasis is on meeting the required minimum hours of sunlight, with filtered sunlight or shade the balance of the day.
Both are best with shelter from the harshest late afternoon sun. This shade could be provided by a structure, a wall, larger plants or tree(s).
    Partial to full sun
    Watering Needs:
    Water needs: Moderate
    Water weekly, or more often in extreme heat, until established.
  • History & Lore
    History:
    This selection is a North American native cultivar from breeder Darrell Probst of central Massachusetts, and is the result of ten years of hybridizing hardy Coreopsis. These improved perennial forms are evaluated for hardiness, extended duration of flowering, distinctive flower forms, improved disease resistance, vigor and improved plant habit. The red color of 'Mercury Rising' comes from Coreopsis rosea, a hardy perennial, not Coreopsis tinctoria, which is an annual and the parent of other red-colored varieties which are neither hardy in zone 5 nor long-lived perennials in warmer zones. C. 'Mercury Rising' is truly perennial, and has survived sub-zero temperatures and thrived in Zone 5 for three years.