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    • Photo of Silphium perfoliatum flower by Alan Lorence

    Photo by Alan Lorence

    Used with permission, all rights reserved

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    Silphium perfoliatum

    Also Known As

    • Cup Plant

    Plant type

    perennial

    size

    • H: 4'-10'
    • W: 2'-4'

    planting zones

    • 5a-10a

    More Options

    Silphium perfoliatum plant details

    Silphium perfoliatum is a broadleaf deciduous perennial with green foliage. In fall and summer yellow flowers emerge. Attracts bees and butterflies making it an excellent addition to pollinator gardens. Grows well with sun - mostly shade and even moisture - regular water. Does well in rich soil. A good option if you're seeking something heat tolerant.

    CHARACTERISTICS OF Silphium perfoliatum

    Plant type: perennial
    Plant family: lamiaceae
    Foliage: deciduous green
    Mature size: 2 FT - 4 FT - wide, 4 FT - 10 FT - tall
    Flowers: yellow blooms in fall and summer
    Uses: border plant, cutting garden, native plant

    GROWING CONDITIONS for Silphium perfoliatum

    USDA Zones: 5a - 10a
    Sun exposure: sun - mostly shade
    Watering frequency: even moisture - regular
    Resistant to: heat
    Soil needs: rich

    Nursery contributed plant descriptions

    Striking (to 10') and fascinating, this native ?sunflower? has pairs of large leaves which clasp the stem forming ?cups? where water collects and is enjoyed by hummingbirds!; said to tolerate some shade. S-PSh/M-Damp

    By: Forestfarm

    A must for attracting wildlife, this tall member of the Aster family, grows 4-8' tall bearing branches of 3" yellow daisies from mid summer to early fall. Commonly called Cup Plant because the middle and upper leaves lack petioles, and the leaves envelope the stem to form a little reservoir which holds water to nourish birds and butterflies. Especially attractive are the seed heads that follow in fall, resembling, in my opinion, little green ranunculus. This Silphium is rather easy to grown but loves a wet soil that has a neutral or slightly alkaline pH.

    By: Avant Gardens

    Cupplant (Silphium perfoliatum) is the single best species for attracting birds! It provides food, water and cover. The leaves clasp the stems to form cups that catch rainwater. Songbirds, butterflies and hummingbirds come for a drink, and in fall, goldfinches descend upon the plants to devour the seeds. Hardy to Zones 3 - 8.

    By: Prairie Nursery

    Massive perennial, reaching up to 8 feet with big yellow daisy flowers in the late summer. Though, of course, you'll probably need a ladder to get up and appreciate them. Called the cup plant, because the leaves form a neat little cup around the stem, which is rather cool, and after rains will hold water that birds will use as bird baths. Not a plant for a small garden, but just the thing if you need something big and coarse and over-the-top. Zone 3

    By: Arrowhead Alpines

    Large yellow daisy-like flowers on 7 ft square stems. Leaves are joined at the stem forming a cup on this North American prairie native. Robust.

    By: Dancing Oaks Nursery

    Gardening facts about Silphium perfoliatum plant

    How to Grow Silphium perfoliatum

    • Sun Exposure

      • sun - mostly shade

    • Water Needs

      • even moisture - regular

    • Soil Needs

      • rich

    • Special Situation

      • heat tolerant

    Features

    • Foliage Color

      • green

    • Flower Color

      • yellow

    • Wildlife

      • bees
      • butterflies

    • Flower Season

      • summer
      • fall

    • Foliage Season

      • deciduous

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