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The largest, roundest leaves

Tiarella River™ Delaware

Delaware has the largest, roundest leaves with subtle, deep purple markings. Delaware is surprisingly very drought tolerant.

From the superior breeding genetics of Sinclair A. Adam, Jr. , we bring you another fine addition to The River Series of truly East Coast native foam flowers. Delaware has the largest, roundest leaves with subtle, deep purple markings. Delaware grows four to six inches tall and spreads to18 inches wide in one season. Prolific, deep pink blooms from late April to June are held high above the foliage on dark red stems. Delaware's three by three inch leaves often fool visitors to my garden who think they are non-hardy begonias. The velvet leaves and the deep, purple-black venation becomes more pronounced as the foliage matures.

The semi evergreen foliage refreshes itself in early April and is then complemented by deep maroon stems holding medium pink buds that open to bi-color pink and white blooms held high above the foliage. Each bloom lasts four to six weeks and gives way to even larger, more boldly colored foliage that remains green and fuzzy until a good, hard frost when the transformation to fall and winter foliage begins. Fall foliage for Delaware begins deep maroon and finishes a lovely tawny color. As true winter weather appears, the tawny colored foliage remains until Spring, when brand new, deep kelly green, very fuzzy foliage emerges from the crown and the cycle begins all over…

Please note: We don't sell plants. Asking your local retailer or googling the plant name is the easiest way to find someone selling our plants.

Please note: Download hi-res photos from the photo gallery at the bottom of the page.

Who Am I?

  • Common Name

    Delaware foam flower
  • Botanical Name

    Tiarella cordifolia 'Delaware' PP21980
  • Type

  • US Native?

  • Bloom Time

    April to June
  • Bloom Color


Cultural Details

  • Bloom Time

    April to June
  • Size

    4-6″ tall by 18-24″ wide
  • Hardiness Zone

  • Light

    full to part shade
  • Soil

    average garden soil
  • Moisture

    would love to have moist, organic soil, but also grows well in dry soil with lots of rot competition.
  • Disease & Pests

    none known
  • Landscape Use

    dry to moist shade, shady slopes, stream banks, shade containers, shade hanging baskets.
  • Propagation

    Cuttings, Tissue Culture

Available Photos

Hover over images to download hi-res files.