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Tiarella cordifolia Cutting Edge
Proven Winners Introduction
  • Common Name: Foamflower
  • Cold Hardiness: Zone 4
  • Sun or Shade: part shade to shade
  • Bloom Time: spring
Tiarella cordifolia 'Cutting Edge' photo courtesy of Walters Gardens
Tricyrtis formosana Autumn Glow
  • Common Name: Toadlily
  • Cold Hardiness: Zone 4-9
  • Sun or Shade: part shade
  • Bloom Time: late summer to ealy fall
Tricyrtis 'Autumn Glow' photo courtesy of Walters Gardens
Trillium erectum
Trillium grandiflorum
  • Common Name: Wood lily
  • Cold Hardiness: Zone 4-8
  • Sun or Shade: part to full shade
  • Bloom Time: early spring
Trillium grandiflorum at Whitehouse Perennials
Trillium luteum
  • Common Name: Yellow Trillium
  • Cold Hardiness: Zone 4-8
  • Sun or Shade: part to full shade
  • Bloom Time: ealy spring
Trillium luteum photo at Whitehouse Perennials
Trollius Golden Queen
  • Common Name: Globeflower
  • Cold Hardiness: Zone 3
  • Sun or Shade: partial shade to sun
  • Bloom Time: late spring to summer
Trollius 'Golden Queen' photo by Suzanne Patry
Vernonia lettermannii 'Iron Butterfly'
  • Common Name: Ironweed
  • Cold Hardiness: Zone 4-9
  • Sun or Shade: minimum 6 hours of direct sun
  • Bloom Time: late summer to fall
Vernonia 'Iron Butterfly' photo courtesy of North Creek Nursery
Vernonia Prairie Princess
New from Proven Winners for 2026
  • Common Name: Ironweed
  • Cold Hardiness: Zone 3
  • Sun or Shade: minimum 5 hours of direct sun
  • Bloom Time: late summer to early fall
Vernonia 'Prairie Princess' photo courtesy of Proven Winners
Veronica longifolia Skyward Blue
New for 2025
  • Common Name: Spike Speedwell
  • Cold Hardiness: Zone 4-8
  • Sun or Shade: minimum 5 hours of direct sun
  • Bloom Time: late spring to early summer
Veronica longifolia 'Skyward Blue' photo Ball Seed Company
Veronica Skyward Pink
New for 2026
  • Common Name: Speedwell
  • Cold Hardiness: Zone 4-7
  • Sun or Shade: Minimum 4 hours of direct sun
  • Bloom Time: late spring with rebloom
Veronica Skyward Pink
Vinca Illumination
  • Common Name: Periwinkle
  • Cold Hardiness: Zone 4-10
  • Sun or Shade: part shade to shade
  • Bloom Time: early summer
Vinca 'Illumination' photo courtesy of Proven Winners
Yucca filamentosa
  • Common Name: Adam's Needle, Spanish Bayonet
  • Cold Hardiness: Zone 4-9
  • Sun or Shade: minimum 6 hours of direct sun
  • Bloom Time: mid summer
Yucca filamentosa
Yucca filamentosa Color Guard
New for 2025
  • Common Name: Adam's Needle, Spanish Bayonet
  • Cold Hardiness: Zone 4-9
  • Sun or Shade: sun to part shade
  • Bloom Time: summer
Yucca filamentosa 'Color Guard' photo Missouri Botanical Garden
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