NonInvasive Alternatives

1
Non-Invasive Alternatives

• Invasive ornamental plants and their native
  alternatives

2
Japanese Knotweed Polygonum species

• Goats Beard (right)
• Aruncus dioicus
• Perennial native, has cream colored flowers that
  bloom from June to July and grows up to six feet
  tall

3
Japanese Knotweed Polygonum species

• Fothergilla (right)
• Fothergilla major
• Deciduous shrub, with fragrant white flowers that
  bloom in spring. Large, five inch leaves have a
  colorful fall display

4
Japanese Knotweed Polygonum species

• Robusta Clumping Bamboo (right)
• Fargesia robusta
• Clumping Bamboo grows 15 to 20 feet tall, and
  maintains foliage through the winter season.
  Unlike knotweed, it does not spread

5
Purple Loosestrife Lythrum salicaria

• Gayfeather or Blazing Star (right)
• Liatris spicata
• Perennial, purple spikes bloom from July to
  September. Unlike Loosestrife, gayfeather likes
  well drained soils

6
Purple Loosestrife Lythrum salicaria

• Douglas Spiraea (top)
• Spiraea douglasii
• Deciduous, grows 3 to 6 feet in height with tall
  spikes of clustered pink flowers that attract
  butterflies, bees and other beneficial insects

7
Purple Loosestrife Lythrum salicaria

• Large leaved lupine (top)
• Lupinus Polyphyllus
• Herbaceous perennial, grows 4 to 8 feet in height
  and has tall spikes of vibrantly colored flowers

8
Purple Loosestrife Lythrum salicaria

• Wilsons Ligularia (top)
• Ligularia wilsoniana
• Wetland perennial, spikes of yellow flowers bloom
  mid to late summer and grows to 4 feet in height

9
Butterfly Bush Buddleja davidii

• California Lilac (right)
• Ceanothus Victoria, Dark Star, Julia
  Phelps, Blue Mist,
• Evergreen shrub, drought tolerant with a
  preference for welldrained soils. Blue, fragrant
  flowers bloom throughout spring

10
Butterfly Bush Buddleja davidii

• Chaste Tree (right)
• Vitex agnus castus
• Deciduous shrub, grows 10 to 15 feet high and 15
  to 20 feet wide. Fragrant blooms begin in late
  summer to fall, prefers full sun

11
Butterfly Bush Buddleja davidii

• Pacific Ninebark (top)
• Physocarpus capitatus cultivars
• Deciduous shrub, grows 12 to 15 feet in height
  and blooms white flowers in late spring to early
  summer. Similar to Butterfly bush, the bark is
  shaggy and ornamental