Landscape Plants of the Upper Midwest

Preston Lilac

Plant Information

  • Plant Type: Shrub: Large
  • Scientific Name: Syringa x prestoniae Play audio of plant name
  • Family: Lilac
  • Related Cultivars:

    Syringa x prestoniae 'James McFarlane'
    Syringa x prestoniae 'Donald Wyman'
    Syringa x prestoniae 'Minuet'
    Syringa x prestoniae 'Miss Canada'

  • Zone: 3
  • Plant Size: 8-10'
  • Bloom Time: Spring
  • Habit: Rounded
  • Culture:

    Very adaptable. Full sun.

  • Notes:

    Flowers in late May-early June. Numerous cultivars range in flower color from red to violet to white. These lilacs are highly susceptible to a disease believed to be an MLO(mycoplasma-like organisms) which cause yellowing, stunting, dieback and eventual death: the U.W. Madison Arboretum's extensive lilac collection contained 36 cultivars of this hybrid in 1985, at present only 4 remain.

  • Pruning:Pruning animation

    Renewal pruning is accomplished by removing the largest, oldest stems (generally 1/4 to 1/3 of the total stems) as close to the ground as possible. This will stimulate new shoots to develop below the cuts which will fill in the plant creating a more dense and pleasing habit.

    Renewal pruning should be done when the plant is dormant, late fall to early spring.

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Landscape Plants of the Upper Midwest

Bill Hoch, Associate Professor
Montana State University

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