Rhododendron catawbiense

Large species rhododendron

  • Flowering Time : May, June
  • Height in 10 years : 3 metres / 9 feet 10 inches


Extremely hardy, handsome dark green leaves. Funnel shaped lilac flowers, spotted yellow.May-June. This species is one of the parents of a great many hardy hybrids.

Flower Months

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Rhododendrons will start flowering around this time, depending on the season, for a week or so.


  • UK Zone : 7
  • RHS Zone : H (Fully Hardy)
  • EGF Zone : H1
  • US Zone : 4B
  • Min Temp : Colder than -29°C (-20°F)

Ironclads. These are the hardiest varieties suitable for the coldest areas suitable for growing rhododendrons, including parts of eastern Europe and much of inland eastern USA and Canada. Most are heat tolerant.