5′ -15ºF ML 4/3/3-4
Very deep red flowers have brown blotching on the upper lobes. The deep green foliage is tolerant of sun, and the plant will grow as wide as tall.
Rhododendron Notes
After the name of each rhody or azalea, we have listed a series of numbers. First is the size of the plant in 10 years. Then, hardiness ratings in degrees Fahrenheit. Bloom times in our area:
- VE- Jan-April 1
- E- April 1-May1
- EM- May1-May15
- M- May 15-June1
- ML-June 1-June 15
- L- June15- July 1
- VL- July 1- Aug
Our descriptions also include American Rhododendron Society ratings when possible. The three numbers (i.e. 3/4/4 ) rate the flower, plant, and performance in the garden. A ‘5’ is an excellent, but uncommon, rating. ‘3’ ratings are common, but a lower rating does not mean the plant is not worth growing. ‘-/-/-‘ indicates a rhododendron that has not yet been rated by the ARS.
“Rhododendron ‘Wilgen’s Ruby’” is licensed under CC BY-SA 4.0 
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