PJM Rhododendron Plant Profile
PJM Rhododendron (Rhododendron
hybrid) is an evergreen shrub with bold flowers early in the spring season.
It will also flower again in the autumn, though not as prolifically as the
spring flush.
The clusters of flowers are in shades of pink and purple. It
grows to a large mound that is about 5 to 6 feet high and wide. It is hardy to
USDA zones 4 through 8.
In the winter time, the PJM’s foliage turns purple-bronze
which curl up into a tight cylinder during periods of freezing temperatures.
Its namesake is Peter John Mezitt, a Latvian immigrant who
settled in Boston and opened the Weston Nursery there in 1923. PJM is a cross
between the very hardy Rhododendron
dauricum var. sempervirens from
the Mongolian borderlands and the native
Rhododendron carolinianum
PJM is one of the easiest and hardiest of the rhododendrons
to grow in our region as it is both heat- and cold-tolerant. It likes filtered
shade or morning sun and acidic soils, amended with lots of organic materials such
as leaf mold and pine bark.
It is sterile and does not set seed. It can be propagated by
layering or cuttings.
PJM Rhododendron: You
Can Grow That!
The
video was produced by Washington Gardener Magazine as part of our Plant
Profile series for Mid-Atlantic USA gardeners.
Video and editing by Jessica Harden
Audio and text by Kathy Jentz
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