RubiconRubicon is a hybrid rhododendron with vibrant flowers. Very rich red rounded trusses come alive against the dark textured foliage and can bloom for months. We recommend partial shade and watering once a week as needed, and watch for blooms as early as March. We can't recommend this rhododendron enough and think that you will love it as much as we do. Rubicon can grow to 5' tall at maturity and is hardy to 5F when protected from windchill.