Old man's beard is a hybrid of two New Zealand native evergreen plants. Its abundant white flowers and dwarf size make it a popular garden ornamental available in many cultivars. It is toxic to pets and humans and can irritate the skin. The species name "cartmanii" honors the hybridizer Joe Cartman, who developed this cross between Clematis paniculata and Clematis marmoraria.
Water:
Old man's beard thrives in well-drained soil and exhibits moderate drought tolerance, needing watering every three weeks. It prefers a balance of moisture and dry periods, and as a deciduous climber, it benefits from careful watering during its active growing season for optimal growth and flowering.
Fertilize:
Fertilizer application for old man's beard depends on its size. Use nitrogen during growth and phosphate from bud appearance to bloom. Potassium should be consistently applied. Fertilize with diluted solutions. In dormancy, add organic fertilizer and compost to enhance nutrients and protect roots from frost.
Pruning:
Old man's beard should be pruned before flowering or between late winter and early spring to improve growth and flower appearance. For late bloomers, heavy pruning (up to one-third height) encourages healthy branches, while early bloomers require more care. Pruning half of the branches promotes longer blooms.
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