Senna artemisioides is a woody shrub to 3 metres tall with a silvery appearance created by short white hairs on the branchlets and leaves. The leaves are pinnate with 4-8 pairs of leaflets. The pinnate leaves of this form are about 2-4cm long and are narrowly cylindrical, grey green or silvery, 1-4 cm x 0.2-0.3 cm.
The high and low range of moisture indicates it can grow with varying amounts of water. Once established, feathery cassia grows well on monthly deep water from July to October.
Established plants can benefit from fertilization. Take a visual inventory of your landscape. Trees need to be fertilized every few years. Shrubs and other plants in the landscape can be fertilized yearly. A soil test can determine existing nutrient levels in the soil. If one or more nutrients is low, a specific instead of an all-purpose fertilizer may be required. Fertilizers that are high in N, nitrogen, will promote green leafy growth. Excess nitrogen in the soil can cause excessive vegetative growth on plants at the expense of flower bud development. It is best to avoid fertilizing late in the growing season. Applications made at that time can force lush, vegetative growth that will not have a chance to harden off before the onset of cold weather.
Feathery senna must have a well-drained soil to sustain landscape performance. ... Frequent shearing of feathery senna will negatively impact spring floral displays as this plant sets flower buds in August for flowering the following February. Propagation: Seed, hot water soak or acid scarify.
Lightly, soon after flowering. The fullest bloom occurs when the plant is allowed to grow "spiky" after spring trimming. New flower buds set in August. Pruning after August eliminates flowering the following winter.
Senna artemisioides, the wormwood senna, is a species of flowering plant in the pea family Fabaceae. It is endemic to Australia, where it is found in all mainland states and territories.
