Cassia, also known as senna, is a commonly grown in butterfly gardens. The shrub produces vibrantly coloured flowers, usually yellow, and long seed pods. Cassia is a low-maintenance plant that is considered invasive in some areas, so only encourage the growth of native Cassia plants in your region.
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Things you need
- All-purpose fertiliser
- Garden shears
Plant cassia in a site that gets a eight hours of full sun every day and has well-drained soil. Avoid planting cassia in valleys, ditches or creek bottoms.
Apply an all-purpose fertiliser to the soil once a month during the growing season. Follow the package directions for application rates. Do not apply the fertiliser to the cassia foliage, or you may burn the leaves.
Allow the soil to dry out between waterings. Cassia plants are very drought tolerant and do not thrive when waterlogged. When the soil is dry, water enough to make the soil moist to the touch 2 inches below the surface.
Prune young cassia plants to a main trunk, using garden shears. Select the strongest leader branch and cut the competing leader branches away at the branch collars. Prune cassia in the winter when the tree is dormant.
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