Cassia phyllodinea is a fast-growing evergreen medium-sized shrub that typically reaches 5 to 6 feet in height and width. It has limber branches that hold distinctive flattened 2 to 3-inch long silver-gray falcate (sickle-shaped) leaves. The leaves are often two-lobed near the tip and shimmer in the sunlight.
During mid to late winter through early spring, the plant produces showy yellow flowers, about 3/4 inch wide, in mass on branched terminal clusters. These flowers attract bees and butterflies. After flowering, the plant develops dangling papery brown seedpods that persist for months.
This species is native to dry inland plains on rocky soils in Queensland, New South Wales, South Australia, and New Territories. It is well-suited for hot, dry locations and is drought-tolerant, handling wind, high heat, and reflected heat exposures. It can thrive in full sun and well-drained soils.
Given its attractive features, adaptability, and low water requirements, Senna phyllodinea is an excellent choice for gardens in USDA Zone 9-12.
Growing Instructions
Scarify the Seeds:
Nick or sand the hard seed coat to allow water to penetrate the seeds. You can use sandpaper, a nail file, or an emery board to gently scratch the surface of the seed coat. Be careful not to damage the seed itself.
Soak the Seeds:
After scarification, place the seeds in a container and soak them in water for several hours. This will help to further soften the seed coat and encourage germination.
Prepare the Potting Mix:
Create a well-draining potting mix by combining equal parts of potting soil and sand, perlite, or vermiculite. Mix the components thoroughly to ensure good aeration and drainage.
Planting the Seeds:
Fill a pot with the prepared potting mix and water it until the mixture is evenly moist but not waterlogged.
Place the scarified seeds on the surface of the soil in the pot. Ensure there is some spacing between the seeds to allow enough room for growth.
Cover the Seeds:
Sprinkle a thin layer of the potting mix over the seeds to cover them. The layer should be just enough to bury the seeds slightly and promote proper germination.
Watering:
Gently water the seeds again after covering them with the thin layer of soil. Keep the soil consistently moist throughout the germination process, but avoid overwatering, as excessive moisture can lead to rot.
Placement and Sunlight:
Find a suitable location for the pots where they can receive ample sunlight. It prefers warm temperatures and thrives in full sun to part shade conditions.
Germination and Transplanting:
With proper care, the seeds should begin to germinate within a few weeks. As the seedlings grow to a few inches in height, they can be transplanted into larger containers or directly into the ground, depending on the season and climate.