Senna artemisioides subsp. oligophylla 'Oligophylla' (Outback Cassia)

Senna artemisioides subsp. oligophylla (Outback Cassia) 'Oligophylla' yellow flower close up on green plant
Senna artemisioides subsp. oligophylla (Outback Cassia) 'Oligophylla' with yellow flowers and small green leaves.

Botanical name: Senna artemisioides subsp. oligophylla

Common name: Outback Cassia

Cultivar: Oligophylla

Family: Fabaceae

Subfamily: Caesalpinioideae

Origin: Australia

USDA Plant Hardiness MapSmall plant 2-5 ftSemi-shadeFull sunWatering: Moderate. Water when top soil feels dryYellow, orange flowers

Senna artemisioides subsp. oligophylla, also known as Outback Cassia, is a small shrub native to Australia. It has glossy green leaves and reddish stems, and boasts bright yellow flowers in the spring. After a few weeks, the orange-red seedpods are left behind, providing an attractive ornament to your garden. It can grow to be a couple of feet tall, making it suitable for those who have limited space.

This perennial flower is easy to care for and can tolerate a range of conditions. It prefers full sun to semi-shaded spots, and prefers moderate watering to keep its soil damp but not waterlogged. It can be grown in USDA zones 9-11, and it will flaunt its bright flowers from late April to June.

If you happen to live in a cooler place, Outback Cassia can still be enjoyed from the comfort of your home. You can make it grow indoors in a pot, however you'll need to provide it with some extra attention. Place your pot in a location that will receive between 2-4 hours of sunlight a day to replicate the conditions of its native environment. Keep the soil damp but not waterlogged, and feed it with a balanced fertilizer every few months.

Outback Cassia is a unique and versatile perennial flower, perfect for both experienced and novice gardeners. Its hardy nature, colorful bloom, and interesting seedpods make it a delightful addition to any garden.

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Senna artemisioides subsp. oligophylla (Outback Cassia) 'Oligophylla' yellow flower plant covering many stems
Senna artemisioides subsp. oligophylla (Outback Cassia) 'Oligophylla' yellow flowers cluster among numerous thin reddish stems.


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