Cassia biflora, also known as the Golden Cassia or Butterfly Cassia, is a beautiful flowering plant that requires moderate care. Here are some tips to keep it healthy:

1. Light and Location: Place your Cassia biflora in a spot where it can receive full sunlight for at least six hours a day.
2. Watering: Water the plant regularly, keeping the soil slightly moist but not waterlogged. Allow the top inch of soil to dry before watering again.
3. Soil and Fertilizer: Use well-draining soil and feed the plant with a balanced fertilizer during the growing season to promote healthy growth.
4. Pruning: Trim the plant to maintain its shape and remove any dead or damaged branches.
5. Pest Control: Monitor for common pests like aphids and caterpillars, and use appropriate organic insecticides if necessary.
6. Winter Care: Protect the plant from frost during winter by moving it indoors or providing a suitable covering.

Remember to observe your Cassia biflora closely and adjust care according to its specific needs.