Mine seems to be happy, she is planted in bark & I follow the following advice I got from a web page:
Culture: Oncidium Sharry Baby 'Sweet Fragrance' needs a well drained compost and full to partial sun. In the greenhouse, we use compost consisting of Osmunda or tree fern fiber, with sphagnum moss and small bark chips added to ensure good drainage. The plants are watered and allowed to dry before adding water again. We fertilize the plants weekly with an orchid special fertilizer during the growing season. Plants do best with morning sun and afternoon shade. In the greenhouse, we started growing them in full sun and the leaves tended to produce brownish spots. After moving the plants to a new shaded location this stopped. The plants should never be subjected to temperatures lower than 60°F (15°C) at night. During the winter months, water is restricted to watering plants only enough to keep the pseudobulbs from shriveling.