Bougainvillea ‘California Gold’ is a free-flowering, vigorous, evergreen shrub or vine with clusters of warm golden yellow, papery bracts surrounding tiny creamy-white flowers. It is one of the top performing yellow Bougainvillea varieties. The plant is moderately-vigorous and can grow up to 15-30 ft. (4.5-9 m) if left unpruned. The flowers are borne on stems clad with short thorns and dull, wavy-edged, ovate green leaves. They do not cling and may require tying for support. Bougainvillea ‘California Gold’ thrives in full sun or light shade, in acid, well-drained soils. It tolerates hot, dry locations fairly well but dislikes constantly wet soils. It has good drought tolerance once established but will look better if watered during dry spells. Fertilize every two weeks during the growing season. This plant is an excellent choice for mass plantings, as specimen plants, wall-side borders, groundcovers for banks, in rock gardens, and containers. It can also be espaliered or trained on a standard or grown in a large basket. Regular pruning may be required to keep inbounds or shape the plant. Always prune this plant immediately after flowering. Be aware that repetitive pruning may reduce flowering as this plant flowers on new growth. Pinching the tips of new growth will encourage branching. Cuttings 4-6 in. long (10-15 cm), put under mist, will usually root in 4 to 6 weeks.
Here are some step-by-step instructions for taking care of Bougainvillea ‘California Gold’: Planting: Bougainvillea ‘California Gold’ thrives in full sun or light shade, in acid, well-drained soils. It tolerates hot, dry locations fairly well but dislikes constantly wet soils. Plant bougainvillea outdoors if you’re in zones 9B through 11. If temperatures dip below freezing where you live, grow it in a pot and move it indoors in winter. Watering: Water your bougainvillea when the soil feels dry to the touch. Bougainvillea plants actually prefer the soil to dry out between watering. Fertilizing: Fertilize every two weeks during the growing season with a slow-release 10-10-10 fertilizer. Pruning: Regular pruning may be required to keep inbounds or shape the plant. Always prune this plant immediately after flowering. Be aware that repetitive pruning may reduce flowering as this plant flowers on new growth. Pinching the tips of new growth will encourage branching. Propagation: Cuttings 4-6 in. long (10-15 cm), put under mist, will usually root in 4 to 6 weeks.