Answer: Bougainvillea's vibrant colors come not from the inconspicuous true flowers, but from the large, papery, petal-like bracts that surround them. What you're witnessing is fading of the bracts, probably due to a nutrient deficiency. You've planted a very vigorous type, and once put on a regular feeding and watering schedule, your plant should perk right up. Bougainvillea's prefer rich, well-draining soil and deep, thorough watering throughout the growing season. Water as often as necessary to keep the soil moist but not soggy wet. Feed (if you haven't already) with a balanced 10-20-20 fertilizer, according to label directions.
Q&A Library Searching Tips