How often should I water my bougainvillea in Phoenix?
Keeping this in view, can you over water bougainvillea?
Overwatering Bougainvillea Be careful not to overwater Bougainvillea plants, because too much water causes fewer blooms and an abundance of foliage. If the vine is not blooming, allow the vine's foliage to wilt between watering. When plants go dormant in winter, reduce watering to once per month.
Beside this, how do you keep bougainvillea blooming?
Bougainvillea growers often withhold water for extended periods to force the plant into bloom. To stimulate blooming this way, withhold all water until the leaves begin to wilt. Then water thoroughly. For regular maintenance, water only when the soil is dry but before leaves show signs of stress.
Bougainvillea are heavy feeders and love to slurp up weekly elixirs of half strength 20-20-20, flowering plant fertilizer or Miracle-Gro. With good sunlight and regular feeding Bougainvillea will bloom repeatedly almost year round. This could last for several weeks and often does not involve any new blooms.