What to Do If Bougainvillea Only Grows Leaves and Does Not Bloom? Causes and Solutions

Bougainvillea is a plant with relatively strong adaptability and can be grown in both northern and southern China. It is a very suitable ornamental plant. However, in the process of growing bougainvillea, sometimes the leaves grow rampantly but the plant simply does not bloom. For a flowering plant to never bloom is quite a blow to growers. Below, Qinong Net will introduce to everyone what to do when bougainvillea does not bloom.

I. Causes of Bougainvillea Not Blooming

First, Qinong Net will introduce the causes of bougainvillea not blooming, and then find corresponding solutions based on the causes. Qinong Net has summarized four causes here, including too little growing space, insufficient light, overly dense branches, and improper water and fertilizer management. Let us take a closer look below.

1. Insufficient growing space

Bougainvillea has a well-developed root system and grows rapidly, so it needs to be repotted in a timely manner. Bougainvillea planted in gardens and courtyards in open ground often blooms abundantly because its root system has a large growing space and can extend without limit. However, household potted plants are limited by the size of the flowerpot. If they are not repotted in time, the root system grows poorly, and flowering will inevitably be affected.

2. Insufficient light

Bougainvillea originates from tropical regions and likes sufficient light. It needs light throughout its entire growth period, and even exposure to strong sun does not matter. The longer the sunshine duration, the more it blooms and the more brilliant the flower color. Conversely, it will not only fail to bloom, but even the leaves will gradually become dull and leaf drop will occur.

3. Overly dense branches

Bougainvillea has vigorous vitality and will become as dense as a forest within a few months, so it needs timely pruning. If the branches are not pruned in time and become too dense, excess nutrients will be lost, affecting flower bud differentiation and making blooming difficult.

4. Improper water and fertilizer

Before the flowering period, water should be properly controlled. If watered too much, flower bud differentiation will be affected and blooming will be difficult. In addition, bougainvillea needs sufficient nutrients to bloom, especially phosphorus and potassium fertilizers. But if too much nitrogen fertilizer is applied, the leaves will be emerald green and the flowers will be sparse.

II. Solutions for Bougainvillea Not Blooming

1. Repot in time

According to the different growth conditions of the plant, we should repot bougainvillea in a timely manner. The repotting time is usually chosen in spring. If the plant grows relatively well, there may be two repotting processes in a year. As long as it meets the growth needs of the plant, that is normal.

2. Increase light

According to the flowering period of bougainvillea, supplement light in advance. Bougainvillea in the north needs to be grown in a greenhouse. If the light environment in the greenhouse is relatively poor, fluorescent lamps can be used to supplement light.

3. Prune in time

If bougainvillea grows too densely, it should be pruned in time. This is not only more attractive, but also ensures that nutrients can be used effectively, and it is also beneficial for ventilation.

4. Control water and increase fertilizer

The flowering period of bougainvillea is between winter and spring. Before the flowering period arrives, water must be strictly controlled, and watering can wait until the leaves wilt; at the same time, fertilization must also be well controlled, with timely topdressing. When fertilizing, nitrogen fertilizer can be appropriately reduced and phosphorus and potassium fertilizers increased, which is more conducive to blooming.

The above is what Qinong Net has introduced regarding the causes of bougainvillea not blooming and the corresponding solutions, hoping to bring everyone some help. Note that bougainvillea is a light-loving plant. If you want to prolong the flowering period, you must increase light, and at the same time prune in time after the flowers fade, so that you can see the magnificent scene of blooming again the next year.