Clivia and Gardenia Not Blooming? Causes and Solutions

Many people love growing flowers, but I believe many of you will run into all sorts of problems after bringing them home, and the most common and widespread problem of all is surely this: why won't my plant bloom?

In fact, there are many reasons why flowers fail to bloom. Apart from the plant itself being weak (or not yet meeting the conditions to bloom), other possible reasons that affect a plant's failure to bloom or its sparse flowering include: insufficient light, poor ventilation, unsuitable temperature, unsuitable soil pH, improper pruning, insufficient nutrients, too much nitrogen fertilizer, and pests and diseases. Today I'll share how to handle the failure to bloom in several common flowering plants:

I. Clivia Won't Bloom

1. Too much light: If Clivia is exposed to sunlight for too long in summer, its leaves will grow leggy (that is, abnormal, unhealthy rapid growth), which consumes a large amount of the plant's nutrients and thus affects Clivia's bud formation and preparation for blooming in winter. Clivia is suited to a spot with a little scattered light; growing it by a windowsill is very suitable.

2. Temperature too low: If the temperature where Clivia is grown is too low, below 10°C, its growth will be inhibited, and below 5°C it basically stops growing, let alone sending up a flower stalk and blooming - even the plant will look thin, small and yellow. Keeping Clivia at a suitable temperature in winter is crucial.

3. Insufficient nutrition: The thing Clivia hates most is compacted soil with no permeability. If you haven't repotted your Clivia since you bought it, that means its roots struggle to absorb water and nutrients, which will directly result in no blooms and only leaf growth. Clivia should be repotted and given fresh soil once a year after flowering.

4. Insufficient fertility: If you don't fertilize in time, it will certainly affect Clivia's growth. If there aren't even enough nutrients, how can it bloom? Giving Clivia a suitable amount of decomposed cake fertilizer as a base fertilizer is crucial; next, don't apply heavy fertilizer frequently in spring and autumn - only then can the soil's fertility be maintained, making blooming easier and the plant and roots grow stronger. In late autumn you can spray Clivia with a suitable amount of monopotassium phosphate, to encourage flower bud formation.

II. Gardenia Won't Bloom

1. Insufficient light: Gardenia likes a warm, bright, sunny and well-ventilated environment. Move the gardenia to a spot with good light and let it get some sun.

2. Potting soil too alkaline: Gardenia likes slightly acidic humus soil, with a pH of around 4.8 to 6 being most suitable. Alkaline soil turns the leaves yellow. When watering normally, you can add some ferrous sulfate to improve the soil, and you can also regularly apply a 10% alum fertilizer water as a top dressing.

3. Insufficient fertility: Gardenia likes fertilizer. During the growing season, apply decomposed cake fertilizer as a top dressing; before the flowering season, apply phosphorus and potassium fertilizer; do not fertilize during the flowering period. It is recommended to change the soil once every 1 to 2 years to maintain soil fertility.

III. Aglaia (Mock Lime) Won't Bloom

1. Soil too alkaline: Aglaia likes slightly acidic soil. If it is grown in alkaline soil, or regularly watered with alkaline water, this not only affects flowering but can easily lead to death. You can water it once every 10 days with prepared alum fertilizer water.

2. Insufficient nutrition: During the growing season, you can appropriately supplement with some cake fertilizer, alum fertilizer water, etc. Before the flowering season, reduce nitrogen fertilizer and supplement phosphorus and potassium fertilizer; do not fertilize during the flowering period, and supplement phosphorus fertilizer after flowering.

3. Insufficient light: Aglaia likes sunlight. If it is too shaded, flowering will also be affected, so move the Aglaia to a spot with good light and let it get some sun.

IV. Bougainvillea Won't Bloom

1. Insufficient light: Bougainvillea is a light-loving plant. If there is insufficient light or it is too shaded, the new branches grow thin and weak, the leaves are thin, and the flowers are few and small. Bougainvillea must be placed in a spot with ample light and good ventilation, giving it 8 to 12 hours of light every day.

2. Improper watering: Before the flowering period, do not water bougainvillea; control water appropriately. If watered too much, it will affect flower bud differentiation and make blooming difficult, so you need to wait until the leaves wilt before watering.

3. Improper fertilizing: Bougainvillea likes fertilizer and water, and should be fertilized generously, because bougainvillea blooms abundantly and has a long flowering period, consuming a lot of nutrients. In addition, potted plants have little soil and limited nutrients, so nutrients need to be replenished in time. If nutrients are insufficient and water and fertilizer conditions can't keep up, flowering will be delayed, the number of flowers will be small, and the flowering period will also be short. Depending on the size of the pot, generally once a month; during the peak growth period of bougainvillea, apply liquid fertilizer once every half a month, and apply more when the ambient temperature is higher. Applying more phosphorus and potassium fertilizer is beneficial for flower bud differentiation and ensures robust flower buds.

4. Branches too dense: Bougainvillea has vigorous vitality and will grow as dense as a forest within a few months. But a potted plant's soil and nutrients are very limited, and its growing space is also limited. If over-dense branches are not pruned in time, nutrients will be needlessly lost, affecting flower bud differentiation and making blooming difficult. You need to prune off the weak branches, dead branches and some useless branches of the bougainvillea.