What to Do If Climbing Roses Won't Bloom? Causes and Solutions

Climbing roses come in different flower shapes, with abundant and vividly colored blooms and a long flowering period. They can bloom in three seasons, and when the flowers open in clusters they give off a strong fragrance, offering excellent ornamental value and great popularity. However, failure to bloom is a common problem during cultivation. So why do climbing roses fail to bloom? And what should be done? Below, the Plant Encyclopedia editor explains the causes and solutions for climbing roses not blooming.

1. No pruning for a long time

Without pruning for a long time, there are too many branches, which disperses nutrients, affects flower bud formation and leads to no blooming.

Solution: Prune away the surrounding branches sensibly, keeping a few of the stronger main stems with a better branch structure, and cut off all the other side branches and messy leaves. This way, attractive flowers will grow on the main stems.

2. Insufficient light

Roses like warmth and plenty of sunlight. If the daily light duration is insufficient, it will also affect blooming.

Solution: During the flowering period, roses need sufficient light, at least no less than 6 hours of light per day. If there is not enough light indoors, they can be moved to a place with stronger light for growing. Ensure the rose gets enough light, and it will surely produce beautiful flowers.

3. Lack of fertilizer

Poor soil with insufficient fertility and lack of nutrients, especially lack of phosphorus fertilizer, affects flower bud differentiation, so it cannot bloom normally.

Solution: Roses bloom several times a year, have a long flowering period and produce many flowers, so they also absorb relatively more nutrients. During the flowering season, apply fertilizer several times in appropriate amounts, and choose a balanced fertilizer mix. Once the rose absorbs the nutrients, it will grow vigorously and produce beautiful flowers.

4. Poor ventilation

If the growing environment is too shaded and poorly ventilated, with insufficient light, flower bud formation is affected.

Solution: Roses like an environment with good air circulation and grow in places with relatively strong light. When growing roses, place them outdoors, where air circulation is good and light is strong, suitable for rose growth.

5. Lack of water

Climbing roses must not lack water throughout their entire life cycle, especially in midsummer when watering must be sufficient. If the soil moisture is insufficient at this time, the root system will be in soil that is both dry and hot, easily causing wilting of branches and leaves and scorched leaf edges, affecting autumn blooming.

Solution: From budding to leafing out and blooming, roses should be supplied with sufficient water. During the flowering period, they need two to three times the usual amount of water. Each time you water, the flower pot must be thoroughly watered, but water must not accumulate in the pot. After watering in the pot, wait until the water stops dripping from the bottom before placing it on a saucer. This way, there will be no water accumulation.

6. Temperature

The optimal growing temperature for climbing roses is 15-25°C. Below 5°C they begin dormancy, which affects blooming.

Solution: In early spring the weather changes unpredictably. This is exactly when roses enter the stage of axillary bud sprouting, flower bud differentiation and new shoot growth. Once damaged by late frost or cold waves, flower bud growth is hindered and they cannot bud and bloom. After new shoots are damaged by freezing, they wither, affecting the flowering rate of the first batch of spring flowers. Therefore, pay attention to taking protective measures to keep them from frost damage.

7. Excessive fertilizing

Some flower lovers apply too much fertilizer to roses, causing the branches and leaves to grow especially luxuriantly, which affects blooming.

Solution: At this point, stop fertilizing and cut off excess branches and leaves so that ventilation and light inside the pot are improved. Only then will the rose bloom instead of just growing leaves.

[Tips] Climbing roses are not true climbers; their branches are simply relatively long, and they do not climb. This kind of rose has a strong seasonal flowering habit, generally blooming in summer and autumn. In addition, it likes light, and sufficient sunlight is very important.