Plumbago Not Blooming

Plumbago is a popular flowering shrub that is known for its vibrant blue or white flowers. It is a hardy plant that can grow in a variety of climates and soil types, making it a popular choice for gardens and landscaping.

Despite its hardiness, there are certain conditions that can prevent Plumbago from blooming, which can be frustrating for gardeners. Know the common causes of Plumbago not blooming and provide solutions to help the plant produce its beautiful flowers.

Causes of Plumbago not blooming

  • Lack of sunlight: Plumbago requires at least 6 hours of direct sunlight per day to bloom properly. If the plant is not getting enough sunlight, it will not produce flowers.
  • Over fertilization: Plumbago does not require a lot of fertilizer to bloom. Over fertilizing the plant can lead to excessive leaf growth and inhibit flower production.
  • Pest or disease infestation: Pests and diseases can damage the plant and inhibit its ability to bloom. Common pests that can affect Plumbago include aphids and whiteflies, while common diseases include powdery mildew and leaf spot.
  • Incorrect pruning: Plumbago should be pruned in late winter or early spring, before new growth begins. Pruning the plant at the wrong time can inhibit flower production.
  • Poor soil conditions: Plumbago prefers well-drained soil that is rich in organic matter. Poor soil conditions, such as heavy clay or sandy soil, can inhibit the plant’s ability to absorb nutrients and bloom.
  • Extreme temperatures: Plumbago is not tolerant of extreme cold or heat. Prolonged exposure to temperatures below freezing or above 90°F can damage the plant and inhibit blooming.

Other causes can be lack of water and over-crowding, or not providing the right fertilizer.


  • Provide adequate sunlight: Ensure that the Plumbago plant is getting at least 6 hours of direct sunlight per day by placing it in a sunny location or by providing artificial sunlight.
  • Reduce fertilization: Fertilize the plant with a balanced fertilizer at a lower rate, or according to the package instructions. Avoid over fertilizing the plant.
  • Identify and treat pests or diseases: Inspect the plant regularly for signs of pests or diseases, such as discolored leaves or small holes in the leaves. If pests or diseases are identified, treat the plant with an appropriate pesticide or fungicide.
  • Properly prune the plant: Prune the Plumbago plant in late winter or early spring, before new growth begins. Remove dead or damaged branches, and shape the plant to promote healthy growth and blooming.
  • Improve soil conditions: Improve the soil conditions by adding organic matter, such as compost, to the soil. This will help the plant absorb the nutrients it needs to bloom.
  • Protect the plant from extreme temperatures: Protect the Plumbago plant from extreme temperatures by providing shade during hot summer days or by covering the plant during freezing temperatures.
  • Provide the right fertilizer: Use fertilizer that is specially formulated for flowering plants, and that has a good balance of N-P-K (Nitrogen-Phosphorus-Potassium) nutrients.
  • Water the plant regularly: Ensure that the soil is consistently moist but not waterlogged. Plumbago requires regular watering, especially during hot and dry weather.

It’s important to note that some of these solutions may take some time to take effect, so be patient and keep monitoring the plant’s progress. It’s also important to consult with a horticulturist or an expert in case of severe problems or if you are unsure of what is causing the problem.


Plumbago is a beautiful and hardy plant that can add vibrant color to any garden. However, there are certain conditions that can prevent it from blooming. The main causes of Plumbago not blooming include lack of sunlight, over fertilization, pest or disease infestation, incorrect pruning, poor soil conditions, and extreme temperatures.

By understanding the causes and implementing appropriate solutions, such as providing adequate sunlight, reducing fertilization, treating pests or diseases, properly pruning the plant, improving soil conditions, protecting the plant from extreme temperatures, providing the right fertilizer, and watering regularly, gardeners can help the Plumbago plant produce its beautiful flowers.