Live to Plant

Why is My Cup Plant Drooping

Updated: April 17, 2022

Cup plants, also known as Silphium perfoliatum, are native to North America and are known for their tall stems and large, cup-shaped leaves. They can grow up to 10 feet tall and produce bright yellow flowers in the late summer months. However, if you notice that your cup plant is drooping, there may be a few reasons why.

Lack of Water

One of the most common reasons why cup plants droop is due to a lack of water. Cup plants require consistent moisture, especially during the hot summer months. If the soil around the plant is dry, the leaves will start to wilt and droop. Make sure to water your cup plant regularly, especially during dry spells.

Root Rot

Root rot is a fungal disease that affects the roots of plants. It is caused by overwatering or poor drainage, which leads to waterlogged soil. When a plant has root rot, it cannot absorb water properly, causing its leaves to droop and wilt. To prevent root rot, make sure your cup plant is planted in well-draining soil and avoid overwatering.


Some pests, such as aphids and spider mites, can cause cup plants to droop. These pests feed on the sap of the plant, which can cause the leaves to become distorted and wilted. If you suspect pests are causing your cup plant to droop, inspect the leaves carefully for signs of infestation. You can also use insecticidal soap or neem oil to control pest populations.


Cup plants can also be affected by various diseases, such as bacterial leaf spot or powdery mildew. These diseases can cause the leaves to droop and develop spots or a white powdery coating. To prevent disease, make sure your cup plant has good air circulation and avoid overhead watering.


Overfertilization can also cause cup plants to droop. When plants receive too much fertilizer, the salt buildup in the soil can cause root damage and prevent the plant from absorbing water properly. To prevent overfertilization, use a slow-release fertilizer and follow the manufacturer’s instructions.

Environmental Factors

Environmental factors, such as extreme heat or cold, can also cause cup plants to droop. If you notice your cup plant drooping during extreme weather conditions, provide extra water or shade as needed.

In summary, there are several reasons why cup plants may droop, including lack of water, root rot, pests, disease, overfertilization, and environmental factors. By identifying the cause of drooping and taking appropriate action, you can help your cup plant recover and thrive.


Can cup plants grow in full sun?

Yes, cup plants prefer full sun but can also tolerate partial shade.

How often should I water my cup plant?

Cup plants require consistent moisture, so water them regularly, especially during dry spells. However, make sure not to overwater as this can lead to root rot.

Can cup plants be grown in containers?

Yes, cup plants can be grown in large containers as long as they have good drainage.

How tall do cup plants grow?

Cup plants can grow up to 10 feet tall.

What pests can affect cup plants?

Common pests that can affect cup plants include aphids and spider mites.