A new Tetrapanax, also known as rice paper plant, collapsing can be due to several reasons. Here are the most common factors to consider:

1. Watering Issues:

• Overwatering: This can lead to root rot, causing the plant to collapse. Ensure the soil has good drainage and that you’re not watering too frequently.
• Underwatering: Conversely, if the plant is not getting enough water, it can wilt and collapse. Keep the soil consistently moist but not waterlogged.

1. Transplant Shock:

• Moving a Tetrapanax to a new location can cause stress, leading to a temporary collapse. This is due to the roots needing time to establish themselves in the new soil.

1. Environmental Factors:

• Temperature: Sudden changes in temperature, especially cold drafts, can stress the plant.
• Light: Tetrapanax plants prefer partial shade. Too much direct sunlight can cause them to collapse.
• Humidity: Low humidity levels can also stress the plant, leading to collapse.

1. Soil Conditions:

• Ensure the soil is well-draining and rich in organic matter. Poor soil conditions can prevent the plant from getting the necessary nutrients and water.

1. Pests and Diseases:

• Check for signs of pests such as aphids, spider mites, or other insects that can damage the plant.
• Fungal infections or other diseases can also cause the plant to weaken and collapse.

1. Root Damage:

• If the roots were damaged during planting or by pests, the plant may not be able to support itself.

1. Nutrient Deficiency:

• A lack of essential nutrients, especially nitrogen, can lead to weak growth and collapse. Consider using a balanced fertilizer.

Steps to Help Your Tetrapanax Recover

1. Check Soil Moisture: Ensure the soil is evenly moist but not soggy. Adjust your watering schedule as needed.
2. Inspect Roots: If possible, gently check the roots for rot or damage. Trim away any damaged roots.
3. Protect from Extreme Conditions: Shield the plant from direct sunlight, cold drafts, and ensure it’s in a humid environment.
4. Use Mulch: Mulch around the base to retain moisture and regulate soil temperature.
5. Fertilize: Apply a balanced fertilizer to provide necessary nutrients.

If the collapse is due to transplant shock, the plant should recover with proper care over time. Monitor it closely and adjust care practices as needed.