1: Lack of privacy and security issues can be a disadvantage of landscape design.

2: High maintenance costs and effort required are common drawbacks of elaborate landscapes.

3: Invasive plant species can spread and overwhelm the natural ecosystem in landscaped areas.

4: Improper drainage and water accumulation are potential problems with poorly designed landscapes.

5: Limited space for outdoor activities and functional purposes may be a downside of extensive landscaping.

6: Seasonal changes and weather conditions can affect the maintenance and appearance of landscapes.

7: Landscaping mistakes, such as incorrect plant placement, can result in long-term issues and expenses.

8: Chemical usage in landscaping can have negative impacts on the environment and soil quality.

9: Overuse of artificial elements in landscape design can detract from the natural beauty of the surroundings.