The answer to 'landscape design not growing' is that there are several common causes, including poor soil quality, inadequate sunlight, improper planting techniques, and insufficient watering. Symptoms may include stunted growth, yellowing or wilting leaves, and lack of flowering or fruiting.
To troubleshoot, start by evaluating the soil - test the pH and nutrient levels, and amend as needed. Make sure plants are receiving the right amount of sunlight for their species. Review your planting methods to ensure proper depth, spacing, and mulching. Finally, establish a consistent watering schedule, adjusting as needed based on weather and plant needs.