Many may assume springtime is the ideal season for landscaping installations, but for plantings like trees, shrubs and grass, fall is the best time for projects because of the warm days and cool evenings and the increased precipitation that assists new plant establishment. With fall plantings, you’ll have six to eight months to get roots established before warmer months, weeds are less frequent and the soil temperature is still warm. However, for perennial and annual flowers, springtime is the best time for planting.