What is the best fertilizer for clematis plants?

The best fertilizer for clematis is a combination of organic compost and a granular rose fertilizer such as Espoma Rose-tone. The nutritional needs of clematis are remarkably similar to those of roses.

Fertilizing with bone meal in the fall will also help boost root growth. Bone meal can attract animals that may dig, so be cautious if the area is not fenced off or if a dog or cat lives in the area. The compost helps keep the soil nutrient-rich and, combined with granular rose fertilizer, encourages the growth of beneficial microbes and fungi. Granular fertilizer should be kept at least 4 inches away from the stem to prevent damage and the ground needs to be heavily watered when the grains are applied.