Prepare the growing area in the spring when the soil and the air temperature are warm and all threat of frost is over. Use the garden spade to work the soil down to a depth of at least 1 foot. Add approximately 4 inches of compost to the top of the soil and work this in with the garden spade. Rake the soil surface smooth.
Use the shovel to dig holes for the purple coneflower plants. Make each hole two times larger than the diameter of the plants' temporary containers and the same depth as the containers. Space each hole 2 feet apart.
Remove each coneflower plant from its temporary container and place each plant into a prepared hole. The top of the coneflower roots must be even with the soil surface. Fill garden soil in around the roots of the plants and pat the soil down lightly with your hands. Water the newly planted coneflowers generously immediately after planting.
Sprinkle the granular fertilizer lightly over the soil around the coneflowers and use a hand tool to work the fertilizer into the soil. Ensure that the fertilizer does not touch any part of the plants.
Add 2 inches of shredded mulch around the base of the coneflower plants to prevent weed growth and help conserve moisture in the soil.
Water the purple coneflowers if less than 1 inch of rain falls within a one-week period.
Drive stakes into the ground beside tall coneflowers if they need support. Attach the coneflower stems to the stakes carefully with twine.
Use the garden shears to clip off spent blossoms during the growing season. However, you may opt to let some blossoms go to seed as this will attract birds, particularly goldfinches.