Wash the rocks using mild soap and water to remove dirt. Let dry.
Spray paint the rocks with white spray primer. Give several coats and let dry.
Paint the rocks with a coat of red and let dry. Don't forget to get the sides a little.
Flip over and paint on the other side. Keep repeating this process of painting each side until the rocks are covered.
Draw stems on the rocks with green paint pens. I started with the first layer in a medium green. Then I let dry and added stem accents with a lighter green.
Draw on the achenes (seed like structures) with black and white paint pens. Make white tick marks all over the red area with a white pen. Let dry. Then make dots on top with a black pen and let dry.
Seal with several coats of Mod Podge and let dry completely before displaying in your home or garden.
Notes
Step 2: While spray priming isn't 100% essential for this project, I did find that my reds were brighter with it. When I painted an unprimed rock with multiple (over 10!) coats of red, I still found the dinginess of the rock to show through.